Improved rate capability in a high-capacity layered cathode material via thermal reduction

Ali Abouimrane*, Owen C. Compton, Haixia Deng, Ilias Belharouak, Dimtriy A. Dikin, SonBinh Nguyen, Khalil Amine

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

62 Scopus citations

Abstract

Thermal treatment of the high-capacity integrated-structure cathode material Li2MnO3-LiMO2 (M Mn, Ni, and Co) under a reductive H2 atmosphere was investigated as a means to improve its rate capability when incorporated into a Lithium-ion battery (LIB). The heat-treated electrode, with a composition of Li1.12Mn 0.55Ni0.145Co0.1O2, shows a better coulombic charge-discharge efficiency and a good cycleability than the pristine material. This improvement can be attributed to a reduction in the valence of some Mn ions from 4 to 3, as monitored by X-ray photoelectron spectroscopy.

Original languageEnglish (US)
JournalElectrochemical and Solid-State Letters
Volume14
Issue number9
DOIs
StatePublished - Jul 18 2011

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Materials Science(all)
  • Physical and Theoretical Chemistry
  • Electrochemistry
  • Electrical and Electronic Engineering

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