Application of nonflammable electrolyte with room temperature ionic liquids (RTILs) for lithium-ion cells

Hiroe Nakagawa, Yukiko Fujino, Suguru Kozono, Yoshihiro Katayama, Toshiyuki Nukuda, Hikari Sakaebe, Hajime Matsumoto, Kuniaki Tatsumi

研究成果: ジャーナルへの寄稿学術誌査読

142 被引用数 (Scopus)


A mixture of flammable organic solvent and nonflammable room temperature ionic liquid (RTIL) has been investigated as a new concept electrolyte to improve the safety of lithium-ion cells. This study focused on the use of N-methyl-N-propylpiperidinium bis (trifluoromethanesulfonyl) imide (PP13-TFSI) as the RTIL for the flame-retardant additive. It was found that a carbon negative electrode, both graphite and hard carbon, could be used with the mixed electrolyte. A 383562-size lithium-ion trial cell made with the mixed electrolyte showed good discharge capacity, which was equivalent to a cell with conventional organic electrolyte up to a discharge current rate of complete discharge in 1 h. Moreover, the mixed electrolyte was observed to be nonflammable at ionic liquid contents of 40 mass% or more. Thus the mixed electrolyte was found to realize both nonflammability and the good discharge performance of lithium-ion cells with carbon negative electrodes. These results indicate that RTILs have potential as a flame-retardant additive for the organic electrolytes used in lithium-ion cells.

ジャーナルJournal of Power Sources
出版ステータス出版済み - 12月 6 2007

!!!All Science Journal Classification (ASJC) codes

  • 再生可能エネルギー、持続可能性、環境
  • エネルギー工学および電力技術
  • 物理化学および理論化学
  • 電子工学および電気工学


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