Cathode performance of Co-doped Li2O with specific capacity (400 mAh/g) enhanced by vinylene carbonate

Hiroaki Kobayashi, Mitsuhiro Hibino, Yuki Kubota, Yoshiyuki Ogasawara, Kazuya Yamaguchi, Tetsuichi Kudo, Shin Ichi Okuoka, Hironobu Ono, Koji Yonehara, Yasutaka Sumida, Noritaka Mizuno

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)


A Co-doped Li2O (CDL) was synthesized using a planetary ball mill and examined as a cathode material for lithium-ion batteries. When vinylene carbonate, which is often employed as an additive in an electrolyte, was used not only as an additive in the electrolyte but also as a treatment agent for CDL, the specific capacity of CDLwas greatly enhanced and the charge-discharge cycles with specific charging and discharging capacities of 400 mAh/g could be repeated for more than 50 times. Co K-edge XANES spectroscopy and quantitative analysis of peroxide species revealed that the redox reactions of cobalt ions, formation/neutralization of O 2p electron holes, and generation/annihilation of peroxide species occurred during the charge-discharge process.

Original languageEnglish
Pages (from-to)A750-A753
JournalJournal of the Electrochemical Society
Issue number4
Publication statusPublished - 2017
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Surfaces, Coatings and Films
  • Electrochemistry
  • Materials Chemistry


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