Three-dimensional macroporous composite solid electrolyte membrane for all-solid-state lithium battery

• Main Authors: ZHAO NINGBO, ZHANG DEQUAN, FU YUE, XU YONGQIANG, SONG SHIDONG, MEI DONGHAI, QIN XUHUI, YIN FANGFANG, LI WANJUN
• Format: Patent
• Language: Chinese; English
• Published: 13.10.2020
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The invention relates to design and preparation of a composite solid electrolyte membrane for an all-solid-state lithium battery. The preparation method comprises the following steps: preparing a three-dimensional spherical template, then soaking the prepared three-dimensional spherical template in an inorganic electrolyte solution, and performing drying to obtain the three-dimensional spherical template filled with an inorganic electrolyte; putting the template into a muffle furnace, and performing sintering at high temperature to obtain a three-dimensional macroporous inorganic electrolyte material; and finally, compounding the three-dimensional macroporous inorganic electrolyte material and the organic electrolyte material, filling three-dimensional macropores of the inorganic electrolyte material with the organic electrolyte material, then preparing a membrane by a tape casting, spin coating or casting method, and performing drying after membrane removal to obtain the composite solid electrolyte membrane.