Aqueous metal ion battery negative electrode with gel electrolyte interface and preparation method of aqueous metal ion battery negative electrode

The invention relates to the technical field of battery materials, in particular to an aqueous metal ion battery negative electrode with a gel electrolyte interface and a preparation method. The preparation method comprises the following steps: fully dissolving a gel electrolyte precursor in deionized water, and pouring into an electrolytic tank; taking a metal foil as a working electrode and an inert current collector as a counter electrode, and carrying out direct-current electrodeposition under the condition of constant current density, so that metal ions and gel electrolyte precursor molecules are subjected to chelation cross-linking reaction to form gel electrolyte attached to the surface of the metal foil; and alternately cleaning with deionized water and a metal ion solution to obtain the aqueous metal ion battery negative electrode. The aqueous metal ion battery negative electrode with the gel electrolyte interface prepared by the method can be used for assembling an aqueous zinc ion battery with high