Decomposition reaction of LiPF6-based electrolytes for lithium ion cells

Tetsuya Kawamura, Shigeto Okada, Jun ichi Yamaki

研究成果: Contribution to journalArticle査読

257 被引用数 (Scopus)

抄録

The decomposition of LiPF6 electrolytes with water was studied by measuring the water content after storage. The solvents used were ethylene carbonate (EC) + diethyl carbonate (DEC), EC + dimethyl carbonate (DMC), propylene carbonate (PC) + DEC, and PC + DMC mixed by the volume ratio 1 to 1, respectively. The experimental results were in good agreement with -d[H2O]/dt = k[H2O]2[LiPF6]. We obtained rate constants (k) from this empirical equation, with k increasing in the order of EC + DMC < EC + DEC < PC + DMC < PC + DEC. This order is in inverse proportion to the order of the dielectric constants of these solvents. Nonionized LiPF6 dissociates to PF5 and LiF in organic solvents, and PF5 reacts with water. A solvent with a high dielectric constant increases the ionization of LiPF6, thereby suppressing the reaction with water.

本文言語英語
ページ(範囲)547-554
ページ数8
ジャーナルJournal of Power Sources
156
2
DOI
出版ステータス出版済み - 6 1 2006

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

フィンガープリント

「Decomposition reaction of LiPF<sub>6</sub>-based electrolytes for lithium ion cells」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル