The characteristics of Li(CoxNi1 - x)O2 cathode powders formed from the fine-sized Co3O4/NiO precursor powders

Seo Hee Ju, Do Youp Kim, Eun Byul Jo, Yun Chan Kang

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Li(CoxNi1 - x)O2 (0 ≤ x ≤ 1) cathode powders were prepared by solid state reaction method using Co3O4/NiO precursor powders obtained by spray pyrolysis. The effect of the ratios of cobalt and nickel components on the characteristics of Co3O4/NiO precursor and Li(CoxNi1 - x)O2 cathode powders were investigated. The Co3O4/NiO precursor powders with the ratios of cobalt and nickel components as 1/0, 0.75/0.25 and 0.5/0.5 had submicron size and regular morphologies. On the other hand, the Co3O4/NiO powders with the high contents of nickel component had aggregated morphologies of submicron size primary powders. The fine-sized precursor powders formed the fine-sized LiCoO2 and Li(Co0.75Ni0.25)O2 cathode powders by solid state reaction with LiOH powders. However, the high contents of the nickel component of the Co3O4/NiO precursor powders formed the Li(CoxNi1 - x)O2 (0 ≤ x ≤ 0.5) cathode powders with aggregated morphologies and large sizes. The discharge capacities of the powders increased with increasing the nickel content into the Li(CoxNi1 - x)O2 cathode powders up to 188 mAh/g.

Original languageEnglish
Pages (from-to)457-462
Number of pages6
JournalJournal of Alloys and Compounds
Volume450
Issue number1-2
DOIs
Publication statusPublished - 2008 Feb 14
Externally publishedYes

Keywords

  • Chemical synthesis
  • Electrode materials
  • Gas-solid reaction

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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