A kind of ceramic matrix composite solid electrolyte and preparation method thereof

Abstract

The invention discloses a method for preparing a ceramic-based composite solid electrolyte, which is characterized in that: the specific preparation method is as follows: including the preparation of a gel electrolyte, the preparation of a ceramic-based electrolyte and the preparation of a ceramic-based composite electrolyte, wherein the gel electrolyte Preparation, mix acrylate material, cross-linking agent and electrolyte together, stir evenly; add initiator to the above mixed solution, stir evenly after adding; step 2: preparation of ceramic base electrolyte The base pyrrolidone solvent is made into a solution according to the ratio of mass ratio 1:10-20; the fast ion conductor and the lithium salt are added to the above solution according to the metering ratio, and a uniformly dispersed slurry is obtained through stirring, ultrasonication, etc.; the above slurry Evenly coated on a glass plate, dried at 30-60°C for 24 hours, and then vacuum-dried at 50-60°C for 24 hours to obtain an electrolyte membrane with a thickness of 10-150 μm.

Description

technical field [0001] The invention relates to a solid electrolyte for a lithium battery, relates to a ceramic matrix composite solid electrolyte, and also relates to a preparation method of the ceramic matrix composite solid electrolyte. Background technique [0002] At present, lithium-ion batteries generally use LiPF 6 carbonate solution as an organic liquid electrolyte. Because such batteries contain volatile and flammable liquid organic substances, there are safety hazards such as fire and explosion. Gel electrolytes have similar ionic conductivity to liquid electrolytes, and have high interfacial compatibility with positive and negative electrodes. Compared with liquid electrolytes, gel electrolytes are safer, but they cannot eradicate potential safety hazards. [0003] Among the solid electrolyte materials, there are mainly two types of polymer solid electrolytes and inorganic solid electrolytes. Among them, the polymer solid electrolyte is composed of organic pol...

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Problems solved by technology

[0004] Polymer solid electrolyte has good thermal stability, high safety performance, high electrolyte stability to lithium, and good cycle performance; however, polymer electrolyte has poor ability to wet electrodes, low lithium ion conductivity, and chemical reactions at the interface, etc. Problems Limit Polymer Solid Electrolyte Applications

Inorganic solid electrolytes have high lithium ion conductivity, wide electrochemical window, good thermal stability, and stable interface properties, but the preparation of solid electrolytes is difficult, poor interface contact, poor mechanical properties, and volume during battery cycling Problems such as battery performance attenuation caused by the carbon dioxide effect restrict the development of inorganic solid-state electrolytes

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