Ceramic electrolyte and manufacturing method thereof, and all-solid-state lithium metal battery and preparation method thereof

• Main Authors: KANG FEIYU, BIAO JIE, WANG CUICUI, JIANG KELIN, LYU WEI, HE YANBING, MA JIABIN, CHEN LIKUN, MI JINSHUO, YANG KE
• Format: Patent
• Language: Chinese; English
• Published: 02.05.2023
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The invention provides a ceramic electrolyte and a manufacturing method thereof, and an all-solid-state lithium metal battery and a preparation method thereof, and the manufacturing method of the ceramic electrolyte comprises the following steps: dispersing a lithium source crystal, a garnet type solid electrolyte, a low-melting-point ionic crystal and alumina in a solvent, and carrying out ball milling until particles are refined and uniformly dispersed to obtain a dispersion liquid; removing the solvent in the dispersion liquid to obtain uniformly mixed composite powder; treating the composite powder to enable the particle size of the composite powder to be uniform, and cold-pressing the obtained composite powder with the uniform particle size into sheets; putting the sheet body and powder formed by mixing garnet type solid electrolyte and lithium source crystals into a container, embedding the sheet body with the powder, and sintering the container in a heating device; and cooling to room temperature to ob