アニオンの複合化による常温溶融塩の電気化学的安定性の改善

Translated title of the contribution: The Improvement of the Electrochemical Stability of Room-temperature Molten Salt by Dual Anion System

江頭 港, 岡田 重人, 山木 凖一

Research output: Contribution to journalArticle

Abstract

For a wider application in batteries and electrochemical capacitors, an improvement of the electrochemical stability of imidazolium cation - based room - temperature molten salt is required. We found that a certain type of combination of anions can change the anodic stability and other properties of molten salt systems. The 1:1 mixture of 1-ethyl-3-methyl imidazolium (EMI) tetrafluoroborate and EMI bis(trifluoromethylsulphonyl)imide (TFSI) showed a similar anodic stability to that of EMITFSI, the most anodically stable single anion molten salt. This effect may originate from the difference of association of both cation and neighborhood anions. A molten salt which has BF^-_4 and TFSI^- anions has a high stability toward an anodic oxidation and provides the highest energy density double-layer capacitor in this study by enlarging the cell voltage.
Translated title of the contributionThe Improvement of the Electrochemical Stability of Room-temperature Molten Salt by Dual Anion System
Original languageJapanese
Pages (from-to)127-131
Number of pages5
JournalThe Reports of Institute of Advanced Material Study,Kyushu University
Volume14
Issue number2
DOIs
Publication statusPublished - 2000

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