Electrochemical and physical properties of layered-spinel composite cathode powders prepared by spray pyrolysis

Chul Min Sim, Young Jun Hong, Min Ho Kim, Yong Seung Jang, Byung Kyu Park, Yun Chan Kang

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The xLi2MnO3·(1-x)Li4Mn5O12 (x = 1, 0.5, 0.3, 0) composite cathode powders are prepared by spray pyrolysis. The composite powders before and after post-treatment at 600°C have fine size and aggregated spherical morphologies of the nanometer-sized primary particles irrespective of the compositions of the cathode powders. The initial discharge capacity of the Li2MnO3 component is 258 mAh g-1, in which the Coulombic efficiencyis 85%. The discharge capacity of the Li2MnO3 powders drops from 258 to 115 after 10 cycles. The initial discharge capacities of xLi2MnO3·(1-x)Li4Mn5O 12 composite powders are 225 ,219 and 211 mAh g-1 when the x values are 0.5 ,0.3 and 0. The capacity retentions of the composite powders are 88, 90, and 83 % after 30 cycles when the x values are 0.5, 0.3, and 0.

Original languageEnglish
Pages (from-to)12110-12120
Number of pages11
JournalInternational Journal of Electrochemical Science
Volume7
Issue number12
Publication statusPublished - 2012 Dec 21
Externally publishedYes

Keywords

  • Cathode material
  • Composite material
  • Lithium battery
  • Spray pyrolysis

ASJC Scopus subject areas

  • Electrochemistry

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