Electrochemical properties of ZrO2-coated LiNi0.8Co0.2O2 cathode materials

Sang Myoung Lee, Si Hyoung Oh, Jae Pyoung Ahn, Won Il Cho, Ho Jang

Research output: Contribution to journalArticle

46 Citations (Scopus)

Abstract

The effect of a ZrO2 coating on the structure and electrochemical properties of the cathode material LiNi0.8Co0.2O2 was investigated using EPMA, TEM, XRD, and electrochemical impedance spectroscopy (EIS). In particular, we focused on the distribution of the ZrO2 on the particle surface to study the relationship between electrochemical properties of the coated cathode and the distribution of the coating materials in the particle. Based on the results from composition analysis and electrochemical tests, it was found that the coating layer consisted of nano-sized ZrO2 particles attached nonuniformly to the particle surface and the ZrO2 layer significantly improved the electrochemical properties of the cathode by suppressing the impedance growth at the interface between the electrodes and the electrolyte.

Original languageEnglish
Pages (from-to)1334-1339
Number of pages6
JournalJournal of Power Sources
Volume159
Issue number2
DOIs
Publication statusPublished - 2006 Sep 22

Keywords

  • Coating
  • LiNiCoO
  • Lithium ion batteries
  • Zirconium oxide

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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