Deep eutectic gel electrolyte and preparation method and application thereof

Abstract

The application discloses a deep eutectic gel electrolyte and a preparation method and application thereof, and belongs to the field of battery materials. The raw materials of the deep eutectic gel electrolyte include polymerizable deep eutectic solvents and initiators. The polymerizable deep eutectic solvents are obtained by mixing and heating the following independently stored components: a hydrogen bond donor and a hydrogen bond acceptor, wherein the hydrogen bond acceptor is a metal salt; and the hydrogen bond donor is butanedinitrile and a polymerizable monomer. The preparation method of the deep eutectic gel electrolyte includes the following steps: mixing the raw materials under certain temperature conditions, fully stirring to obtain a gel electrolyte precursor solution, and initiating polymerization under light conditions to obtain the deep eutectic gel electrolyte. The gel electrolyte prepared by the method has high ionic conductivity and a wide electrochemical stability window, and the cycle life of a symmetric battery and a full battery assembled by using the deep eutectic gel electrolyte is obviously improved. Meanwhile, the process flow of preparing a quasi-solid sodium ion battery and a lithium ion battery by using the method is simple, and commercial production can be easily realized.

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