10.1021/acscombsci.6b00027.s001 Shingo Maruyama Shingo Maruyama Osamu Kubokawa Osamu Kubokawa Kohei Nanbu Kohei Nanbu Kenjiro Fujimoto Kenjiro Fujimoto Yuji Matsumoto Yuji Matsumoto Combinatorial Synthesis of Epitaxial LiCoO<sub>2</sub> Thin Films on SrTiO<sub>3</sub>(001) via On-Substrate Sintering of Li<sub>2</sub>CO<sub>3</sub> and CoO by Pulsed Laser Deposition American Chemical Society 2016 Epitaxial LiCoO 2 film LiCoO 2 bulk ceramics process SrTiO source Li 2 CO 3 capacity deposition substrate PLD 2016-04-28 00:00:00 Journal contribution https://acs.figshare.com/articles/journal_contribution/Combinatorial_Synthesis_of_Epitaxial_LiCoO_sub_2_sub_Thin_Films_on_SrTiO_sub_3_sub_001_via_On_Substrate_Sintering_of_Li_sub_2_sub_CO_sub_3_sub_and_CoO_by_Pulsed_Laser_Deposition/3320494 High-quality single-phase epitaxial LiCoO<sub>2</sub> thin films are synthesized on 0.5 wt % Nb-doped SrTiO<sub>3</sub>(001) substrates by nanoscale alternate deposition of Li<sub>2</sub>CO<sub>3</sub> and CoO as Li and Co sources, respectively, using a combinatorial pulsed laser deposition (PLD) technique. The formation of LiCoO<sub>2</sub> thin films from these two sources results from the sintering reaction between Li<sub>2</sub>CO<sub>3</sub> 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 LiCoO<sub>2</sub> 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 LiCoO<sub>2</sub>.