Combinatorial Synthesis of Epitaxial LiCoO2 Thin Films on SrTiO3(001) via On-Substrate Sintering of Li2CO3 and CoO by Pulsed Laser Deposition

Shingo Maruyama, Osamu Kubokawa, Kohei Nanbu, Kenjiro Fujimoto, Yuji Matsumoto

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

High-quality single-phase epitaxial LiCoO2 thin films are synthesized on 0.5 wt % Nb-doped SrTiO3(001) substrates by nanoscale alternate deposition of Li2CO3 and CoO as Li and Co sources, respectively, using a combinatorial pulsed laser deposition (PLD) technique. The formation of LiCoO2 thin films from these two sources results from the sintering reaction between Li2CO3 and CoO, which is commonly used in a bulk ceramics process, but simultaneously takes place on the substrate during the deposition at a temperature of 550 °C. Electrochemical characterization reveals that the charge/discharge property of LiCoO2 thin films as a cathode is severely sensitive to the nominal Li:Co composition ratio. The best-quality film shows an excellent discharge capacity comparable with the characteristic capacity of LiCoO2.

Original languageEnglish
Pages (from-to)343-348
Number of pages6
JournalACS Combinatorial Science
Volume18
Issue number6
DOIs
Publication statusPublished - 2016 Jun 13

Keywords

  • LiCoO
  • composition spread
  • epitaxial thin film
  • pulsed laser deposition

ASJC Scopus subject areas

  • Chemistry(all)

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