All solid-state lithium-ion battery produced by pressure-aided co-curing

Abstract

In solid-state lithium-ion battery cells, electrolyte-infiltrated composite electrode includes an electrolyte component consisting of polymer matrix with ceramic nanoparticles embedded in the matrix to form networking structure of electrolyte. The networking structure establishes effective lithium-ion transport pathway in the electrode. Electrolyte-infiltrated composite electrode sheets and solid electrolyte membranes can be used in all solid-state lithium electrochemical pouch and coin cells. Solid-state lithium-ion battery is fabricated by: (a) providing an anode layer; (b) providing a cathode layer; (c) positioning a ceramic-polymer composite electrolyte membrane between the anode layer and the cathode layer to form a laminar battery assembly; (d) applying pressure to the laminar battery assembly; and (e) heating the laminar battery assembly. Pressure-aided co-curing strengthens the contacts between the electrodes and the solid electrolyte membrane thus creating stable electrode-membrane interfaces with fewer porous regions. Lithium electrochemical cells and batteries exhibit excellent rate performance and outstanding stability over wide temperature range.