JOURNAL OF POWER SOURCES | 卷:269 |
Na[FSA]-[C3C1pyrr][FSA] ionic liquids as electrolytes for sodium secondary batteries: Effects of Na ion concentration and operation temperature | |
Article | |
Ding, Changsheng1  Nohira, Toshiyuki1  Hagiwara, Rika1  Matsumoto, Kazuhiko1  Okamoto, Yu1  Fukunaga, Atsushi2  Sakai, Shoichiro2  Nitta, Koji2  Inazawa, Shinji2  | |
[1] Kyoto Univ, Grad Sch Energy Sci, Sakyo Ku, Kyoto 6068501, Japan | |
[2] Sumitomo Elect Ind Ltd, Elect & Mat R&D Labs, Konohana Ku, Osaka 5540024, Japan | |
关键词: Sodium secondary batteries; Ionic liquids; Viscosity; Ionic conductivity; Na ion concentration; Operation temperature; | |
DOI : 10.1016/j.jpowsour.2014.06.033 | |
来源: Elsevier | |
【 摘 要 】
As electrolytes for sodium secondary batteries operating over a wide temperature range, Na[FSA]-[C(3)C(1)pyrr][FSA] (FSA = bis(fluorosulfonyl)amide, C(3)C(1)pyrr = N-methyl-N-propylpyrrolidinium) ionic liquids have been investigated. The effects of Na ion concentration (0-60 mol% Na[FSA]) and operation temperature (253-363 K) on the viscosity and ionic conductivity and charge discharge performance of Na/Na[FSA]-[C(3)C(1)pyrr][FSA]/NaCrO2 cells are studied. Results show that Na ion concentration strongly affects the rate capability of the cells, and that the best rate capability at 363 K is obtained at 40 mol% Na [FSA]. The operation temperature also significantly influences the charge discharge performance, especially at low temperatures. At operation temperatures below 273 K, 25 mol% Na[FSA] is found to be the optimum Na ion concentration. There exist different optimum ranges of Na ion concentration depending on the operation temperatures. (C) 2014 Elsevier B.V. All rights reserved.
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