Electrochemical properties of all-solid-state batteries with ZrO2-coated LiNi1/3Mn1/3Co1/3O2 as cathode materials

► ZrO2-coated LiNi1/3Mn1/3Co1/3O2 powders were prepared by a sol-gel method. ► All-solid state lithium battery was fabricated with the ZrO2-coated NMC powders. ► The battery showed discharge capacity of 115mAhg-1 at 0.1 mAcm-2 at room temperature. ► The battery also showed good capacity retention even after 50 cycles.