LiCo1-xAlxO2 (0 ≤ x ≤ 0.05) cathode powders prepared from the nanosized Co1-xAlxOy precursor powders

Seo Hee Ju, Hee Chan Jang, Yun Chan Kang

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Fine LiCo1-xAlxO2 (0 ≤ x ≤ 0.05) cathode powders were prepared by the solid-state reaction method using nanosized Co1-xAlxOy (0 ≤ x ≤ 0.05) precursor powders with various concentrations of aluminum used as the dopant. The Co1-xAlxOy precursor powders prepared by spray pyrolysis had nanometer size and a regular morphology after post-treatment at 800 °C. The aluminum dopant decreased the mean particle sizes of the Co1-xAlxOy precursor powders and LiCo1-xAlxO2 cathode powders. The mean particle sizes of the LiCoO2 and LiCo0.95Al0.05O2 cathode powders were 1.1 and 0.52 μm, respectively. The initial discharge capacities of the LiCoO2 and LiCo0.99Al0.01O2 cathode powders were 151 and 161 mAh g-1, respectively. The discharge capacity of the LiCoO2 cathode powders after the 50th cycle was 90% of their maximum discharge capacity. However, the discharge capacities of the LiCo0.99Al0.01O2, LiCo0.97Al0.03O2, and LiCo0.95Al0.05O2 cathode powders after the 50th cycle were 91, 84, and 82%, respectively, of their respective maximum discharge capacities.

Original languageEnglish
Pages (from-to)536-541
Number of pages6
JournalMaterials Chemistry and Physics
Volume112
Issue number2
DOIs
Publication statusPublished - 2008 Dec 1
Externally publishedYes

Keywords

  • Ceramics
  • Chemical synthesis
  • Electrical properties

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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