Composition controlled LiCoO2 epitaxial thin film growth by pulsed laser deposition

Tsuyoshi Ohnishi, Kazunori Nishio, Kazunori Takada

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    1 Citation (Scopus)

    Abstract

    LiCoO2thin films were epitaxially grown by pulsed laser deposition (PLD). PLD is widely used to form complex oxide thin films due to the relatively small deviation in cationic composition between the target and the film. The deviation highly depends on the ablation laser conditions, and it greatly affects the quality of the epitaxial LiCoO2 thin films. Furthermore, relatively lower oxygen pressure was found to result in higher quality LiCoO2 thin films with suppressed impurity phases, although much higher oxygen pressure had been often used to avoid the formation of a lower valence state Co3O4 as an impurity. In other words, gas pressure also affects the composition in the case of lithium compounds, because lithium is even lighter than oxygen. The results clearly indicate that the difference in the composition between the target and the film is controllable by adjusting these parameters. In this study, we demonstrated the high-rate epitaxial growth of stoichiometric LiCoO2 films by using a lithium-enriched target through composition control.

    Original languageEnglish
    Title of host publicationOxide-Based Materials and Devices VI
    EditorsFerechteh H. Teherani, David C. Look, David J. Rogers
    PublisherSPIE
    ISBN (Electronic)9781628414547
    DOIs
    Publication statusPublished - 2015 Jan 1
    EventOxide-Based Materials and Devices VI - San Francisco, United States
    Duration: 2015 Feb 82015 Feb 11

    Publication series

    NameProceedings of SPIE - The International Society for Optical Engineering
    Volume9364
    ISSN (Print)0277-786X
    ISSN (Electronic)1996-756X

    Other

    OtherOxide-Based Materials and Devices VI
    CountryUnited States
    CitySan Francisco
    Period15/2/815/2/11

    Keywords

    • LiCoO
    • all solid-state Li-ion battery
    • cathode active material
    • epitaxial thin film
    • pulsed laser deposition

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Condensed Matter Physics
    • Computer Science Applications
    • Applied Mathematics
    • Electrical and Electronic Engineering

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