Electrochemical properties of Al/vanadium chloride batteries with AlCl3-1-Ethyl-3-methylimidazolium chloride electrolyte

Koji Suto, Akiyoshi Nakata, Haruno Murayama, Toshiro Hirai, Jun Ichi Yamaki, Zempachi Ogumi

研究成果: ジャーナルへの寄稿学術誌査読

26 被引用数 (Scopus)

抄録

We have studied the electrochemical properties of vanadium chloride in molten salt containing AlCl3 and 1-ethyl-3-methylimmidazolium chloride (EMIC) with a molar ratio of 1.5/1.0 at an ambient temperature using cyclic voltammetry and the X-ray absorption near-edge structure (XANES). Cyclic voltammograms (CVs) of VCl3 contain a pair of oxidation peak at about 1.5 V vs. Al/Al3+ and reduction peak at about 0.9 V vs. Al/Al3+ assigned to the V(3) V(2) reaction and a pair of oxidation peak at about 0.9 V vs. Al/Al3+ and reduction peak at about 0.4 V vs. Al/Al3+ assigned to the V(2) V(0) reaction. The former remains in the CV after reduction and oxidation cycling. On the other hand, the latter disappears from the CV after a couple of cycles. We also investigate the effect of adding fluorobenzene (FB) to the AlCl3-EMIC salts on the solubility and electrochemical properties of VCl3. FB greatly reduces the VCl3 dissolution in the salts and improves capacity retention with reduction and oxidation cycling without change in the reaction process.

本文言語英語
ページ(範囲)A742-A747
ジャーナルJournal of the Electrochemical Society
163
5
DOI
出版ステータス出版済み - 2016

!!!All Science Journal Classification (ASJC) codes

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学
  • 材料化学
  • 表面、皮膜および薄膜
  • 電気化学
  • 再生可能エネルギー、持続可能性、環境

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