Electrochemical performance of an all-solid-state lithium ion battery with a binder-free lamellar LiVO3 active material layer prepared by liquefaction approach

Abstract Newly designed binder-free lamellar LiVO 3 (LVO) active material layer with superior charge-discharge cycle properties was developed by liquefaction approach. The LVO cathode was fabricated by coating the aqueous cathode slurry containing the liquefied LVO on the Al foil and dried at low temperature below 150 °C. The liquefied LVO High adhesion between the lamellar LVO and Al foil was observed. It was demonstrated that can be formed freely to fit on the shape of an application object by liquefying the LVO. The lamellar LVO cathode exhibited the first charge and discharge capacities as high as the design capacity, and the first coulomb efficiency was approximately 100%. The crystallinity of the LVO decreased with increasing the depth of discharge on the first discharge process. On the other hand, no deterioration of the charge and discharge capacities was confirmed during the charge-discharge cycle test of 50 cycles. From the comparison between the lamellar LVO cathode and the conventional cathode with the LVO particles, the superior cycle properties were attributed to the lamellar structure of the LVO.