Effects of ratios of Li2MnO3 and Li(Ni 1/3Mn1/3Co1/3)O2 phases on the properties of composite cathode powders in spray pyrolysis

Mun Yeong Son, Young Jun Hong, Seung Ho Choi, Yun Chan Kang

Research output: Contribution to journalArticle

33 Citations (Scopus)

Abstract

Composite cathode powders of xLi2MnO3-(1 - x)Li(Ni1/3Mn1/3Co1/3)O2 (0 ≤ x ≤ 1) are prepared by spray pyrolysis. The BET surface areas of the composite powders post-treated at 800 C are 5, 12, 16, 12, 10, and 4 m2 g -1 for x = 0, 0.2, 0.4, 0.5, 0.8, and 1, respectively. The initial discharge capacities of the pure Li(Ni1/3Co1/3Mn 1/3)O2 and Li2MnO3 powders at a constant current density of 25 mA g-1 between 2.0 and 4.8 V are 219 and 27 mAh g-1, respectively. The initial discharge capacities of the composite cathode powders are 242, 283, 291, and 234 mAh g-1 for x = 0.2, 0.4, 0.5, and 0.8, respectively. The discharge capacity of the 0.5Li 2MnO3-0.5Li(Ni1/3Mn1/3Co 1/3)O2 cathode powder decreases from 291 to 266 mAh g -1 by the 50th cycle, giving a capacity retention of 92%.

Original languageEnglish
Pages (from-to)110-118
Number of pages9
JournalElectrochimica Acta
Volume103
DOIs
Publication statusPublished - 2013 May 17
Externally publishedYes

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Keywords

  • Cathode material
  • Composite material
  • Lithium rich
  • Spray pyrolysis

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Electrochemistry

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