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Zhou S. On Capacitance and Energy Storage of Supercapacitor with Dielectric Constant Discontinuity. NANOMATERIALS 2022; 12:nano12152534. [PMID: 35893502 PMCID: PMC9330726 DOI: 10.3390/nano12152534] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Revised: 07/15/2022] [Accepted: 07/22/2022] [Indexed: 12/04/2022]
Abstract
The classical density functional theory (CDFT) is applied to investigate influences of electrode dielectric constant on specific differential capacitance Cd and specific energy storage E of a cylindrical electrode pore electrical double layer. Throughout all calculations the electrode dielectric constant varies from 5, corresponding to a dielectric electrode, to εwr= 108 corresponding to a metal electrode. Main findings are summarized as below. (i): By using a far smaller value of the solution relative dielectric constant εr=10, which matches with the reality of extremely narrow tube, one discloses that a rather high saturation voltage is needed to attain the saturation energy storage in the ultra-small pore. (ii): Use of a realistic low εr=10 value brings two obvious effects. First, influence of bulk electrolyte concentration on the Cd is rather small except when the electrode potential is around the zero charge potential; influence on the E curve is almost unobservable. Second, there remain the Cd and E enhancing effects caused by counter-ion valency rise, but strength of the effects reduces greatly with dropping of the εr value; in contrast, the Cd and E reducing effects coming from the counter-ion size enhancing remain significant enough for the low εr value. (iii) A large value of electrode relative dielectric constant εrw always reduces both the capacitance and energy storage; moreover, the effect of the εrw value gets eventually unobservable for small enough pore when the εrw value is beyond the scope corresponding to dielectric electrode. It is analyzed that the above effects take their rise in the repulsion and attraction on the counter-ions and co-ions caused by the electrode bound charges and a strengthened inter-counter-ion electrostatic repulsion originated in the low εr value.
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Affiliation(s)
- Shiqi Zhou
- School of Physics and Electronics, Central South University, Changsha 410083, China
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Zou J, Fan C, Zhang J, Liu X, Zhou W, Huang L, Xu H. Effect of Adsorbent Properties on Adsorption-Induced Deformation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:14813-14822. [PMID: 34910489 DOI: 10.1021/acs.langmuir.1c02512] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Adsorption-induced adsorbent deformation is of fundamental importance to geoscientists and engineers. To gain insight into the deformation behaviors of different materials, we presented grand canonical Monte Carlo (GCMC) simulations of methane adsorption-induced deformation in slit pores. Adsorption isotherms and deformation behaviors of the pores were obtained for adsorbents with variations in solid density and affinity. The results showed that the adsorption-induced deformation depends on adsorbate loading, pore width, solid density, and affinity. The deformation at a given adsorption loading could be comparable between different solid densities or affinities because solid density or affinity is related to the solvation pressure as the driving force behind the deformation and also the resistance of the deformation. The interaction of these two effects controls the deformation behavior. We expect that our results will help to understand the adsorption-induced deformation in solids with heterogeneous properties and estimate deformation using the gas adsorption data.
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Affiliation(s)
- Jie Zou
- State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Chengdu University of Technology, Chengdu 610059, China
- College of Energy, Chengdu University of Technology, Chengdu, Sichuan 610059, China
| | - Chunyan Fan
- WA School of Mines: Minerals, Energy and Chemical Engineering, Curtin University, Bentley 6102, Australia
| | - Junfang Zhang
- CSIRO Energy, 26 Dick Perry Ave, Kensington, WA 6151, Australia
| | - Xiu Liu
- WA School of Mines: Minerals, Energy and Chemical Engineering, Curtin University, Bentley 6102, Australia
| | - Wen Zhou
- College of Energy, Chengdu University of Technology, Chengdu, Sichuan 610059, China
| | - Liang Huang
- College of Energy, Chengdu University of Technology, Chengdu, Sichuan 610059, China
| | - Hao Xu
- State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Chengdu University of Technology, Chengdu 610059, China
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Ledezma Lopez GA, Verstraete JJ, Sorbier L, Glowska A, Leinekugel-Le-Cocq D, Jolimaitre E, Jallut C. Generation of γ-Alumina Digital Twins Using a Nitrogen Porosimetry Simulation. Ind Eng Chem Res 2021. [DOI: 10.1021/acs.iecr.1c02849] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Gabriel Alejandro Ledezma Lopez
- IFP Energies Nouvelles, Rond-point de l’échangeur de Solaize, BP 3, 69360 Solaize, France
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, LAGEPP UMR 5007 43 boulevard du 11 novembre 1918, Villeurbanne, F-69100, France
| | - Jan J. Verstraete
- IFP Energies Nouvelles, Rond-point de l’échangeur de Solaize, BP 3, 69360 Solaize, France
| | - Loïc Sorbier
- IFP Energies Nouvelles, Rond-point de l’échangeur de Solaize, BP 3, 69360 Solaize, France
| | - Aleksandra Glowska
- IFP Energies Nouvelles, Rond-point de l’échangeur de Solaize, BP 3, 69360 Solaize, France
- Centre for Nature Inspired Engineering (CNIE), University College of London, Gower Street, London, WC1E6BT, United Kingdom
| | | | - Elsa Jolimaitre
- IFP Energies Nouvelles, Rond-point de l’échangeur de Solaize, BP 3, 69360 Solaize, France
| | - Christian Jallut
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, LAGEPP UMR 5007 43 boulevard du 11 novembre 1918, Villeurbanne, F-69100, France
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Kolesnikov AL, Budkov YA, Gor GY. Models of adsorption-induced deformation: ordered materials and beyond. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2021; 34:063002. [PMID: 34666316 DOI: 10.1088/1361-648x/ac3101] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2021] [Accepted: 10/19/2021] [Indexed: 06/13/2023]
Abstract
Adsorption-induced deformation is a change in geometrical dimensions of an adsorbent material caused by gas or liquid adsorption on its surface. This phenomenon is universal and sensitive to adsorbent properties, which makes its prediction a challenging task. However, the pure academic interest is complemented by its importance in a number of engineering applications with porous materials characterization among them. Similar to classical adsorption-based characterization methods, the deformation-based ones rely on the quality of the underlying theoretical framework. This fact stimulates the recent development of qualitative and quantitative models toward the more detailed description of a solid material, e.g. account of non-convex and corrugated pores, calculations of adsorption stress in realistic three-dimension solid structures, the extension of the existing models to new geometries, etc. The present review focuses on the theoretical description of adsorption-induced deformation in micro and mesoporous materials. We are aiming to cover recent theoretical works describing the deformation of both ordered and disordered porous bodies.
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Affiliation(s)
- A L Kolesnikov
- Institut für Nichtklassische Chemie e.V., Permoserstr. 15, 04318 Leipzig, Germany
| | - Yu A Budkov
- School of Applied Mathematics, Tikhonov Moscow Institute of Electronics and Mathematics, HSE University, Tallinskaya St. 34, 123458 Moscow, Russia
- G.A. Krestov Institute of Solution Chemistry of the Russian Academy of Sciences, Academicheskaya St. 1, 153045 Ivanovo, Russia
| | - G Y Gor
- Otto H. York Department Chemical and Materials Engineering, New Jersey Institute of Technology, University Heights, Newark, NJ 07102, United States of America
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Maximov MA, Molina M, Gor GY. The effect of interconnections on gas adsorption in materials with spherical mesopores: A Monte Carlo simulation study. J Chem Phys 2021; 154:114706. [PMID: 33752360 DOI: 10.1063/5.0040763] [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
Gas adsorption is a standard method for measuring pore-size distributions of nanoporous materials. This method is often based on assuming the pores as separate entities of a certain simple shape: slit-like, cylindrical, or spherical. Here, we study the effect of interconnections on gas adsorption in materials with spherical pores, such as three-dimensionally ordered mesoporous (3DOm) carbons. We consider interconnected systems with two, four, and six windows of various sizes. We propose a simple method based on the integration of solid-fluid interactions to take into account these windows. We used Monte Carlo simulations to model argon adsorption at the normal boiling point and obtained adsorption isotherms for the range of systems. For a system with two windows, we obtained a remarkably smooth transition from the spherical to cylindrical isotherm. Depending on the size and number of windows, our system resembles both spherical and cylindrical pores. These windows can drastically shift the point of capillary condensation and result in pore-size distributions that are very different from the ones based on a spherical pore model. Our results can be further used for modeling fluids in a system of interconnected pores using Monte Carlo and density functional theory methods.
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Affiliation(s)
- Max A Maximov
- Otto H. York Department of Chemical and Materials Engineering, New Jersey Institute of Technology, 323 Dr. Martin Luther King Jr. Blvd., Newark, New Jersey 07102, USA
| | - Marcos Molina
- Otto H. York Department of Chemical and Materials Engineering, New Jersey Institute of Technology, 323 Dr. Martin Luther King Jr. Blvd., Newark, New Jersey 07102, USA
| | - Gennady Y Gor
- Otto H. York Department of Chemical and Materials Engineering, New Jersey Institute of Technology, 323 Dr. Martin Luther King Jr. Blvd., Newark, New Jersey 07102, USA
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