The sintering temperature effect on electrochemical properties of limn2o4

Jin Tae Hwang, Sung Bin Park, Chang Kyoo Park, Ho Jang

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

The effect of sintering temperature on the electrochemical property of LiMn2O4 was investigated. Results showed that the particle size was increased at higher sintering temperatures while the initial capacity was decreased after high temperature sintering. Capacity fading, on the other hand, was suppressed at lower sintering temperatures since the sintering at higher temperatures (≥ 800 °C) increased the Mn ions with a lower oxidation state (Mn+3), which induced structural instability during cycling due to dissolution of Mn ions into the electrolyte. In particular, LiMn2O4 sintered above 830 °C showed severe capacity fading (capacity loss was 38% of initial capacity) by lower coulombic efficiency due to the abnormally increased particle size.

Original languageEnglish
Pages (from-to)3952-3958
Number of pages7
JournalBulletin of the Korean Chemical Society
Volume32
Issue number11
DOIs
Publication statusPublished - 2011 Nov 20

Keywords

  • Capacity fading
  • Manganese dissolution
  • Particle size
  • Sintering

ASJC Scopus subject areas

  • Chemistry(all)

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