Continuous activation of Li2MnO3 component upon cycling in Li1.167Ni0.233Co0.100Mn 0.467Mo0.033O2 cathode material for lithium ion batteries

Seung Ho Yu, Taeho Yoon, Junyoung Mun, Sangjin Park, Yoon Sok Kang, Jin Hwan Park, Seung M. Oh, Yung Eun Sung

Research output: Contribution to journalArticle

95 Citations (Scopus)

Abstract

Li-rich layered cathode materials are very promising candidates for next generation high energy lithium ion batteries. One of the Li-rich layered cathode materials, Li1.167Ni0.233Co0.100Mn 0.467Mo0.033O2 is prepared by a co-precipitation method. In this report, we focus on anomalous changes upon cycling in Li1.167Ni0.233Co0.100Mn 0.467Mo0.033O2 cathode material in a voltage range of 2.0-4.55 V at room temperature. The structural transitions upon cycling are analyzed by ex situ X-ray diffraction. In addition, the changes in local structure during cycling are studied by X-ray absorption near edge structure. With differential capacity plots by controlling the cut-off voltage, the voltage decay during cycling is intensively studied. The continuous activation process of the residual Li2MnO3 component during cycling is correlated with voltage decay during cycling, and increasing capacity during the initial several cycles. Also, the electrochemical performance in Li 1.167Ni0.233Co0.100Mn0.467Mo 0.033O2 cathode material below 4.4 V is discussed. Furthermore, cycle performance is improved by reassembling Li 1.167Ni0.233Co0.100Mn0.467Mo 0.033O2 into another cell after washing.

Original languageEnglish
Pages (from-to)2833-2839
Number of pages7
JournalJournal of Materials Chemistry A
Volume1
Issue number8
DOIs
Publication statusPublished - 2013 Feb 28
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

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