Fabrication of LiCoO2 thin films on flexible stainless steel substrate for lithium ion batteries

Chung Ta Ni, Kuan-Zong Fung

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

The LiCoO2 cathode coating on a flexible stainless steel has been successfully formed by using sol-gel process and spin-coating technique. The microstructures and electrochemical performance of this LiCoO2 cathode were characterized by using an X-ray diffractometer (XRD), a scanning electron microscope (SEM) and electrochemical methods. After annealing at ca. 500 °C, the results of XRD showed that the LiCoO2 gel was crystallized and the crystallized thin films show hexagonal phase with a space group R 3- m. When the annealing temperatures kept at 700 °C, the stainless steel substrate was oxidized and subsequently reacted with LiCoO2. Such a reaction also destabilized the structure of LiCoO2. The SEM observation indicated that the average grain size of films increased with increasing temperature and the thickness of spin-coated films is ca. 1-3 μm. The LiCoO2 thin films prepared from sol-gel process and spin-coating exhibit reversible electrochemical behavior of Li+ intercalation and de-intercalation reactions.

Original languageEnglish
Pages (from-to)1230-1233
Number of pages4
JournalSolid State Ionics
Volume179
Issue number21-26
DOIs
Publication statusPublished - 2008 Sep 15

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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