Cobalt-free O2-type lithium-rich layered oxides

Benoit Mortemard de Boisse, Jeonguk Jang, Masashi Okubo, Atsuo Yamada*

*この研究の対応する著者

研究成果: Article査読

15 被引用数 (Scopus)

抄録

O3-type lithium-rich transition-metal oxides have been attracting interest because of their large specific capacity achieved by additional oxygen-redox reactions. However, their practical application is precluded in part by continuous capacity and voltage fading upon cycling, which mainly originates from layer-to-spinel phase transformation in an O3-type oxide-ion array. In this work, as an attempt to suppress these degradations, we report O2-type cobalt-free lithium-rich layered oxides (Li[Li1/4Mn3/4]O2−Li[Ni1/3Mn2/3]O2 solid solution) which deliver large capacities of 220–250 mAh/g without substantial capacity or voltage fading upon cycling. Our study demonstrates that controlling the O2/O3 polymorphism is a promising approach toward designing large capacity positive electrode materials.

本文言語English
ページ(範囲)A3630-A3633
ジャーナルJournal of the Electrochemical Society
165
16
DOI
出版ステータスPublished - 2018
外部発表はい

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 再生可能エネルギー、持続可能性、環境
  • 表面、皮膜および薄膜
  • 電気化学
  • 材料化学

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