Solid electrolyte/electrode integrated material for solid-state lithium battery as well as preparation method and application of solid electrolyte/electrode integrated material

• Main Authors: YANG TIANXIANG, WU CHAO, YI JINGGUANG, WANG FANG
• Format: Patent
• Language: Chinese; English
• Published: 20.09.2022
• Subjects: APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL; ATOMISING APPARATUS; BASIC ELECTRIC ELEMENTS; ELECTRICITY; MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OFARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES ORRIBBONS; NATURAL OR ARTIFICIAL THREADS OR FIBRES; NOZZLES; PERFORMING OPERATIONS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; SPINNING; SPRAYING APPARATUS; SPRAYING OR ATOMISING IN GENERAL; TEXTILES; TRANSPORTING

The invention relates to a solid electrolyte/electrode integrated material for a solid-state lithium battery and a preparation method and application thereof.The preparation method comprises the steps that electrostatic spinning and electrostatic spraying are adopted, a positive electrode active material and a conductive agent are injected into an electrostatic spinning fiber membrane, a composite positive electrode is obtained, electrostatic spinning continues to be conducted on the composite positive electrode, and a three-dimensional porous fiber membrane frame is obtained; dissolving a lithium salt into a cross-linking monomer, and adding a sulfide electrolyte to obtain a sulfide/polymer composite electrolyte precursor; heating and melting the precursor, pouring the precursor into a three-dimensional porous fiber membrane frame, and uniformly casting to obtain a solid electrolyte layer; and assembling the composite positive electrode, the solid electrolyte and a negative electrode into a battery cell, sea