Improved electrochemical properties of Li(Ni0.7Co 0.3)O2 cathode for lithium ion batteries with controlled sintering conditions

Dae Geun Lee, Ravindra K. Gupta, Yong Soo Cho, Kwang Taek Hwang

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Improved electrochemical properties of Li(Ni0.7Co 0.3)O2 cathode material are reported. Samples were synthesized by the co-precipitation method with various sintering conditions, namely temperature, time and atmosphere. Li(Ni0.7Co 0.3)O2 sintered at 850 °C for 14 h in air exhibited the lowest unit cell volume accompanied with relatively higher values of c/a and I 103/I 104 reflection peaks ratios. This also exhibited superior electrochemical properties, such as high charge-discharge capacity, high Coulombic efficiency, and low irreversible capacity loss. This can be attributed to improved hexagonal ordering, crystallinity and morphology. The electrochemical cell parameters were better than the reported ones, probably due to controlled sintering conditions.

Original languageEnglish
Pages (from-to)671-679
Number of pages9
JournalJournal of Applied Electrochemistry
Volume39
Issue number5
DOIs
Publication statusPublished - 2009 May 1

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All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Electrochemistry
  • Materials Chemistry

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