In-situ polydioxolame solid electrolyte, solid-state battery and preparation method of in-situ polydioxolame solid electrolyte

• Main Authors: WANG PENGXU, ZHOU YANG, CHAI JIAO, LIAO MINHUI, JIANG XUNCHANG
• Format: Patent
• Language: Chinese; English
• Published: 26.01.2024
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The invention discloses an in-situ polydioxolame solid electrolyte, a solid battery and a preparation method thereof, the solid electrolyte comprises the following raw materials: a dioxolame liquid, a lithium salt, an interface modifier, an initiator and a polyethylene glycol cross-linking agent, and the preparation method of the solid electrolyte comprises the following steps: uniformly mixing the raw materials to obtain a mixed solution; polymerizing the mixed solution at room temperature to form a solid electrolyte; in the mixed solution, the molar ratio of the polymer monomer to the lithium salt is (10-20): 1, the interfacial modifier accounts for 10-30% of the total mass of the mixed solution, and the polyethylene glycol cross-linking agent accounts for 5-10% of the total mass of the mixed solution. According to the invention, the solid electrolyte is improved and is matched with the porous membrane, so that the polydioxolame solid electrolyte can be flatly laid on the pole piece, and the obtained solid-