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Dual-Cation Electrolytes for High-Power and High-Energy LTO//AC Hybrid Capacitors

Chikaoka, Yu and Iwama, Etsuro and Ueda, Tsukasa and Miyashita, Natsuki and Seto, Shinichi and Sakurai, Masato and Naoi, Wako and Reid, McMahon Thomas Homer and Simon, Patrice and Naoi, Katsuhiko Dual-Cation Electrolytes for High-Power and High-Energy LTO//AC Hybrid Capacitors. (2020) Journal of Physical Chemistry C, 124 (23). 12230-12238. ISSN 1932-7447

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Official URL: https://doi.org/10.1021/acs.jpcc.0c01916

Abstract

Dual-cation electrolyte systems, which contain two cations [Li+ and spiro-1,1′-bipyrrolidinium (SBP+), are proposed to enhance the power capability of hybrid capacitors composed of thick Li4Ti5O12 (LTO) negative (200 μm) and activated carbon (AC) positive electrodes (400 μm), which thus reduces the resistive overvoltage in the system. Detailed studies of the mass transport properties based on the combination of spectroscopy and electrochemical analysis have shown that the presence of SBP+, despite slower Li+ transport in the electrolyte bulk, further reduces overvoltage associated with migration limitation in the thick LTO electrode macropores. This study on the dual-cation electrolyte quantifies the influence of the addition of a supporting electrolyte and shows interest in SBPBF4 addition for increasing the output power density of hybrid capacitors with a thick electrode configuration.

Item Type:Article
Additional Information:This is an open access article published under an ACS AuthorChoice License, which permits copying and redistribution of the article or any adaptations for non-commercial purposes. It is available at : https://pubs.acs.org/doi/10.1021/acs.jpcc.0c01916?fig=agr1&ref=pdf&#
HAL Id:hal-03052719
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Other partners > Collège de France (FRANCE)
Other partners > Ecole Nationale Supérieure de Chimie de Paris - ENSCP (FRANCE)
Other partners > Ecole Nationale Supérieure de Chimie de Montpellier - ENSCM (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Other partners > Institut polytechnique de Grenoble (FRANCE)
Other partners > K & W Inc. (JAPAN)
Other partners > Sorbonne Université (FRANCE)
Other partners > Tokyo University of Agriculture and Technology - TUAT (JAPAN)
Other partners > Université Grenoble Alpes - UGA (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Other partners > Université de Nantes (FRANCE)
Other partners > Université de Picardie Jules Verne (FRANCE)
Other partners > PSL Research University (FRANCE)
Other partners > Université de Pau et des Pays de l'Adour - UPPA (FRANCE)
Other partners > Université de Haute Alsace - UHA (FRANCE)
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Deposited On:10 Dec 2020 16:04

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