Degradation analysis of LiCoO2 positive electrode material of a Li-ion battery using the Li K-edge signal obtained from STEM-EELS measurements

Noboru Taguchi, Hikari Sakaebe, Kuniaki Tatsumi, Tomoki Akita

研究成果: Contribution to journalArticle査読

9 被引用数 (Scopus)

抄録

The Li distribution in positive electrode material (LiCoO2) was observed after a charge-discharge cycling test by analytical transmission electron microscopy (TEM). The electron energy-loss spectroscopy (EELS) imaging method revealed an inhomogeneous Li distribution in the LiCoO2 particles after the charge-discharge cycling test. Using the alternating least-squares (ALS) method for the data matrix of the EELS spectra, we obtained LiCoO2 and Li-poor LiCoO2 spectra from the LiCoO2 particles. Around the degraded LiCoO2 particles, Co3O4 and fluoride components were detected. It is suggested that inhomogeneous electrochemical reactions are one cause of LiCoO2 and electrolyte degradation.

本文言語英語
ページ(範囲)284-288
ページ数5
ジャーナルe-Journal of Surface Science and Nanotechnology
13
DOI
出版ステータス出版済み - 6 13 2015
外部発表はい

All Science Journal Classification (ASJC) codes

  • バイオテクノロジー
  • バイオエンジニアリング
  • 凝縮系物理学
  • 材料力学
  • 表面および界面
  • 表面、皮膜および薄膜

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