1
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Kaewmorakot S, Papaderakis AA, Dryfe RAW. Electrowetting on glassy carbon substrates. NANOSCALE ADVANCES 2024:d4na00506f. [PMID: 39247860 PMCID: PMC11378016 DOI: 10.1039/d4na00506f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2024] [Accepted: 08/29/2024] [Indexed: 09/10/2024]
Abstract
The wetting properties of carbon surfaces are important for a number of applications, including in electrochemistry. An under-studied area is the electrowetting properties of carbon materials, namely the sensitivity of wetting to an applied potential. In this work we explore the electrowetting behaviour of glassy carbon substrates and compare and contrast the observed response with our previous work using highly oriented pyrolytic graphite. As with the graphite substrate, "water-in-salt" electrolytes are found to suppress faradaic processes, thereby enlarging the electrochemical potential window. A notable difference in response to positive and negative polarity was seen for the graphite and glassy carbon substrates. Moreover, whereas graphite has previously been shown to give a reversible electrowetting response over many cycles, an irreversible wetting was observed for glassy carbon. Similarly, the timescales of the wetting process were much faster on the graphitic substrate. Reasons underlying these marked changes in behaviour on the different carbon surfaces are suggested.
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Affiliation(s)
- Sittipong Kaewmorakot
- Henry Royce Institute, University of Manchester Oxford Road Manchester M13 9PL UK
- Department of Chemistry, University of Manchester Oxford Road Manchester M13 9PL UK
| | - Athanasios A Papaderakis
- Henry Royce Institute, University of Manchester Oxford Road Manchester M13 9PL UK
- Department of Chemistry, University of Manchester Oxford Road Manchester M13 9PL UK
| | - Robert A W Dryfe
- Henry Royce Institute, University of Manchester Oxford Road Manchester M13 9PL UK
- Department of Chemistry, University of Manchester Oxford Road Manchester M13 9PL UK
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2
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Goloviznina K, Fleischhaker J, Binninger T, Rotenberg B, Ers H, Ivanistsev V, Meissner R, Serva A, Salanne M. Accounting for the Quantum Capacitance of Graphite in Constant Potential Molecular Dynamics Simulations. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024:e2405230. [PMID: 39096068 DOI: 10.1002/adma.202405230] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2024] [Revised: 07/19/2024] [Indexed: 08/04/2024]
Abstract
Molecular dynamics (MD) simulations at a constant electric potential are an essential tool to study electrochemical processes, providing microscopic information on the structural, thermodynamic, and dynamical properties. Despite the numerous advances in the simulation of electrodes, they fail to accurately represent the electronic structure of materials such as graphite. In this work, a simple parameterization method that allows to tune the metallicity of the electrode based on a quantum chemistry calculation of the density of states (DOS) is introduced. As a first illustration, the interface between graphite electrodes and two different liquid electrolytes, an aqueous solution of NaCl and a pure ionic liquid, at different applied potentials are studied. It is shown that the simulations reproduce qualitatively the experimentally-measured capacitance; in particular, they yield a minimum of capacitance at the point of zero charge (PZC), which is due to the quantum capacitance (QC) contribution. An analysis of the structure of the adsorbed liquids allows to understand why the ionic liquid displays a lower capacitance despite its large ionic concentration. In addition to its relevance for the important class of carbonaceous electrodes, this method can be applied to any electrode materials (e.g. 2D materials, conducting polymers, etc), thus enabling molecular simulation studies of complex electrochemical devices in the future.
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Affiliation(s)
- Kateryna Goloviznina
- CNRS, Physicochimie des Électrolytes et Nanosystèmes Interfaciaux, Sorbonne Université, F-75005, Paris, France
- Réseau sur le Stockage Electrochimique de l'Energie (RS2E), FR CNRS 3459, 80039, Amiens Cedex, France
| | - Johann Fleischhaker
- CNRS, Physicochimie des Électrolytes et Nanosystèmes Interfaciaux, Sorbonne Université, F-75005, Paris, France
- Institute of Polymers and Composites, Hamburg University of Technology, 21073, Hamburg, Germany
| | - Tobias Binninger
- ICGM, Univ Montpellier, CNRS, ENSCM, 34293, Montpellier, France
- Theory and Computation of Energy Materials (IEK-13), Institute of Energy and Climate Research, Forschungszentrum Jülich GmbH, 52425, Jülich, Germany
| | - Benjamin Rotenberg
- CNRS, Physicochimie des Électrolytes et Nanosystèmes Interfaciaux, Sorbonne Université, F-75005, Paris, France
- Réseau sur le Stockage Electrochimique de l'Energie (RS2E), FR CNRS 3459, 80039, Amiens Cedex, France
| | - Heigo Ers
- University of Tartu, Ravila 14a, Tartu, 51004, Estonia
| | | | - Robert Meissner
- Institute of Polymers and Composites, Hamburg University of Technology, 21073, Hamburg, Germany
- Institute of Surface Science, Helmholtz-Zentrum Hereon, 21502, Geesthacht, Germany
| | - Alessandra Serva
- CNRS, Physicochimie des Électrolytes et Nanosystèmes Interfaciaux, Sorbonne Université, F-75005, Paris, France
- Réseau sur le Stockage Electrochimique de l'Energie (RS2E), FR CNRS 3459, 80039, Amiens Cedex, France
| | - Mathieu Salanne
- CNRS, Physicochimie des Électrolytes et Nanosystèmes Interfaciaux, Sorbonne Université, F-75005, Paris, France
- Réseau sur le Stockage Electrochimique de l'Energie (RS2E), FR CNRS 3459, 80039, Amiens Cedex, France
- Institut Universitaire de France (IUF), 75231, Paris, France
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3
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Levell Z, Le J, Yu S, Wang R, Ethirajan S, Rana R, Kulkarni A, Resasco J, Lu D, Cheng J, Liu Y. Emerging Atomistic Modeling Methods for Heterogeneous Electrocatalysis. Chem Rev 2024; 124:8620-8656. [PMID: 38990563 DOI: 10.1021/acs.chemrev.3c00735] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/12/2024]
Abstract
Heterogeneous electrocatalysis lies at the center of various technologies that could help enable a sustainable future. However, its complexity makes it challenging to accurately and efficiently model at an atomic level. Here, we review emerging atomistic methods to simulate the electrocatalytic interface with special attention devoted to the components/effects that have been challenging to model, such as solvation, electrolyte ions, electrode potential, reaction kinetics, and pH. Additionally, we review relevant computational spectroscopy methods. Then, we showcase several examples of applying these methods to understand and design catalysts relevant to green hydrogen. We also offer experimental views on how to bridge the gap between theory and experiments. Finally, we provide some perspectives on opportunities to advance the field.
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Affiliation(s)
- Zachary Levell
- Texas Materials Institute and Department of Mechanical Engineering, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Jiabo Le
- Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, 1219 Zhongguan West Road, Ningbo 315201, China
| | - Saerom Yu
- Texas Materials Institute and Department of Mechanical Engineering, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Ruoyu Wang
- Texas Materials Institute and Department of Mechanical Engineering, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Sudheesh Ethirajan
- Department of Chemical Engineering, University of California, Davis, California 95616, United States
| | - Rachita Rana
- Department of Chemical Engineering, University of California, Davis, California 95616, United States
| | - Ambarish Kulkarni
- Department of Chemical Engineering, University of California, Davis, California 95616, United States
| | - Joaquin Resasco
- Department of Chemical Engineering, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Deyu Lu
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Jun Cheng
- State Key Laboratory of Physical Chemistry of Solid Surfaces, iChEM, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
- Laboratory of AI for Electrochemistry (AI4EC), Tan Kah Kee Innovation Laboratory, Xiamen 361005, China
| | - Yuanyue Liu
- Texas Materials Institute and Department of Mechanical Engineering, The University of Texas at Austin, Austin, Texas 78712, United States
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4
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Finney AR, Salvalaglio M. Properties of aqueous electrolyte solutions at carbon electrodes: effects of concentration and surface charge on solution structure, ion clustering and thermodynamics in the electric double layer. Faraday Discuss 2024; 249:334-362. [PMID: 37781909 DOI: 10.1039/d3fd00133d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/03/2023]
Abstract
Surfaces are able to control physical-chemical processes in multi-component solution systems and, as such, find application in a wide range of technological devices. Understanding the structure, dynamics and thermodynamics of non-ideal solutions at surfaces, however, is particularly challenging. Here, we use Constant Chemical Potential Molecular Dynamics (CμMD) simulations to gain insight into aqueous NaCl solutions in contact with graphite surfaces at high concentrations and under the effect of applied surface charges: conditions where mean-field theories describing interfaces cannot (typically) be reliably applied. We discover an asymmetric effect of surface charge on the electric double layer structure and resulting thermodynamic properties, which can be explained by considering the affinity of the surface for cations and anions and the cooperative adsorption of ions that occurs at higher concentrations. We characterise how the sign of the surface charge affects ion densities and water structure in the double layer and how the capacitance of the interface-a function of the electric potential drop across the double layer-is largely insensitive to the bulk solution concentration. Notably, we find that negatively charged graphite surfaces induce an increase in the size and concentration of extended liquid-like ion clusters confined to the double layer. Finally, we discuss how concentration and surface charge affect the activity coefficients of ions and water at the interface, demonstrating how electric fields in this region should be explicitly considered when characterising the thermodynamics of both solute and solvent at the solid/liquid interface.
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Affiliation(s)
- Aaron R Finney
- Thomas Young Centre and Department of Chemical Engineering, University College London, London WC1E 7JE, UK.
| | - Matteo Salvalaglio
- Thomas Young Centre and Department of Chemical Engineering, University College London, London WC1E 7JE, UK.
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5
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Deshsorn K, Payakkachon K, Chaisrithong T, Jitapunkul K, Lawtrakul L, Iamprasertkun P. Unlocking the Full Potential of Heteroatom-Doped Graphene-Based Supercapacitors through Stacking Models and SHAP-Guided Optimization. J Chem Inf Model 2023; 63:5077-5088. [PMID: 37635637 DOI: 10.1021/acs.jcim.3c00670] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/29/2023]
Abstract
Graphene-based supercapacitors have emerged as a promising candidate for energy storage due to their superior capacitive properties. Heteroatom-doping is a method of improving the capacitive properties of graphene-based electrodes, but the optimal doping conditions and electrochemical properties are not yet fully understood due to the synergistic effects that occur. Many parameters, such as doping content, defects, specific surface area (SA), electrolyte, and more, could affect the capacitance (CAP). In this study, we use machine learning to solve these critical issues. We applied many models, such as Light Gradient Boost Machine, Extreme Gradient Boost, Polynomial Regression, Neural Network, Elastic Net, Lasso Regression, Ridge Regression, Random Forest, Support Vector Machine, K-Nearest Neighbors, Gradient Boost, AdaBoost, and Decision Tree, to find a suitable model for CAP prediction. Moreover, we enhance the prediction result by taking advantage of the top candidate model and creating a stacking concept (called "stacking models"). The SHAP value was used to identify the range of properties that affect CAP, and it was discussed in detail. Our results suggest that high-CAP graphene supercapacitors should have a large SA, with 4-5% nitrogen, 10-15% oxygen, high percentages of sulfur, a defect ratio close to 1, with acid electrolyte, and a low current density. These findings, along with the developed model and code, are expected to serve as a valuable computational tool for future electrochemical research from fundamental to applications.
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Affiliation(s)
- Krittapong Deshsorn
- School of Bio-Chemical Engineering and Technology, Sirindhorn International Institute of Technology, Thammasat University, Pathum Thani 12120, Thailand
| | - Krittamate Payakkachon
- School of Bio-Chemical Engineering and Technology, Sirindhorn International Institute of Technology, Thammasat University, Pathum Thani 12120, Thailand
| | - Tanapat Chaisrithong
- School of Bio-Chemical Engineering and Technology, Sirindhorn International Institute of Technology, Thammasat University, Pathum Thani 12120, Thailand
| | - Kulpavee Jitapunkul
- School of Bio-Chemical Engineering and Technology, Sirindhorn International Institute of Technology, Thammasat University, Pathum Thani 12120, Thailand
| | - Luckhana Lawtrakul
- School of Bio-Chemical Engineering and Technology, Sirindhorn International Institute of Technology, Thammasat University, Pathum Thani 12120, Thailand
| | - Pawin Iamprasertkun
- School of Bio-Chemical Engineering and Technology, Sirindhorn International Institute of Technology, Thammasat University, Pathum Thani 12120, Thailand
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6
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Di Pasquale N, Finney AR, Elliott JD, Carbone P, Salvalaglio M. Constant chemical potential-quantum mechanical-molecular dynamics simulations of the graphene-electrolyte double layer. J Chem Phys 2023; 158:134714. [PMID: 37031135 DOI: 10.1063/5.0138267] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/10/2023] Open
Abstract
We present the coupling of two frameworks-the pseudo-open boundary simulation method known as constant potential molecular dynamics simulations (CμMD), combined with quantum mechanics/molecular dynamics (QMMD) calculations-to describe the properties of graphene electrodes in contact with electrolytes. The resulting CμQMMD model was then applied to three ionic solutions (LiCl, NaCl, and KCl in water) at bulk solution concentrations ranging from 0.5 M to 6 M in contact with a charged graphene electrode. The new approach we are describing here provides a simulation protocol to control the concentration of electrolyte solutions while including the effects of a fully polarizable electrode surface. Thanks to this coupling, we are able to accurately model both the electrode and solution side of the double layer and provide a thorough analysis of the properties of electrolytes at charged interfaces, such as the screening ability of the electrolyte and the electrostatic potential profile. We also report the calculation of the integral electrochemical double layer capacitance in the whole range of concentrations analyzed for each ionic species, while the quantum mechanical simulations provide access to the differential and integral quantum capacitance. We highlight how subtle features, such as the adsorption of potassium graphene or the tendency of the ions to form clusters contribute to the ability of graphene to store charge, and suggest implications for desalination.
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Affiliation(s)
- Nicodemo Di Pasquale
- Department of Chemical Engineering, Brunel University London, Uxbridge UB8 3PH, United Kingdom
| | - Aaron R Finney
- Department of Chemical Engineering, University College London, London WC1E 7JE, United Kingdom
| | - Joshua D Elliott
- Department of Chemical Engineering, University of Manchester, Manchester M13 9PL, United Kingdom
| | - Paola Carbone
- Department of Chemical Engineering, University of Manchester, Manchester M13 9PL, United Kingdom
| | - Matteo Salvalaglio
- Department of Chemical Engineering, University College London, London WC1E 7JE, United Kingdom
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7
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Deerattrakul V, Sakulaue P, Bunpheng A, Kraithong W, Pengsawang A, Chakthranont P, Iamprasertkun P, Itthibenchapong V. Introducing Hydrophilic Cellulose Nanofiber as a Bio-Separator for “Water-In-Salt” Based Energy Storage Devices. Electrochim Acta 2023. [DOI: 10.1016/j.electacta.2023.142355] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/04/2023]
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8
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Robert A, Berthoumieux H, Bocquet ML. Coupled Interactions at the Ionic Graphene-Water Interface. PHYSICAL REVIEW LETTERS 2023; 130:076201. [PMID: 36867792 DOI: 10.1103/physrevlett.130.076201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Accepted: 01/13/2023] [Indexed: 06/18/2023]
Abstract
We compute ionic free energy adsorption profiles at an aqueous graphene interface by developing a self-consistent approach. To do so, we design a microscopic model for water and put the liquid on an equal footing with the graphene described by its electronic band structure. By evaluating progressively the electronic and dipolar coupled electrostatic interactions, we show that the coupling level including mutual graphene and water screening permits one to recover remarkably the precision of extensive quantum simulations. We further derive the potential of mean force evolution of several alkali cations.
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Affiliation(s)
- Anton Robert
- PASTEUR, Département de chimie, École normale supérieure, Université PSL, CNRS, Sorbonne Université, 75005 Paris, France
| | - Hélène Berthoumieux
- Sorbonne Université, CNRS, Laboratoire de Physique Théorique de la Matière Condensée (LPTMC, UMR 7600), F-75005 Paris, France
- Fachbereich Physik, Freie Universität Berlin, Arnimallee 14, Berlin 14195, Germany
| | - Marie-Laure Bocquet
- LPENS, École normale supérieure, Université PSL, CNRS, Sorbonne Université, Université Paris Cité, F-75005 Paris, France
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9
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Dinh TD, Jang JW, Hwang S. Long-Range Electrification of an Air/Electrolyte Interface and Probing Potential of Zero Charge by Conductive Amplitude-Modulated Atomic Force Microscopy. Anal Chem 2023; 95:2901-2908. [PMID: 36691706 DOI: 10.1021/acs.analchem.2c04461] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
The structure of an electrical double layer (EDL) at the interface of electrode/electrolyte or air/electrode/electrolyte is a fundamental aspect, however not fully understood. The potential of zero charge (PZC) is one of the clues to dictate the EDL, where the excess charge on the electrode surface is zero. Here, a nanoscale configuration of immersion method was proposed by integrating an electrochemical system into conductive atomic force spectroscopy under the amplitude modulation (AM) mode and agarose gel as the solid-liquid electrolyte. The PZC of boron-doped diamond was determined to be at 0.2 V (vs Ag/AgCl). By AM spectroscopy, the capacitive force shows remote electrification without direct electrode/electrolyte contact, which is dependent on the population of ions at the air/electrolyte interface. The surface potential by alignment of water is also evaluated. Prospectively, our study could benefit applications such as PZC measurement and non-electrode electrochemical processes at the air/electrolyte interface.
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Affiliation(s)
- Thanh Duc Dinh
- Department of Advanced Materials Chemistry, Korea University, Sejong 30019, Korea
| | - Jae-Won Jang
- Division of Physics and Semiconductor Science, Dongguk University, Seoul 04620, Korea
| | - Seongpil Hwang
- Department of Advanced Materials Chemistry, Korea University, Sejong 30019, Korea
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10
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H H, Mewada R, Mallajosyula SS. Capturing charge and size effects of ions at the graphene-electrolyte interface using polarizable force field simulations. NANOSCALE ADVANCES 2023; 5:796-804. [PMID: 36756506 PMCID: PMC9891073 DOI: 10.1039/d2na00733a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Accepted: 12/27/2022] [Indexed: 06/18/2023]
Abstract
We present a systematic investigation capturing the charge and size effects of ions interacting with a graphene surface using polarizable simulations. Our results utilizing the Drude polarizable force field (FF) for ions, water and graphene surfaces, show that the graphene parameters previously developed by us are able to accurately capture the dynamics at the electrolyte-graphene interface. For monovalent ions, with increasing size, the solvation shell plays a crucial role in controlling the ion-graphene interactions. Smaller monovalent ions directly interact with the graphene surface, while larger ions interact with the graphene surface via a well-formed solvation shell. For divalent ions, both interaction modes are observed. For the anion Cl-, we observe direct interaction between the ions and the graphene surface. The anion-graphene interactions are strongly driven by the polarizability of the graphene surface. These effects are not captured in the absence of polarization by additive FF simulations. The present study underlines the importance of polarizability in capturing the interfacial phenomenon at the solid-solute interface.
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Affiliation(s)
- Hemanth H
- Discipline of Chemistry, Indian Institute of Technology Gandhinagar Palaj Gujarat India-382355
| | - Rohan Mewada
- Discipline of Material Science and Engineering, Indian Institute of Technology Gandhinagar Palaj Gujarat India-382355
| | - Sairam S Mallajosyula
- Discipline of Chemistry, Indian Institute of Technology Gandhinagar Palaj Gujarat India-382355
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11
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Vos JE, Erné BH. Capacitive charging rate dependence of heat from porous carbon in aqueous salt solution. Electrochim Acta 2023. [DOI: 10.1016/j.electacta.2023.141957] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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12
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Papaderakis AA, Polus K, Kant P, Box F, Etcheverry B, Byrne C, Quinn M, Walton A, Juel A, Dryfe RAW. Taming Electrowetting Using Highly Concentrated Aqueous Solutions. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2022; 126:21071-21083. [PMID: 36561202 PMCID: PMC9761672 DOI: 10.1021/acs.jpcc.2c06517] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Revised: 11/10/2022] [Indexed: 06/17/2023]
Abstract
Wetting of carbon surfaces is one of the most widespread, yet poorly understood, physical phenomena. Control over wetting properties underpins the operation of aqueous energy-storage devices and carbon-based filtration systems. Electrowetting, the variation in the contact angle with an applied potential, is the most straightforward way of introducing control over wetting. Here, we study electrowetting directly on graphitic surfaces with the use of aqueous electrolytes to show that reversible control of wetting can be achieved and quantitatively understood using models of the interfacial capacitance. We manifest that the use of highly concentrated aqueous electrolytes induces a fully symmetric and reversible wetting behavior without degradation of the substrate within the unprecedented potential window of 2.8 V. We demonstrate where the classical "Young-Lippmann" models apply, and break down, and discuss reasons for the latter, establishing relations among the applied bias, the electrolyte concentration, and the resultant contact angle. The approach is extended to electrowetting at the liquid|liquid interface, where a concentrated aqueous electrolyte drives reversibly the electrowetting response of an insulating organic phase with a significantly decreased potential threshold. In summary, this study highlights the beneficial effect of highly concentrated aqueous electrolytes on the electrowettability of carbon surfaces, being directly related to the performance of carbon-based aqueous energy-storage systems and electronic and microfluidic devices.
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Affiliation(s)
- Athanasios A. Papaderakis
- Department
of Chemistry, University of Manchester, Oxford Road, ManchesterM13 9PL, United Kingdom
- Henry
Royce Institute, University of Manchester, Oxford Road, ManchesterM13 9PL, United Kingdom
| | - Kacper Polus
- Department
of Chemistry, University of Manchester, Oxford Road, ManchesterM13 9PL, United Kingdom
- Photon
Science Institute, University of Manchester, Oxford Road, ManchesterM13 9PL, United Kingdom
| | - Pallav Kant
- Department
of Physics and Astronomy, Manchester Center for Nonlinear Dynamics, University of Manchester, Oxford Road, ManchesterM13 9PL, United
Kingdom
| | - Finn Box
- Department
of Physics and Astronomy, Manchester Center for Nonlinear Dynamics, University of Manchester, Oxford Road, ManchesterM13 9PL, United
Kingdom
| | - Bruno Etcheverry
- Department
of Physics and Astronomy, Manchester Center for Nonlinear Dynamics, University of Manchester, Oxford Road, ManchesterM13 9PL, United
Kingdom
| | - Conor Byrne
- Department
of Chemistry, University of Manchester, Oxford Road, ManchesterM13 9PL, United Kingdom
- Photon
Science Institute, University of Manchester, Oxford Road, ManchesterM13 9PL, United Kingdom
| | - Martin Quinn
- Department
of Physics and Astronomy, Manchester Center for Nonlinear Dynamics, University of Manchester, Oxford Road, ManchesterM13 9PL, United
Kingdom
| | - Alex Walton
- Department
of Chemistry, University of Manchester, Oxford Road, ManchesterM13 9PL, United Kingdom
- Photon
Science Institute, University of Manchester, Oxford Road, ManchesterM13 9PL, United Kingdom
| | - Anne Juel
- Department
of Physics and Astronomy, Manchester Center for Nonlinear Dynamics, University of Manchester, Oxford Road, ManchesterM13 9PL, United
Kingdom
| | - Robert A. W. Dryfe
- Department
of Chemistry, University of Manchester, Oxford Road, ManchesterM13 9PL, United Kingdom
- Henry
Royce Institute, University of Manchester, Oxford Road, ManchesterM13 9PL, United Kingdom
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13
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Electric Double Layer: The Good, the Bad, and the Beauty. ELECTROCHEM 2022. [DOI: 10.3390/electrochem3040052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022] Open
Abstract
The electric double layer (EDL) is the most important region for electrochemical and heterogeneous catalysis. Because of it, its modeling and investigation are something that can be found in the literature for a long time. However, nowadays, it is still a hot topic of investigation, mainly because of the improvement in simulation and experimental techniques. The present review aims to present the classical models for the EDL, as well as presenting how this region affects electrochemical data in everyday experimentation, how to obtain and interpret information about EDL, and, finally, how to obtain some molecular point of view insights on it.
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14
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Kao SH, Anuratha KS, Wei SY, Lin JY, Hsieh CK. Facile and Rapid Electrochemical Conversion of Ni into Ni(OH) 2 Thin Film as the Catalyst for Direct Growth of Carbon Nanotubes on Ni Foam for Supercapacitors. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:3867. [PMID: 36364643 PMCID: PMC9653567 DOI: 10.3390/nano12213867] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Revised: 10/25/2022] [Accepted: 10/27/2022] [Indexed: 06/16/2023]
Abstract
In this paper, a facile and rapid aqueous-based electrochemical technique was used for the phase conversion of Ni into Ni(OH)2 thin film. The Ni(OH)2 thin film was directly converted and coated onto the network surface of Ni foam (NF) via the self-hydroxylation process under alkaline conditions using a simple cyclic voltammetry (CV) strategy. The as-formed and coated Ni(OH)2 thin film on the NF was used as the catalyst layer for the direct growth of carbon nanotubes (CNTs). The self-converted Ni(OH)2 thin film is a good catalytic layer for the growth of CNTs due to the fact that the OH- of the Ni(OH)2 can be reduced to H2O to promote the growth of CNTs during the CVD process, and therefore enabling the dense and uniform CNTs growth on the NF substrate. This binder-free CNTs/NF electrode displayed outstanding behavior as an electric double-layer capacitor (EDLC) due to the large surface area of the CNTs, showing excellent specific capacitance values of 737.4 mF cm-2 in the three-electrode configuration and 319.1 mF cm-2 in the two-electrode configuration, at the current density of 1 mA cm-2 in a 6 M KOH electrolyte. The CNTs/NF electrode also displayed good cycling stability, with a capacitance retention of 96.41% after 10,000 cycles, and this the excellent cycling performance can be attributed to the stable structure of the direct growth of CNTs with a strong attachment to the NF current collector, ensuring a good mechanical and electrical connection between the NF collector and the CNTs.
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Affiliation(s)
- Sheng-Hung Kao
- Department of Materials Engineering, Center for Plasma and Thin Film Technologies, Ming Chi University of Technology, New Taipei City 24301, Taiwan
| | | | - Sung-Yen Wei
- R&D Lab, SulfurScience Technology Co., Ltd., New Taipei City 24301, Taiwan
| | - Jeng-Yu Lin
- Department of Chemical and Materials Engineering, Tunghai University, Taichung City 407224, Taiwan
| | - Chien-Kuo Hsieh
- Department of Materials Engineering, Center for Plasma and Thin Film Technologies, Ming Chi University of Technology, New Taipei City 24301, Taiwan
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15
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Dočkal J, Lísal M, Moučka F. Molecular dynamics of preferential adsorption in mixed alkali–halide electrolytes at graphene electrodes. J Chem Phys 2022; 157:084704. [DOI: 10.1063/5.0097425] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Understanding the microscopic behavior of aqueous electrolyte solutions in contact with graphene and related carbon surfaces is important in electrochemical technologies, such as capacitive deionization or supercapacitors. In this work, we focus on preferential adsorption of ions in mixed alkali–halide electrolytes containing different fractions of Li+/Na+ or Li+/K+ and/or Na+/K+ cations with Cl− anions dissolved in water. We performed molecular dynamics simulations of the solutions in contact with both neutral and positively and negatively charged graphene surfaces under ambient conditions, using the effectively polarizable force field. The simulations show that large ions are often intuitively attracted to oppositely charged electrodes. In contrast, the adsorption behavior of small ions tends to be counterintuitive. In mixed-cation solutions, one of the cations always supports the adsorption of the other cation, while the other cation weakens the adsorption of the first cation. In mixed-cation solutions containing large and small cations simultaneously, adsorption of the larger cations varies dramatically with the electrode charge in an intuitive way, while adsorption of the smaller cations changes oppositely, i.e., in a counterintuitive way. For (Li/K)Cl mixed-cation solutions, these effects allow the control of Li+ adsorption by varying the electrode charge, whereas, for LiCl single-salt solutions, Li+ adsorption is nearly independent of the electrode charge. We rationalize this cation–cation lever effect as a result of a competition between three driving forces: (i) direct graphene–ion interactions, (ii) the strong tendency of the solutions to saturate the network of non-covalent intermolecular bonds, and (iii) the tendency to suppress local charge accumulation in any region larger than typical interparticle distances. We analyze the driving forces in detail using a general method for intermolecular bonding based on spatial distribution functions and different contributions to the total charge density profiles. The analysis helps to predict whether an ion is more affected by each of the three driving forces, depending on the strength of the ion solvation shells and the compatibility between the contributions of the charge density profiles due to the ion and water molecules. This approach is general and can also be applied to other solutions under different thermodynamic conditions.
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Affiliation(s)
- Jan Dočkal
- Department of Physics, Faculty of Science, Jan Evangelista Purkyně University in Ústí nad Labem, Pasteurova 3544/1, 400 96 Ústí nad Labem, Czech Republic and Department of Molecular and Mesoscopic Modelling, The Czech Academy of Sciences, Institute of Chemical Process Fundamentals, Rozvojová 135/1, Prague, Czech Republic
| | - Martin Lísal
- Department of Physics, Faculty of Science, Jan Evangelista Purkyně University in Ústí nad Labem, Pasteurova 3544/1, 400 96 Ústí nad Labem, Czech Republic and Department of Molecular and Mesoscopic Modelling, The Czech Academy of Sciences, Institute of Chemical Process Fundamentals, Rozvojová 135/1, Prague, Czech Republic
| | - Filip Moučka
- Department of Physics, Faculty of Science, Jan Evangelista Purkyně University in Ústí nad Labem, Pasteurova 3544/1, 400 96 Ústí nad Labem, Czech Republic and Department of Molecular and Mesoscopic Modelling, The Czech Academy of Sciences, Institute of Chemical Process Fundamentals, Rozvojová 135/1, Prague, Czech Republic
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16
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Paulista Neto AJ, da Silva DAC, Gonçalves VA, Zanin H, Freitas RG, Fileti EE. An evaluation of the capacitive behavior of supercapacitors as a function of the radius of cations using simulations with a constant potential method. Phys Chem Chem Phys 2022; 24:3280-3288. [PMID: 35048088 DOI: 10.1039/d1cp04350a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report on the atomistic molecular dynamics, applying the constant potential method to determine the structural and electrostatic interactions at the electrode-electrolyte interface of electrochemical supercapacitors as a function of the cation radius (Cs+, Rb+, K+, Na+, Li+). We find that the electrical double layer is susceptible to the size, hydration layer volume, and cations' mobility and analyzed them. Besides, the transient potential shows an increase in magnitude and length as a function of the monocation size, i.e., Cs+ > Rb+ > K+ > Na+ > Li+. On the other hand, the charge distribution along the electrode surface is less uniform for large monocations. Nonetheless, the difference is not observed as a function of the radius of the cation for the integral capacitance. Our results are comparable to studies that employed the fixed charge method for treating such systems.
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Affiliation(s)
- Antenor J Paulista Neto
- Advanced Energy Storage Division, Center for Innovation on New Energies, Carbon Sci-Tech Labs, School of Electrical and Computer Engineering, University of Campinas; Av. Albert Einstein 400, Campinas, SP 13083-852, Brazil.
| | - Débora A C da Silva
- Advanced Energy Storage Division, Center for Innovation on New Energies, Carbon Sci-Tech Labs, School of Electrical and Computer Engineering, University of Campinas; Av. Albert Einstein 400, Campinas, SP 13083-852, Brazil.
| | - Vanessa A Gonçalves
- Institute of Physics & Department of Chemistry, Laboratory of Computational Materials, Federal University of Mato Grosso, 78060-900, Cuiabá, MT, Brazil.
| | - Hudson Zanin
- Advanced Energy Storage Division, Center for Innovation on New Energies, Carbon Sci-Tech Labs, School of Electrical and Computer Engineering, University of Campinas; Av. Albert Einstein 400, Campinas, SP 13083-852, Brazil.
| | - Renato G Freitas
- Institute of Physics & Department of Chemistry, Laboratory of Computational Materials, Federal University of Mato Grosso, 78060-900, Cuiabá, MT, Brazil.
| | - Eudes E Fileti
- Institute of Science and Technology of the Federal University of São Paulo, 12247-014, São José dos Campos, SP, Brazil.
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17
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Nualchimplee C, Jitapunkul K, Deerattrakul V, Thaweechai T, Sirisaksoontorn W, Hirunpinyopas W, Iamprasertkun P. Auto-oxidation of exfoliated MoS 2 in N-methyl-2-pyrrolidone: from 2D nanosheets to 3D nanorods. NEW J CHEM 2022. [DOI: 10.1039/d1nj05384a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
We have therefore introduced a novel preparation route for MoO3 nanorods from exfoliated 2H-MoS2 via the auto-oxidation of a mixture of N-methyl-2-pyrrolidone and water via the sonication-assisted exfoliation of MoS2.
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Affiliation(s)
- Chakrit Nualchimplee
- Department of Applied Physics, Faculty of Sciences and Liberal Arts, Rajamangala University of Technology Isan, Nakhon Ratchasima 30000, Thailand
| | - Kulpavee Jitapunkul
- School of Bio-Chemical Engineering and Technology, Sirindhorn International Institute of Technology, Thammasat University, Pathum Thani 12120, Thailand
| | - Varisara Deerattrakul
- National Nanotechnology Centre (NANOTEC), National Science and Technology Department Agency (NSTDA), Pathum Thani, Thailand
| | | | - Weekit Sirisaksoontorn
- Department of Chemistry and Centre of Excellence for Innovation in Chemistry, Faculty of Science, Kasetsart University, Bangkok 10900, Thailand
| | - Wisit Hirunpinyopas
- Department of Chemistry and Centre of Excellence for Innovation in Chemistry, Faculty of Science, Kasetsart University, Bangkok 10900, Thailand
| | - Pawin Iamprasertkun
- Department of Applied Physics, Faculty of Sciences and Liberal Arts, Rajamangala University of Technology Isan, Nakhon Ratchasima 30000, Thailand
- School of Bio-Chemical Engineering and Technology, Sirindhorn International Institute of Technology, Thammasat University, Pathum Thani 12120, Thailand
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18
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Nomura A, Mizuki E, Ito K, Kubo Y, Yamagishi T, Uejima M. Highly-porous Super-Growth carbon nanotube sheet cathode develops high-power Lithium-Air Batteries. Electrochim Acta 2021. [DOI: 10.1016/j.electacta.2021.139415] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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19
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A Review: Ion Transport of Two-Dimensional Materials in Novel Technologies from Macro to Nanoscopic Perspectives. ENERGIES 2021. [DOI: 10.3390/en14185819] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Ion transport is a significant concept that underlies a variety of technologies including membrane technology, energy storages, optical, chemical, and biological sensors and ion-mobility exploration techniques. These applications are based on the concepts of capacitance and ion transport, so a prior understanding of capacitance and ion transport phenomena is crucial. In this review, the principles of capacitance and ion transport are described from a theoretical and practical point of view. The review covers the concepts of Helmholtz capacitance, diffuse layer capacitance and space charge capacitance, which is also referred to as quantum capacitance in low-dimensional materials. These concepts are attributed to applications in the electrochemical technologies such as energy storage and excitable ion sieving in membranes. This review also focuses on the characteristic role of channel heights (from micrometer to angstrom scales) in ion transport. Ion transport technologies can also be used in newer applications including biological sensors and multifunctional microsupercapacitors. This review improves our understanding of ion transport phenomena and demonstrates various applications that is applicable of the continued development in the technologies described.
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20
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Finney AR, McPherson IJ, Unwin PR, Salvalaglio M. Electrochemistry, ion adsorption and dynamics in the double layer: a study of NaCl(aq) on graphite. Chem Sci 2021; 12:11166-11180. [PMID: 34522314 PMCID: PMC8386640 DOI: 10.1039/d1sc02289j] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2021] [Accepted: 07/14/2021] [Indexed: 12/18/2022] Open
Abstract
Graphite and related sp2 carbons are ubiquitous electrode materials with particular promise for use in e.g., energy storage and desalination devices, but very little is known about the properties of the carbon–electrolyte double layer at technologically relevant concentrations. Here, the (electrified) graphite–NaCl(aq) interface was examined using constant chemical potential molecular dynamics (CμMD) simulations; this approach avoids ion depletion (due to surface adsorption) and maintains a constant concentration, electroneutral bulk solution beyond the surface. Specific Na+ adsorption at the graphite basal surface causes charging of the interface in the absence of an applied potential. At moderate bulk concentrations, this leads to accumulation of counter-ions in a diffuse layer to balance the effective surface charge, consistent with established models of the electrical double layer. Beyond ∼0.6 M, however, a combination of over-screening and ion crowding in the double layer results in alternating compact layers of charge density perpendicular to the interface. The transition to this regime is marked by an increasing double layer size and anomalous negative shifts to the potential of zero charge with incremental changes to the bulk concentration. Our observations are supported by changes to the position of the differential capacitance minimum measured by electrochemical impedance spectroscopy, and are explained in terms of the screening behaviour and asymmetric ion adsorption. Furthermore, a striking level of agreement between the differential capacitance from solution evaluated in simulations and measured in experiments allows us to critically assess electrochemical capacitance measurements which have previously been considered to report simply on the density of states of the graphite material at the potential of zero charge. Our work shows that the solution side of the double layer provides the more dominant contribution to the overall measured capacitance. Finally, ion crowding at the highest concentrations (beyond ∼5 M) leads to the formation of liquid-like NaCl clusters confined to highly non-ideal regions of the double layer, where ion diffusion is up to five times slower than in the bulk. The implications of changes to the speciation of ions on reactive events in the double layer are discussed. CμMD reveals multi-layer electrolyte screening in the double layer beyond 0.6 M, which affects ion activities, speciation and mobility; asymmetric charge screening explains concentration dependent changes to electrochemical properties.![]()
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Affiliation(s)
- Aaron R Finney
- Thomas Young Centre and Department of Chemical Engineering, University College London London WC1E 7JE UK
| | - Ian J McPherson
- Department of Chemistry, University of Warwick Coventry CV4 7AL UK
| | - Patrick R Unwin
- Department of Chemistry, University of Warwick Coventry CV4 7AL UK
| | - Matteo Salvalaglio
- Thomas Young Centre and Department of Chemical Engineering, University College London London WC1E 7JE UK
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21
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22
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Deerattrakul V, Hirunpinyopas W, Pisitpipathsin N, Saisopa T, Sawangphruk M, Nualchimplee C, Iamprasertkun P. The electrochemistry of size dependent graphene via liquid phase exfoliation: capacitance and ionic transport. Phys Chem Chem Phys 2021; 23:11616-11623. [PMID: 33972979 DOI: 10.1039/d1cp00887k] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Recently, graphene-based materials have become ubiquitous in electrochemical devices including electrochemical sensors, electrocatalysts, capacitive and membrane desalination and energy storage devices. However, many of the electrochemical properties of graphene (particularly the capacitance and ionic transport) are not yet fully understood. This paper explores the capacitance and ionic transport properties of size dependent graphene (from 100 nm to 1 μm) prepared through the liquid phase exfoliation of graphite in which the size of graphene was finely selected using a multi-step centrifugation technique. Our experiment was then expanded to include basal plane graphene using highly ordered pyrolytic graphite as a model electrode, describing the assumed theoretical graphene capacitance (quoted as 550 F g-1 or 21 μF cm-2) and the electrochemical surface area of the carbon-based materials. This work improves our understanding of graphene electrochemistry (capacitance and ion transport), which should lead to the continuing development of many high-performance electrochemical devices, especially supercapacitors, capacitive desalination and ion-based selective membranes.
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Affiliation(s)
- Varisara Deerattrakul
- Department of Applied physics, Faculty of Sciences and Liberal Arts, Rajamangala University of Technology Isan, Nakhon Ratchasima 30000, Thailand. and National Nanotechnology Center (NANOTEC), National Science and Technology Development Agency (NSTDA), Pathum Thani 12120, Thailand
| | - Wisit Hirunpinyopas
- Department of Chemistry, Faculty of Science, Kasetsart University, Bangkok 10900, Thailand
| | - Nuttapon Pisitpipathsin
- Department of Applied physics, Faculty of Sciences and Liberal Arts, Rajamangala University of Technology Isan, Nakhon Ratchasima 30000, Thailand.
| | - Thanit Saisopa
- Department of Applied physics, Faculty of Sciences and Liberal Arts, Rajamangala University of Technology Isan, Nakhon Ratchasima 30000, Thailand.
| | - Montree Sawangphruk
- Department of Chemical and Biomolecular Engineering, School of Energy Science and Engineering, and Centre of Excellence for Energy Storage Technology (CEST), Vidyasirimedhi Institute of Science and Technology, Rayong, 21210, Thailand
| | - Chakrit Nualchimplee
- Department of Applied physics, Faculty of Sciences and Liberal Arts, Rajamangala University of Technology Isan, Nakhon Ratchasima 30000, Thailand.
| | - Pawin Iamprasertkun
- Department of Applied physics, Faculty of Sciences and Liberal Arts, Rajamangala University of Technology Isan, Nakhon Ratchasima 30000, Thailand.
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23
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Iamprasertkun P, Hirunpinyopas W, Deerattrakul V, Sawangphruk M, Nualchimplee C. Controlling the flake size of bifunctional 2D WSe 2 nanosheets as flexible binders and supercapacitor materials. NANOSCALE ADVANCES 2021; 3:653-660. [PMID: 36133846 PMCID: PMC9418638 DOI: 10.1039/d0na00592d] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Accepted: 09/30/2020] [Indexed: 05/29/2023]
Abstract
A new approach using graphene as a conductive binder in electrical supercapacitors has recently been proposed. Graphene shows outstanding properties as a conductive binder, and can be used to replace conductive, additive, and polymer binders. However, graphene follows an EDLC behaviour, which may limit its electrochemical performance. In the process described in this work, we introduced WSe2 nanoflakes as a new approach to using pseudocapacitive materials as binders. The WSe2 nanoflakes were produced through liquid phase exfoliation of bulk WSe2, and the flake size was finely selected using a controlled centrifugation speed. The physical and electrochemical properties of the exfoliated WSe2 flakes were analysed; it was found that the smallest flakes (an average flake size of 106 nm) showed outstanding electrochemical properties, expanding our understanding of transition metal dichalcogenide (TMD) materials, and we were able to demonstrate the applicability of using WSe2 as a binder in supercapacitor electrodes. We also successfully replaced conductive additives and polymer binders with WSe2. The overall performance was improved: capacitance was enhanced by 35%, charge transfer resistance reduced by 73%, and self-discharge potential improved by 9%. This study provides an alternative application of using TMD materials as pseudo capacitive binders, which should lead to the continued development of energy storage technology.
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Affiliation(s)
- Pawin Iamprasertkun
- Department of Applied Physics, Faculty of Sciences and Liberal Arts, Rajamangala University of Technology Isan Nakhon Ratchasima 30000 Thailand
- Department of Chemical and Biomolecular Engineering, School of Energy Science and Engineering, Centre of Excellence for Energy Storage Technology (CEST), Vidyasirimedhi Institute of Science and Technology Rayong 21210 Thailand
| | - Wisit Hirunpinyopas
- Department of Chemistry, Faculty of Science, Kasetsart University Bangkok 10900 Thailand
| | - Varisara Deerattrakul
- Department of Chemical Engineering, Faculty of Engineering, Kasetsart University Bangkok 10900 Thailand
| | - Montree Sawangphruk
- Department of Chemical and Biomolecular Engineering, School of Energy Science and Engineering, Centre of Excellence for Energy Storage Technology (CEST), Vidyasirimedhi Institute of Science and Technology Rayong 21210 Thailand
| | - Chakrit Nualchimplee
- Department of Applied Physics, Faculty of Sciences and Liberal Arts, Rajamangala University of Technology Isan Nakhon Ratchasima 30000 Thailand
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24
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Deerattrakul V, Chukchuan A, Thepphankulngarm N, Pornjaturawit J, Vacharameteevoranun N, Chaisuwan T, Kongkachuichay P. Carbon dioxide hydrogenation to methanol over polybenzoxazine-based mesocarbon supported Cu–Zn catalyst. NEW J CHEM 2021. [DOI: 10.1039/d1nj01475g] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Direct methanol production over Cu–Zn/polybenzoxazine-based mesocarbon catalyst.
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Affiliation(s)
- Varisara Deerattrakul
- Department of Chemical Engineering
- Faculty of Engineering
- and Research Network of NANOTEC-KU on NanoCatalysts and NanoMaterials Sustainable Energy and Environment
- Kasetsart University
- Bangkok 10900
| | - Anurak Chukchuan
- Department of Chemical Engineering
- Faculty of Engineering
- and Research Network of NANOTEC-KU on NanoCatalysts and NanoMaterials Sustainable Energy and Environment
- Kasetsart University
- Bangkok 10900
| | - Nattanida Thepphankulngarm
- Department of Chemical Engineering
- Faculty of Engineering
- and Research Network of NANOTEC-KU on NanoCatalysts and NanoMaterials Sustainable Energy and Environment
- Kasetsart University
- Bangkok 10900
| | - Jirayu Pornjaturawit
- Department of Chemical Engineering
- Faculty of Engineering
- and Research Network of NANOTEC-KU on NanoCatalysts and NanoMaterials Sustainable Energy and Environment
- Kasetsart University
- Bangkok 10900
| | - Napas Vacharameteevoranun
- Department of Chemical Engineering
- Faculty of Engineering
- and Research Network of NANOTEC-KU on NanoCatalysts and NanoMaterials Sustainable Energy and Environment
- Kasetsart University
- Bangkok 10900
| | - Thanyalak Chaisuwan
- The Petroleum and Petrochemical College
- Chulalongkorn University
- Bangkok 10330
- Thailand
- Center of Excellence on Petrochemical and Materials Technology
| | - Paisan Kongkachuichay
- Department of Chemical Engineering
- Faculty of Engineering
- and Research Network of NANOTEC-KU on NanoCatalysts and NanoMaterials Sustainable Energy and Environment
- Kasetsart University
- Bangkok 10900
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25
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Festinger N, Lemiesz A, Skowron E, Smarzewska S, Ciesielski W. A Comparison of Edge‐plane and Basal‐plane Pyrolytic Graphite Electrodes towards Sensitive Determination of the Fungicide Mandipropamid. ELECTROANAL 2020. [DOI: 10.1002/elan.202060387] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Natalia Festinger
- University of Lodz, Faculty of Chemistry Department of Inorganic and Analytical Chemistry 12 Tamka Street 91-403 Lodz Poland
| | - Adrianna Lemiesz
- University of Lodz, Faculty of Chemistry Department of Inorganic and Analytical Chemistry 12 Tamka Street 91-403 Lodz Poland
| | - Ewelina Skowron
- University of Lodz, Faculty of Chemistry Department of Inorganic and Analytical Chemistry 12 Tamka Street 91-403 Lodz Poland
| | - Sylwia Smarzewska
- University of Lodz, Faculty of Chemistry Department of Inorganic and Analytical Chemistry 12 Tamka Street 91-403 Lodz Poland
| | - Witold Ciesielski
- University of Lodz, Faculty of Chemistry Department of Inorganic and Analytical Chemistry 12 Tamka Street 91-403 Lodz Poland
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26
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Quadre AB, de Carvalho SJ, Bossa GV. How charge regulation and ion-surface affinity affect the differential capacitance of an electrical double layer. Phys Chem Chem Phys 2020; 22:18229-18238. [PMID: 32776041 DOI: 10.1039/d0cp02360d] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The differential capacitance of an electrical double layer is a topic of great importance to develop more efficient and environment-friendly energy storage devices: electric double layer supercapacitors. In addition to the bare electrostatic interactions, recent experimental and computational studies suggest that electrodes covered by ionizable groups do interact selectively with specific ion types, an effect that can increase the maximal conductivity and voltage of a supercapacitor. Inspired by this, in the present work we investigate how ion-specific non-electrostatic interactions modify the differential capacitance of a flat electrode whose surface is covered by ionizable groups subject to a charge regulation process. The incorporation of hydration interactions by means of ion-specific Yukawa potential into the Poisson-Boltzmann theory allows our model to describe different scenarios of ion-surface affinity and, hence, the selective depletion or accumulation of specific ion types close to a charged surface. We obtained larger capacitance values when considering electrodes that favor the accumulation of cations and the depletion of anions.
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Affiliation(s)
- Amanda B Quadre
- Department of Physics, São Paulo State University (UNESP), Institute of Biosciences, Humanities and Exact Sciences, São José do Rio Preto, SP 15054-000, Brazil.
| | - Sidney J de Carvalho
- Department of Physics, São Paulo State University (UNESP), Institute of Biosciences, Humanities and Exact Sciences, São José do Rio Preto, SP 15054-000, Brazil.
| | - Guilherme Volpe Bossa
- Department of Physics, São Paulo State University (UNESP), Institute of Biosciences, Humanities and Exact Sciences, São José do Rio Preto, SP 15054-000, Brazil.
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27
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Elliott JD, Troisi A, Carbone P. A QM/MD Coupling Method to Model the Ion-Induced Polarization of Graphene. J Chem Theory Comput 2020; 16:5253-5263. [PMID: 32644791 DOI: 10.1021/acs.jctc.0c00239] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We report a new Quantum Mechanical/Molecular Dynamics (QM/MD) simulation loop to model the coupling between the electron and atom dynamics in solid/liquid interfacial systems. The method can describe simultaneously both the quantum mechanical surface polarizability emerging from the proximity to the electrolyte and the electrolyte structure and dynamics. In the current setup, Density Functional Tight Binding calculations for the electronic structure calculations of the surface are coupled with classical molecular dynamics to simulate the electrolyte solution. The reduced computational cost of the QM part makes the coupling with a classical simulation engine computationally feasible and allows simulation of large systems for hundreds of nanoseconds. We tested the method by simulating both a noncharged graphene flake and a noncharged and charged infinite graphene sheet immersed in an NaCl electrolyte solution. We found that, when no bias is applied, ions preferentially remained in solution, and only cations are mildly attracted to the surface of the graphene. This preferential adsorption of cations vs anions seems to persist also when the surface is moderately charged and rules out any substantial ions/surface charge transfer.
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Affiliation(s)
- Joshua D Elliott
- Department of Chemical Engineering and Analytical Science, University of Manchester, Manchester M13 9PL, United Kingdom
| | - Alessandro Troisi
- Department of Chemistry, University of Liverpool, Liverpool L69 7ZD, United Kingdom
| | - Paola Carbone
- Department of Chemical Engineering and Analytical Science, University of Manchester, Manchester M13 9PL, United Kingdom
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28
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Iamprasertkun P, Ejigu A, Dryfe RAW. Understanding the electrochemistry of "water-in-salt" electrolytes: basal plane highly ordered pyrolytic graphite as a model system. Chem Sci 2020; 11:6978-6989. [PMID: 34122994 PMCID: PMC8159404 DOI: 10.1039/d0sc01754j] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Accepted: 06/05/2020] [Indexed: 12/21/2022] Open
Abstract
A new approach to expand the accessible voltage window of electrochemical energy storage systems, based on so-called "water-in-salt" electrolytes, has been expounded recently. Although studies of transport in concentrated electrolytes date back over several decades, the recent demonstration that concentrated aqueous electrolyte systems can be used in the lithium ion battery context has rekindled interest in the electrochemical properties of highly concentrated aqueous electrolytes. The original aqueous lithium ion battery conception was based on the use of concentrated solutions of lithium bis(trifluoromethanesulfonyl)imide, although these electrolytes still possess some drawbacks including cost, toxicity, and safety. In this work we describe the electrochemical behavior of a simple 1 : 1 electrolyte based on highly concentrated aqueous solutions of potassium fluoride (KF). Highly ordered pyrolytic graphite (HOPG) is used as well-defined model carbon to study the electrochemical properties of the electrolyte, as well as its basal plane capacitance, from a microscopic perspective: the KF electrolyte exhibits an unusually wide potential window (up to 2.6 V). The faradaic response on HOPG is also reported using K3Fe(CN)6 as a model redox probe: the highly concentrated electrolyte provides good electrochemical reversibility and protects the HOPG surface from adsorption of contaminants. Moreover, this electrolyte was applied to symmetrical supercapacitors (using graphene and activated carbon as active materials) in order to quantify its performance in energy storage applications. It is found that the activated carbon and graphene supercapacitors demonstrate high gravimetric capacitance (221 F g-1 for activated carbon, and 56 F g-1 for graphene), a stable working voltage window of 2.0 V, which is significantly higher than the usual range of water-based capacitors, and excellent stability over 10 000 cycles. These results provide fundamental insight into the wider applicability of highly concentrated electrolytes, which should enable their application in future of energy storage technologies.
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Affiliation(s)
- Pawin Iamprasertkun
- Department of Chemistry, University of Manchester Oxford Road Manchester M13 9PL UK +44 (0)161-275-4598
- National Graphene Institute, University of Manchester Oxford Road M13 9PL UK
| | - Andinet Ejigu
- Department of Chemistry, University of Manchester Oxford Road Manchester M13 9PL UK +44 (0)161-275-4598
- National Graphene Institute, University of Manchester Oxford Road M13 9PL UK
| | - Robert A W Dryfe
- Department of Chemistry, University of Manchester Oxford Road Manchester M13 9PL UK +44 (0)161-275-4598
- National Graphene Institute, University of Manchester Oxford Road M13 9PL UK
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29
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Deerattrakul V, Panitprasert A, Puengampholsrisook P, Kongkachuichay P. Enhancing the Dispersion of Cu-Ni Metals on the Graphene Aerogel Support for Use as a Catalyst in the Direct Synthesis of Dimethyl Carbonate from Carbon Dioxide and Methanol. ACS OMEGA 2020; 5:12391-12397. [PMID: 32548423 PMCID: PMC7271380 DOI: 10.1021/acsomega.0c01143] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2020] [Accepted: 05/11/2020] [Indexed: 05/19/2023]
Abstract
Graphene has attracted attention because of its interesting properties in catalyst applications including as a catalyst support; however, it is known that the graphene can be restacked, forming a graphite-like structure that leads to poor specific surface area. Hence, the high-porosity graphene aerogel was used as a Cu-Ni catalyst support to produce dimethyl carbonate (DMC) from carbon dioxide and methanol. In this work, we have introduced a new synthesis route, which can improve the dispersion of metal particles on the graphene aerogel support. Cu-Ni/graphene aerogel catalysts were synthesized by a two-step procedure: forming Cu-Ni/graphene aerogel catalysts via hydrothermal reduction and then Cu-Ni loading by incipient wetness impregnation. It is found that the catalyst prepared by the two-step procedure exhibits higher DMC yield (25%) and MeOH conversion (18.5%) than those of Cu-Ni loading only by an incipient wetness impregnation method. The results prove that this new synthesis route can improve the performance of Cu-Ni/graphene aerogel catalysts for DMC production.
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Zhao J, Cheng L, Wang J, Liu Y, Yang J, Xu Q, Chen R, Ni H. Heteroatom-doped carbon nanofilm embedded in highly ordered TiO2 nanotube arrays by thermal nitriding with enhanced electrochemical activity. J Electroanal Chem (Lausanne) 2019. [DOI: 10.1016/j.jelechem.2019.113513] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Zhan C, Cerón MR, Hawks SA, Otani M, Wood BC, Pham TA, Stadermann M, Campbell PG. Specific ion effects at graphitic interfaces. Nat Commun 2019; 10:4858. [PMID: 31649261 PMCID: PMC6813325 DOI: 10.1038/s41467-019-12854-7] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Accepted: 09/30/2019] [Indexed: 11/30/2022] Open
Abstract
Improved understanding of aqueous solutions at graphitic interfaces is critical for energy storage and water desalination. However, many mechanistic details remain unclear, including how interfacial structure and response are dictated by intrinsic properties of solvated ions under applied voltage. In this work, we combine hybrid first-principles/continuum simulations with electrochemical measurements to investigate adsorption of several alkali-metal cations at the interface with graphene and within graphene slit-pores. We confirm that adsorption energy increases with ionic radius, while being highly dependent on the pore size. In addition, in contrast with conventional electrochemical models, we find that interfacial charge transfer contributes non-negligibly to this interaction and can be further enhanced by confinement. We conclude that the measured interfacial capacitance trends result from a complex interplay between voltage, confinement, and specific ion effects-including ion hydration and charge transfer. Understanding aqueous solutions at graphitic interfaces is critical in a wide variety of emerging technologies. Here, the authors unravel specific ion effects at the interface with graphene and within graphene slit-pores by coupling first-principles simulations and electrochemical measurements.
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Affiliation(s)
- Cheng Zhan
- Lawrence Livermore National Laboratory, Livermore, CA, 94550, USA
| | - Maira R Cerón
- Lawrence Livermore National Laboratory, Livermore, CA, 94550, USA
| | - Steven A Hawks
- Lawrence Livermore National Laboratory, Livermore, CA, 94550, USA
| | - Minoru Otani
- National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Umezono, Tsukuba, 305-8568, Japan
| | - Brandon C Wood
- Lawrence Livermore National Laboratory, Livermore, CA, 94550, USA
| | - Tuan Anh Pham
- Lawrence Livermore National Laboratory, Livermore, CA, 94550, USA.
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