title: Combinatorial Synthesis of Epitaxial LiCoO2 Thin Films on SrTiO3(001) via On-Substrate Sintering of Li2CO3 and CoO by Pulsed Laser Deposition.
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.
authors.affiliation: Department of Applied Chemistry, Tohoku University , 6-6-07 Aramaki-Aza-Aoba, Aoba-ku, Sendai, Miyagi 980-8579, Japan.
authors.forename: Shingo
authors.initials: S
authors.lastname: Maruyama
authors.affiliation: Materials and Structure Laboratory, Tokyo Institute of Technology , 8259 Nagatsuta-cho, Aoba-ku, Yokohama, Kanagawa 226-8503, Japan.
authors.forename: Osamu
authors.initials: O
authors.lastname: Kubokawa
authors.affiliation: Department of Pure and Applied Chemistry, Tokyo University of Science , Yamazaki 2641, Noda, Chiba 278-8510, Japan.
authors.forename: Kohei
authors.initials: K
authors.lastname: Nanbu
authors.affiliation: Department of Pure and Applied Chemistry, Tokyo University of Science , Yamazaki 2641, Noda, Chiba 278-8510, Japan.
authors.forename: Kenjiro
authors.initials: K
authors.lastname: Fujimoto
authors.affiliation: Department of Applied Chemistry, Tohoku University , 6-6-07 Aramaki-Aza-Aoba, Aoba-ku, Sendai, Miyagi 980-8579, Japan.|Materials and Structure Laboratory, Tokyo Institute of Technology , 8259 Nagatsuta-cho, Aoba-ku, Yokohama, Kanagawa 226-8503, Japan.
authors.forename: Yuji
authors.initials: Y
authors.lastname: Matsumoto
mesh_terms: D002516:Ceramics / Q000138:chemical synthesis; D003035:Cobalt / Q000737:chemistry*; D020650:Combinatorial Chemistry Techniques / Q000379:methods*; D055664:Electrochemical Techniques; D007834:Lasers; D016651:Lithium Carbonate / Q000737:chemistry; D036103:Nanotechnology; D010087:Oxides / Q000737:chemistry*; D013324:Strontium / Q000737:chemistry*; D014025:Titanium / Q000737:chemistry*
chemical_list: D010087:Oxides; D016651:Lithium Carbonate; D003035:Cobalt; D014025:Titanium; C119252:strontium titanium oxide; C060728:cobalt oxide; D013324:Strontium
keywords: LiCoO2; composition spread; epitaxial thin film; pulsed laser deposition