Oxidation Behavior of E1ectrolytes Used in Lithium Ion Batteries

DOI HANDLE Web Site オープンアクセス
  • 江頭 港
    九州大学大学院総合理工学研究科量子プロセス理工学専攻
  • 岡田 重人
    九州大学大学院総合理工学研究科量子プロセス理工学専攻
  • 山木 準一
    九州大学大学院総合理工学研究科量子プロセス理工学専攻

書誌事項

タイトル別名
  • Oxidation Behavior of Electrolytes Used in Lithium

この論文をさがす

抄録

The current-potential relationships for the electrochemical oxidation of organic solvent electrolytes on microelectrodes are confirmed for various lithium salts, namely ${\rm LiClO}_4$, ${\rm LiBF}_4$, ${\rm LiCF}_3{\rm SO}_3$ and ${\rm LiPF}_6$. The oxidation is expected to occur by means of a two stage process; the chemical degradation of the solvent followed by the electrochemical generation of anion radical species, and the direct electrochemical oxidation of the solvent. The dependence of the oxidation current on temperature and the lithium salt concentration confirms this two step reaction feature. In other words, a reaction based on electrochemically generated anion radicals seems to occur below 4.8V vs. Li/Li$^+$ and direct oxidation of the solvent occurs above 4.8V. Above 4.8V, we cannot disregard the distribution of the diffusion-limiting current of the anion radical into the whole oxidation current.

収録刊行物

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ