Compatibility of N-Methyl-N-propylpyrrolidinium Cation Room-Temperature Ionic Liquid Electrolytes and Graphite Electrodes
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- 作者：Shiro Seki ; Yo Kobayashi ; Hajime Miyashiro ; Yasutaka Ohno ; Yuichi Mita ; Nobuyuki Terada Patrick Charest ; Abdelbast Guerfi ; Karim Zaghib
- 刊名：Journal of Physical Chemistry C
- 出版年：2008
- 出版时间：October 23, 2008
- 年：2008
- 卷：112
- 期：42
- 页码：16708-16713
- 全文大小：273K
- 年卷期：v.112,no.42(October 23, 2008)
- ISSN：1932-7455
文摘
To realize high-safety, high-performance lithium ion secondary batteries using room-temperature ionic liquids, we examined [graphite electrode|room-temperature ionic liquid−lithium salt binary electrolyte|lithium metal electrode] cells by varying the cation structure of the room-temperature ionic liquid. In particular, a bis(fluorosulfonyl)imide anion based room-temperature ionic liquid cell showed high charge/discharge capacity and reversibility. By application of electrochemical calorimetric measurements during charge/discharge operation, the formation of a suitable interfacial layer, such as a solid electrolyte interphase between the graphite electrode and the room-temperature ionic liquid−lithium salt binary electrolyte was indicated. Moreover, we found that not only the anion structure but also the cation structure was important for the suitable charge/discharge of the graphite electrode.