Mechanochemical Synthesis and Electrochemical Properties of LiMn2O4

Heon Jin Choi, Ki Min Lee, Gyeung Ho Kim, June Gunn Lee

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

Spinel LiMn2O4 as a cathode material for lithium secondary batteries has been synthesized by a mechanochemical process, and its electrochemical properties have been characterized. Highly disordered nanocrystalline LiMn2O4 powders have been prepared by the mechanochemical processing of Li2O and MnO2 powder mixtures for 24 h. Electrochemical characterization of mechanochemically processed powder has shown that the intercalation of Li+ takes place with an initial capacity of 167 mA·h/g in the 2.5-4.3 V range and has better capacity retention as compared to the well-ordered crystalline LiMn2O4 powders. The better capacity retention of the mechanochemically processed LiMn2O4 powder may be attributed to the highly disordered structure that could accommodate the Jahn-Teller distortion of the spinel structure during Li+ intercalation around the 3 V region.

Original languageEnglish
Pages (from-to)242-244
Number of pages3
JournalJournal of the American Ceramic Society
Volume84
Issue number1
DOIs
Publication statusPublished - 2001 Jan

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry

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