Application of the Mott-Schottky model to select potentials for EIS studies on electrodes for electrochemical charge storage
Autor: | M. F. Montemor, Alberto Adán-Más, Liliane Guerlou-Demourgues, T.M. Silva |
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Přispěvatelé: | Centro de Quimica Estrutural (CQE), Instituto Superior Técnico, Universidade Técnica de Lisboa (IST), Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB), Université de Bordeaux (UB)-Institut Polytechnique de Bordeaux-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Instituto Superior de Engenharia de Lisboa (ISEL), Réseau sur le stockage électrochimique de l'énergie (RS2E), Université de Nantes (UN)-Aix Marseille Université (AMU)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Collège de France (CdF (institution))-Université de Picardie Jules Verne (UPJV)-Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Ecole Nationale Supérieure de Chimie de Paris - Chimie ParisTech-PSL (ENSCP), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Pau et des Pays de l'Adour (UPPA)-Institut de Chimie du CNRS (INC)-Université de Montpellier (UM)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA)-Université Grenoble Alpes (UGA), This work has been performed in scope of International Doctoral Program in Functional Materials (IDS-FunMat, Erasmus Mundus) and funded by the European Union. We would like to express our gratitude to the Fundação para a Ciência e Tecnologia (FCT) for the funding under the contracts M-ERA.NET/0004/2014 and UID/QUI/00100/2013t. We would also like to acknowledge the team at Plateforme Aquitaine de Caractérisation des Matériaux, PLACAMAT for their general assistance and, finally, Stephane Le Blond de Plouy (Centre de MicroCaractérisation Raimond Castaing) for the SEM image., Université de Picardie Jules Verne (UPJV)-Institut de Chimie du CNRS (INC)-Aix Marseille Université (AMU)-Université de Pau et des Pays de l'Adour (UPPA)-Université de Nantes (UN)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Ecole Nationale Supérieure de Chimie de Paris - Chimie ParisTech-PSL (ENSCP), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Collège de France (CdF (institution))-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA)-Université Grenoble Alpes (UGA)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM) |
Jazyk: | angličtina |
Rok vydání: | 2018 |
Předmět: |
Supercapacitor
Resistive touchscreen Working electrode Materials science Armazenamento de carga electroquímica General Chemical Engineering Nickel-cobalt hydroxide Nanotechnology [CHIM.MATE]Chemical Sciences/Material chemistry 02 engineering and technology Hidróxido de níquel-cobalto 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences Espectroscopia de impedância eletroquímica Energy storage 0104 chemical sciences Dielectric spectroscopy Electrode Pseudocapacitor Charge storage 0210 nano-technology Electrochemical impedance spectroscopy |
Zdroj: | Repositório Científico de Acesso Aberto de Portugal Repositório Científico de Acesso Aberto de Portugal (RCAAP) instacron:RCAAP Electrochimica Acta Electrochimica Acta, 2018, 289, pp.47-55. ⟨10.1016/j.electacta.2018.08.077⟩ Electrochimica Acta, Elsevier, 2018, 289, pp.47-55. ⟨10.1016/j.electacta.2018.08.077⟩ |
ISSN: | 0013-4686 |
Popis: | International audience; Electrochemical Impedance Spectroscopy (EIS) is a powerful technique to understand the electrode-electrolyte interaction and to evaluate degradation, resistive behaviour and electrochemical activity of energy storage materials used in batteries, pseudocapacitors and supercapacitors among others. However, it can sometimes be misused or under-interpreted. To effectively acquire EIS results, the voltages imposed to the working electrode at which EIS spectra are obtained, shall be critically selected. This work follows a previous study on the EIS response of Nickel-Cobalt hydroxide, and highlights how the Mott-Schottky model can be used as a complementary tool to explain EIS results obtained at different potentials. The Mott-Schottky model is used to understand further the fundamental processes occurring at the electrode-electrolyte interface of nickel-cobalt hydroxide in alkali media and to explain the changes in conductivity of the material that ultimately determine the electrode electrochemical activity. The applicability of the model to assist in the potential selection for EIS studies on other important charge storage materials such as MnOx and MoOx is discussed too. |
Databáze: | OpenAIRE |
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