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The review of advances in interfacial electrochemistry in Estonia: electrochemical double layer and adsorption studies for the development of electrochemical devices. J Solid State Electrochem 2022. [DOI: 10.1007/s10008-022-05338-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
AbstractThe electrochemistry nowadays has many faces and challenges. Although the focus has shifted from fundamental electrochemistry to applied electrochemistry, one needs to acknowledge that it is impossible to develop and design novel green energy transition devices without a comprehensive understanding of the electrochemical processes at the electrode and electrolyte interface that define the performance mechanisms. The review gives an overview of the systematic research in the field of electrochemistry in Estonia which reflects on the excellent collaboration between fundamental and applied electrochemistry.
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Ers H, Voroshylova IV, Pikma P, Ivaništšev VB. Double layer in ionic liquids: Temperature effect and bilayer model. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.119747] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Lebedeva O, Kultin D, Kustov L. Electrochemical Synthesis of Unique Nanomaterials in Ionic Liquids. NANOMATERIALS 2021; 11:nano11123270. [PMID: 34947620 PMCID: PMC8705126 DOI: 10.3390/nano11123270] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Revised: 11/24/2021] [Accepted: 11/27/2021] [Indexed: 11/16/2022]
Abstract
The review considers the features of the processes of the electrochemical synthesis of nanostructures in ionic liquids (ILs), including the production of carbon nanomaterials, silicon and germanium nanoparticles, metallic nanoparticles, nanomaterials and surface nanostructures based on oxides. In addition, the analysis of works on the synthesis of nanoscale polymer films of conductive polymers prepared using ionic liquids by electrochemical methods is given. The purpose of the review is to dwell upon an aspect of the applicability of ILs that is usually not fully reflected in modern literature, the synthesis of nanostructures (including unique ones that cannot be obtained in other electrolytes). The current underestimation of ILs as an electrochemical medium for the synthesis of nanomaterials may limit our understanding and the scope of their potential application. Another purpose of our review is to expand their possible application and to show the relative simplicity of the experimental part of the work.
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Affiliation(s)
- Olga Lebedeva
- Department of Chemistry, Lomonosov Moscow State University, 119991 Moscow, Russia; (O.L.); (D.K.)
| | - Dmitry Kultin
- Department of Chemistry, Lomonosov Moscow State University, 119991 Moscow, Russia; (O.L.); (D.K.)
| | - Leonid Kustov
- Department of Chemistry, Lomonosov Moscow State University, 119991 Moscow, Russia; (O.L.); (D.K.)
- N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospect 47, 119991 Moscow, Russia
- Institute of Ecology and Engineering, National Science and Technology University “MISiS”, Leninsky Prospect 4, 119049 Moscow, Russia
- Correspondence: ; Tel.: +7-495-939-5261
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Riedl JC, Sarkar M, Fiuza T, Cousin F, Depeyrot J, Dubois E, Mériguet G, Perzynski R, Peyre V. Design of concentrated colloidal dispersions of iron oxide nanoparticles in ionic liquids: Structure and thermal stability from 25 to 200 °C. J Colloid Interface Sci 2021; 607:584-594. [PMID: 34509733 DOI: 10.1016/j.jcis.2021.08.017] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2021] [Revised: 08/02/2021] [Accepted: 08/03/2021] [Indexed: 11/19/2022]
Abstract
HYPOTHESIS Some of the most promising fields of application of ionic liquid-based colloids imply elevated temperatures. Their careful design and analysis is therefore essential. We assume that tuning the structure of the nanoparticle-ionic liquid interface through its composition can ensure colloidal stability for a wide temperature range, from room temperature up to 200 °C. EXPERIMENTS The system under study consists of iron oxide nanoparticles (NPs) dispersed in ethylmethylimidazolium bistriflimide (EMIM TFSI). The key parameters of the solid-liquid interface, tuned at room temperature, are the surface charge density and the nature of the counterions. The thermal stability of these nanoparticle dispersions is then analysed on the short and long term up to 200 °C. A multiscale analysis is performed combining dynamic light scattering (DLS), small angle X-ray/neutron scattering (SAXS/SANS) and thermogravimetric analysis (TGA). FINDINGS Following the proposed approach with a careful choice of the species at the solid-liquid interface, ionic liquid-based colloidal dispersions of iron oxide NPs in EMIM TFSI stable over years at room temperature can be obtained, also stable at least over days up to 200 °C and NPs concentrations up to 12 vol% (≈30 wt%) thanks to few near-surface ionic layers.
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Affiliation(s)
- J C Riedl
- Sorbonne Université, CNRS, Laboratoire PHENIX, 4 place Jussieu, case 51, 75005 Paris, France.
| | - M Sarkar
- Sorbonne Université, CNRS, Laboratoire PHENIX, 4 place Jussieu, case 51, 75005 Paris, France.
| | - T Fiuza
- Sorbonne Université, CNRS, Laboratoire PHENIX, 4 place Jussieu, case 51, 75005 Paris, France; Inst. de Fisica, Complex Fluid Group, Universidade de Brasília, Brasília, Brazil.
| | - F Cousin
- Laboratoire Léon Brillouin, UMR 12 CNRS-CEA, CEA-Saclay, 91191 Gif-sur-Yvette, France.
| | - J Depeyrot
- Inst. de Fisica, Complex Fluid Group, Universidade de Brasília, Brasília, Brazil
| | - E Dubois
- Sorbonne Université, CNRS, Laboratoire PHENIX, 4 place Jussieu, case 51, 75005 Paris, France.
| | - G Mériguet
- Sorbonne Université, CNRS, Laboratoire PHENIX, 4 place Jussieu, case 51, 75005 Paris, France.
| | - R Perzynski
- Sorbonne Université, CNRS, Laboratoire PHENIX, 4 place Jussieu, case 51, 75005 Paris, France.
| | - V Peyre
- Sorbonne Université, CNRS, Laboratoire PHENIX, 4 place Jussieu, case 51, 75005 Paris, France.
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Voroshylova IV, Ers H, Docampo-Álvarez B, Pikma P, Ivaništšev VB, Cordeiro MNDS. Hysteresis in the MD Simulations of Differential Capacitance at the Ionic Liquid-Au Interface. J Phys Chem Lett 2020; 11:10408-10413. [PMID: 33253582 DOI: 10.1021/acs.jpclett.0c03212] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
In this Letter, we report the first observation of the capacitance-potential hysteresis at the ionic liquid | electrode interface in atomistic molecular dynamics simulations. While modeling the differential capacitance dependence on the potential scan direction, we detected two long-living types of interfacial structure for the BMImPF6 ionic liquid at specific charge densities of the gold Au(111) surface. These structures differ in how counterions overscreen the surface charge. The high barrier for the transition from one structure to another slows down the interfacial restructuring process and leads to the marked capacitance-potential hysteresis.
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Affiliation(s)
- Iuliia V Voroshylova
- LAQV@REQUIMTE, Department of Chemistry and Biochemistry, Faculty of Sciences, University of Porto, Rua do Campo Alegre s/n, 4169-007 Porto, Portugal
| | - Heigo Ers
- Institute of Chemistry, University of Tartu, Ravila 14a, Tartu 50411, Estonia
| | | | - Piret Pikma
- Institute of Chemistry, University of Tartu, Ravila 14a, Tartu 50411, Estonia
| | | | - M Natália D S Cordeiro
- LAQV@REQUIMTE, Department of Chemistry and Biochemistry, Faculty of Sciences, University of Porto, Rua do Campo Alegre s/n, 4169-007 Porto, Portugal
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Riedl JC, Akhavan Kazemi MA, Cousin F, Dubois E, Fantini S, Loïs S, Perzynski R, Peyre V. Colloidal dispersions of oxide nanoparticles in ionic liquids: elucidating the key parameters. NANOSCALE ADVANCES 2020; 2:1560-1572. [PMID: 36132302 PMCID: PMC9419491 DOI: 10.1039/c9na00564a] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2019] [Accepted: 01/15/2020] [Indexed: 06/12/2023]
Abstract
The combination of ionic liquid and nanoparticle properties is highly appealing for a number of applications. However, thus far there has been limited systematic exploration of colloidal stabilisation in these solvents, which provides an initial direction towards their employment. Here, we present a new and comprehensive study of the key parameters affecting the colloidal stability in dispersions of oxide nanoparticles in ionic liquids. Twelve diverse and representative ionic liquids are used to disperse iron oxide nanoparticles. The liquid interface of these nanoparticles has been carefully tuned in a molecular solvent before transferring into an ionic liquid, without passing through the powder state. Multiscale-characterisation is applied, on both the micro and the nano scale, incorporating both small angle X-ray scattering and dynamic light scattering. The results show the surface charge of the nanoparticles to be a crucial parameter, controlling the layering of the surrounding ionic liquid, and hence producing repulsion allowing efficient counterbalancing of the attractive interactions. For intermediate charges the strength of the repulsion depends on the specific system causing varying levels of aggregation or even none at all. Several samples consist of sufficiently repulsive systems leading to single dispersed nanoparticles, stable in the long term. Thanks to the magnetic properties of the chosen iron oxide nanoparticles, true ferrofluids are produced, appropriate for applications using magnetic fields. The strength and breadth of the observed trends suggests that the key parameters identified here can be generalised to most ionic liquids.
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Affiliation(s)
- J C Riedl
- Sorbonne Université, Laboratoire PHENIX 4 place Jussieu, case 51 75005 Paris France
| | - M A Akhavan Kazemi
- Sorbonne Université, Laboratoire PHENIX 4 place Jussieu, case 51 75005 Paris France
| | - F Cousin
- Laboratoire Léon Brillouin, UMR 12, CNRS-CEA, CEA-Saclay 91191 Gif-sur-Yvette France
| | - E Dubois
- Sorbonne Université, Laboratoire PHENIX 4 place Jussieu, case 51 75005 Paris France
| | - S Fantini
- Solvionic SA 195 route d'Espagne, BP1169 31036 Toulouse Cedex 1 France
| | - S Loïs
- Solvionic SA 195 route d'Espagne, BP1169 31036 Toulouse Cedex 1 France
| | - R Perzynski
- Sorbonne Université, Laboratoire PHENIX 4 place Jussieu, case 51 75005 Paris France
| | - V Peyre
- Sorbonne Université, Laboratoire PHENIX 4 place Jussieu, case 51 75005 Paris France
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Voroshylova IV, Lembinen M, Ers H, Mišin M, Koverga VA, Pereira CM, Ivaništšev VB, Cordeiro MND. On the role of the surface charge plane position at Au(hkl)–BMImPF6 interfaces. Electrochim Acta 2019. [DOI: 10.1016/j.electacta.2019.05.058] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Yu Z, Fang C, Huang J, Sumpter BG, Qiao R. Solvate Ionic Liquids at Electrified Interfaces. ACS APPLIED MATERIALS & INTERFACES 2018; 10:32151-32161. [PMID: 30156822 DOI: 10.1021/acsami.8b10387] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Solvate ionic liquids (SILs) are a promising electrolyte for Li-ion batteries; thus, their behavior at electrified interfaces is crucial for the operation of these batteries. We report molecular dynamics simulation results for a prototypical SIL of lithium triglyme bis(trifluoromethanesulfonyl)imide ([Li(G3)][TFSI]) sandwiched between electrified surfaces. At negatively charged as well as neutral electrodes, the electrolyte largely maintains the characteristics of SILs in terms of the interfacial Li+ ions' coordination by a similar number of oxygen atoms on G3 ligands as the bulk Li+ ions. The persistence of the complex ions is attributed to the 1:1 Li-G3 ratio in bulk SILs and the fact that G3 molecules readily adapt to the interfacial environment by aligning themselves with the surface to ensure good solvation of the interfacial Li+ ions. Nevertheless, the interfacial Li+ ions also display changes of solvation from that in bulk SIL by deviating from the molecular plane formed by the oxygen atoms on G3 ligands as electrodes become more negatively charged. Using density functional theory along with natural bond orbital calculations, we examine the effects of such structural distortion on the properties of the complex cation. Both the frontier orbital energies of the complex cation and the donor-acceptor interactions between Li+ ions and G3 ligands are found to be dependent on the deviation of Li+ ions from the molecular plane of the G3 ligands, which suggests that the electrochemical reduction of Li+ ions should be facilitated by the structural distortion. These results bear important implications for the nanostructures and properties of SILs near electrified interfaces during actual operations of Li-ion batteries and serve to provide guidance toward the rational design of new SIL electrolytes.
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Affiliation(s)
- Zhou Yu
- Department of Mechanical Engineering , Virginia Tech , Blacksburg , Virginia 24061 , United States
| | - Chao Fang
- Department of Mechanical Engineering , Virginia Tech , Blacksburg , Virginia 24061 , United States
| | - Jingsong Huang
- Center for Nanophase Materials Sciences and Computational Sciences & Engineering Division , Oak Ridge National Laboratory , Oak Ridge , Tennessee 37831 , United States
| | - Bobby G Sumpter
- Center for Nanophase Materials Sciences and Computational Sciences & Engineering Division , Oak Ridge National Laboratory , Oak Ridge , Tennessee 37831 , United States
| | - Rui Qiao
- Department of Mechanical Engineering , Virginia Tech , Blacksburg , Virginia 24061 , United States
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