Cathode performance of Co-doped Li 2 O 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 journalArticle

11 Citations (Scopus)

Abstract

A Co-doped Li 2 O (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
Volume164
Issue number4
DOIs
Publication statusPublished - 2017 Jan 1
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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    Kobayashi, H., Hibino, M., Kubota, Y., Ogasawara, Y., Yamaguchi, K., Kudo, T., Okuoka, S. I., Ono, H., Yonehara, K., Sumida, Y., & Mizuno, N. (2017). Cathode performance of Co-doped Li 2 O with specific capacity (400 mAh/g) enhanced by vinylene carbonate Journal of the Electrochemical Society, 164(4), A750-A753. https://doi.org/10.1149/2.1291704jes