Measurement of the electrochemical oxidation of organic electrolytes used in lithium batteries by microelectrode

Minato Egashira, Hideki Takahashi, Shigeto Okada, Jun Ichi Yamaki

Research output: Contribution to journalArticle

38 Citations (Scopus)

Abstract

The electrochemical oxidation of organic electrolytes was investigated using microelectrodes. The electrolytes we used were LiClO4/(EC+DEC) and LiPF6(EC+DEC) which are widely employed in lithium ion batteries. We measured the oxidation current by the potential step method (the potential is maintained until the current becomes constant) at potentials ranging from 4.5 to 5.5 V versus Li/Li+. The current density-potential relationship of the oxidation of 1 M LiClO4/(EC+DEC) electrolyte on the carbon microelectrode shows good reproducibility and roughly fits exponential lines. We obtained a similar relationship regardless of the material and size of the microelectrodes. Therefore, the electrochemical oxidation of organic electrolytes can be compared using this method. The different oxidation behavior of LiPF6 salt and LiClO4 salt electrolyte suggests that the salt anions may initiate the electrolyte oxidation.

Original languageEnglish
Pages (from-to)267-271
Number of pages5
JournalJournal of Power Sources
Volume92
Issue number1-2
DOIs
Publication statusPublished - Jan 2001

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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