Preparation method of modified zinc negative electrode and application thereof in aqueous zinc ion battery

Abstract

The application belongs to the technical field of aqueous zinc-ion batteries, and discloses a preparation method of a modified zinc negative electrode, that is, a zinc-hyaluronic acid composite protective film is loaded on the surface of a zinc foil to form the modified zinc negative electrode. Compared with the prior art, the zincophilic groups contained in the composite protective film on the surface of the modified zinc negative electrode can limit the two-dimensional diffusion of zinc ions, thereby inducing the uniform deposition of zinc ions and reducing the growth of dendrites. The protective layer can occupy the hydrogen evolution active sites, inhibit the evolution of hydrogen, and isolate the direct contact between active water molecules and zinc metal, thereby reducing the corrosion of water molecules on the zinc negative electrode. The preparation process of the modified zinc negative electrode is simple in operation, low in cost and easy to realize large-scale production.

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