Electrochemical properties of nanosized LiCrO 2·Li 2MnO 3 composite powders prepared by a new concept spray pyrolysis

You Na Ko, Jung Hyun Kim, Jung Kul Lee, Yun Chan Kang, Jong Heun Lee

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Nanosized LiCrO 2·Li 2MnO 3 composite powders are prepared by a new concept spray pyrolysis. The precursor and post-treated powders have a Li 2CrO 4 impurity introduced by the partial oxidation of LiCrO 2. The powders have a pure layered structure corresponding to the LiCrO 2·Li 2MnO 3 composite after Li 2CrO 4 is removed by washing with distilled water. The real composition of the washed cathode powders is Li 1.18Cr 0.404Mn 0.477O 2. The aggregated post-treated powders are converted into nanosized powders after washing with distilled water; milling is not required for this conversion. The mean size of the nanosized LiCrO 2·Li 2MnO 3 powders is 48 nm. The LiCrO 2·Li 2MnO 3 cathode sample post-treated at 750 °C has initial charge and discharge capacities of 272 and 233 mAh g -1 at a constant current density of 18 mA g -1, respectively. The discharge capacity of the cathode sample post-treated at 750 °C decreases from 233 to 222 mAh g -1 by the 44th cycle, in which the capacity retention is 95%.

Original languageEnglish
Pages (from-to)345-350
Number of pages6
JournalElectrochimica Acta
Volume69
DOIs
Publication statusPublished - 2012 May 1

Keywords

  • Cathode material
  • Lithium battery
  • Lithium rich
  • Nanopowders
  • Spray pyrolysis

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Electrochemistry

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