Electrolyte properties of 1-alkyl-2,3,5-trimethylpyrazolium cation-based room-temperature ionic liquids for lithium secondary batteries

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• 作者：Shiro Seki ; Takeshi Kobayashi ; Nobuyuki Serizawa ; Yo Kobayashi ; Katsuhito Takei ; Hajime Miyashiro ; Kikuko Hayamizu ; Seiji Tsuzuki ; Takushi Mitsugi ; Yasuhiro Umebayashi ; Masayoshi Watanabe
• 关键词：Lithium secondary battery ; Room-temperature ionic liquid ; Physicochemical properties ; Electrode ; Interface
• 刊名：Journal of Power Sources
• 出版年：2010
• 出版时间：15 September 2010
• 年：2010
• 卷：195
• 期：18
• 页码：6207-6211
• 全文大小：603 K

文摘

The physicochemical and electrochemical properties of three 1-alkyl-2,3,5-trimethylpyrazolium cation-based room-temperature ionic liquids with various alkyl chain lengths were investigated. The temperature dependences of density, viscosity, and ionic conductivity were obtained by precise measurements. Electrolyte properties of these room-temperature ionic liquids were also examined from the viewpoint of their uses in lithium secondary batteries ([LiCoO₂ positive electrodeelectrolytelithium metal negative electrode]). It was found that the alkyl chain length affects the charge–discharge performances of cells.