Influences of high deposition rate on LiCoO2 epitaxial films prepared by pulsed laser deposition

Kazunori Nishio, Tsuyoshi Ohnishi, Minoru Osada, Narumi Ohta, Ken Watanabe, Kazunori Takada

    Research output: Contribution to journalArticlepeer-review

    11 Citations (Scopus)

    Abstract

    This study exhibits influence of deposition rate on LiCoO2 epitaxial films prepared by pulsed laser deposition. High deposition rates tend to destabilize trivalent Co, resulting in formation of an oxygen-deficient phase with a rock-salt structure as an impurity in the deposited films. Because the oxygen-deficient phase originates from incomplete oxidation, post-annealing in air eliminates the impurity phase. Moreover, since it also improves the crystallinity of the film, the post-annealing enhances the electrode performance of the LiCoO2 films.

    Original languageEnglish
    Pages (from-to)91-95
    Number of pages5
    JournalSolid State Ionics
    Volume285
    DOIs
    Publication statusPublished - 2016 Feb 1

    Keywords

    • Epitaxial film
    • Lithium cobalt oxide
    • Pulsed laser deposition
    • Thin-film battery

    ASJC Scopus subject areas

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

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