The invention relates to a
boron hydride alkene /
polyrotaxane composite interfacial film modified
metal zinc negative
electrode and a preparation method and application thereof, and belongs to the technical field of aqueous
zinc ion battery negative
electrode materials. The modified
metal zinc negative
electrode is composed of
metal zinc and an inorganic-organic composite gel
polymer interfacial film formed on the surface of the metal zinc through crosslinking of
borohydride,
polyrotaxane and
polyacrylamide. The thickness of the interfacial film is 1-1000 [mu] m, and the interfacial film is uniformly modified on the surface of metal zinc through in-situ free
radical polymerization. The inorganic-organic composite interfacial film has excellent
mechanical strength, rich zinc-loving sites and relatively high
ionic conductivity, and can also block direct contact between
aqueous electrolyte and metal zinc, so that zinc
dendrite growth and interface side reactions such as
hydrogen evolution,
corrosion and
passivation can be effectively relieved. The interfacial film can significantly enhance the reversibility and
cycling stability of the zinc negative electrode, the preparation process is simple and efficient, the
operability is strong, and the method is green and safe, and is of great importance to the realization of an environment-friendly and sustainable aqueous
zinc ion battery technology.