Structural study of epitaxial LiCoO2 films grown by pulsed laser deposition on single crystal SrTiO3 substrates

Z. Li, S. Yasui, S. Takeuchi, A. Creuziger, S. Maruyama, A. A. Herzing, I. Takeuchi, L. A. Bendersky

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Epitaxial LiCoO2 (LCO) thin films of different orientations were fabricated by pulsed laser deposition (PLD) in order to model single-crystal behavior of intercalation cathodes during electrochemical reactions. This paper demonstrates that (1) epitaxial growth of LCO on a single crystal Nb-doped SrTiO3 (Nb:STO) of different orientations occurs with a single orientation relationship; (2) surface morphology of the LCO films is established by the morphology of coalescing grains during island growth mode, whereas morphology of the grains can be visualized as different cuts from a cube with low-energy {104}R-LCO surfaces; (3) the films consist of predominately trigonal R-LiCoO2 phase, with a small fraction of the occasionally present cubic c-LixCoO2 phase; (4) cyclic voltammetry measurements have determined rectification at interface between LCO and Nb:STO causing bias on the oxidation part of cycling, thus preventing full cycling.

Original languageEnglish
Pages (from-to)472-482
Number of pages11
JournalThin Solid Films
Volume612
DOIs
Publication statusPublished - 2016 Aug 1

Keywords

  • Epitaxy
  • Li-ion battery
  • Lithium cobalt oxide
  • Lithium-ion battery
  • Pulsed laser deposition
  • Thin films
  • Transmission electron microscopy

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Materials Chemistry

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  • Cite this

    Li, Z., Yasui, S., Takeuchi, S., Creuziger, A., Maruyama, S., Herzing, A. A., Takeuchi, I., & Bendersky, L. A. (2016). Structural study of epitaxial LiCoO2 films grown by pulsed laser deposition on single crystal SrTiO3 substrates. Thin Solid Films, 612, 472-482. https://doi.org/10.1016/j.tsf.2016.05.017