Electrochemical performance of a newly-designed all-solid-state Li ion battery with a LiNi_1/3Co_1/3Mn_1/3O₂–LiVO₃ mono-particle layered cathode and a lamellar LiVO₃ anode

Abstract

All-solid-state Li ion battery (ASS-LIB) with a LiNi_1/3Co_1/3Mn_1/3O₂–LiVO₃ mono-particle layered (NCMLVO-MPL) cathode was newly developed by blade coating method with a mixture of NCM and deliquescent-LiVO₃ (LVO). The electrode was fabricated by coating the aqueous slurry containing the LiNi_1/3Co_1/3Mn_1/3O₂ (NCM) particles and the liquefied LVO on the Al foil and drying it at low temperature below 150°C. By controlling the gap of blade coater, we successfully fabricated “mono-particle layered structure”, where NCM particles are highly dispersed in the LVO matrix and the thickness was almost same as the diameter of the particles. The ASS-LIB with the NCMLVO-MPL cathode exhibited high discharge retention of 84% after 50 cycles. In the MPL structure, the well-dispersed NCM mono-particles functioned as the ion and electron conductive path in the direction perpendicular to the electrode, which kept charge–discharge capacity during the cycle test. Moreover, the all-solid-state Li ion battery incorporated with the NCMLVO-MPL composite cathode and a lamellar LVO anode was designed, also exhibiting high discharge retention of 92% after 50 cycles.