Organic-inorganic composite solid electrolyte, preparation method and application of electrolyte in solid lithium battery

Abstract

The invention discloses an organic-inorganic composite solid electrolyte. The solid electrolyte is characterized by being prepared from an acrylate material, lithium salt, a crosslinking agent, an initiator, a plasticizer, a fast ionic conductor and a porous rigid support material. The preparation method of the inorganic composite solid electrolyte is characterized by comprising steps as follows:mixing the acrylate material with the lithium salt to completely dissolve the lithium salt in acrylate; adding the crosslinking agent and the plasticizer to the mixed solution, and stirring the mixture evenly; adding the fast ionic conductor to the mixed solution, and performing ultrasonic treatment or stirring to disperse the conductor uniformly; adding the initiator to the mixed solution, and performing stirring uniformly; uniformly pouring the mixed solution on the porous rigid support material; performing heating initiation at 60-100 DEG C to enable the acrylate material to be copolymerized with the crosslinking agent to obtain the organic-inorganic composite solid electrolyte. The solid electrolyte has the advantages that the preparation method is simple, the production efficiency ishigh, and the assembled solid lithium battery has lower impedance and higher capacity.

Description

technical field [0001] The present invention relates to a composite solid electrolyte, in particular to an organic-inorganic composite solid electrolyte, and also to a method for preparing an organic-inorganic composite solid electrolyte, in particular to the application of an organic-inorganic composite solid electrolyte in a solid-state lithium battery application. Background technique [0002] Since solid-state electrolytes can fundamentally solve the safety problems of current commercial lithium batteries, solid-state lithium batteries have become a research hotspot in recent years. Common solid electrolytes are divided into polymer solid electrolytes and inorganic solid electrolytes. Polymer solid electrolyte has the advantages of good thermal stability, high stability to lithium, good cycle performance, and can be used to make flexible thin film batteries; but low ionic conductivity, poor electrode wettability, and limited working power make The development and appli...

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Problems solved by technology

Polymer solid electrolyte has the advantages of good thermal stability, high stability to lithium, good cycle performance, and can be used to make flexible thin film batteries; but low ionic conductivity, poor electrode wettability, and limited working power make The development and application of polymer solid-state lithium batteries are subject to

Inorganic solid electrolytes have the advantages of high ionic conductivity, wide electrochemical window, and stable interface, but solid electrolytes are not easy to prepare, have poor interface contact, poor mechanical properties, and are sensitive to water and oxygen, which restrict the application of inorganic solid electrolytes.

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