Cobalt-free O2-type lithium-rich layered oxides

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

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)A3630-A3633
JournalJournal of the Electrochemical Society
Volume165
Issue number16
DOIs
Publication statusPublished - 2018
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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