Electrochemical properties of nanometer-sized 0.6Li 2MnO 3·0.4LiNi 0.5Mn 0.5O 2 composite powders prepared by flame spray pyrolysis

Jung Hyun Kim, Seung Ho Choi, Mun Yeong Son, Min Ho Kim, Jung Kul Lee, Yun Chan Kang

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Nanometer-sized 0.6Li 2MnO 3·0.4LiNi 0.5Mn 0.5O 2 composite cathode powders are prepared directly by high-temperature flame spray pyrolysis. The precursor powders and the powders post-treated at 800 °C exhibit mixed-layered crystal structures comprising layered Li 2MnO 3 and layered LiNi 0.5Mn 0.5O 2 phases. The discharge capacity of the precursor powders decreased from 193 mAh g -1 to 96 mAh g -1 by the 9th cycle, corresponding to a capacity retention of 49.7%. Post-treatment at 800 °C increases the capacity retention of the post-treated composite powders to 94.6% after 50 cycles, corresponding to a decrease in the discharge capacity from 225 to 213 mAh g -1. The post-treated composite powders that contain a high amount of the Li 2MnO 3 phase have a high initial discharge capacity and good cyclability.

Original languageEnglish
Pages (from-to)331-336
Number of pages6
JournalCeramics International
Volume39
Issue number1
DOIs
Publication statusPublished - 2013 Jan

Keywords

  • Cathode material
  • Composite
  • Nanopowders
  • Spray pyrolysis

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Process Chemistry and Technology
  • Surfaces, Coatings and Films
  • Materials Chemistry

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