Composite material of metal zinc foil and zinc-affinity crystal nucleuses and preparation method and application thereof

Abstract

The invention provides a composite material of metal zinc foil and zinc- affinity crystal nucleuses and a preparation method and application thereof. The preparation of the composite material includesthe steps that metal salt solution is prepared as deposition solution, the metal zinc foil is placed in the deposition solution, and the composite material is obtained after in-situ chemical deposition. The volume of the zinc-affinity crystal nucleuses is smaller, thin crystal nucleuses can evenly cover the surfaces of the zinc foil, the unique structure can effectively inhibit zinc dendrite, furthermore, due to the fact that the thickness of the crystal nucleuses covering the surfaces of the zinc foil is comparatively thin, the zinc electrode reaction surface area is further maintained at alarge extent, so that the adverse impact on zinc negative electrode materials by modification can be prevented, and the circulating performance of a battery can be improved greatly.

Description

technical field [0001] The present invention relates to the field of new energy, in particular to the field of water-based zinc batteries, and more specifically, to a composite material of metal zinc foil and zinc-philic nuclei, as well as its preparation method and application. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] As a common negative electrode material for rechargeable and dischargeable aqueous zinc-based batteries, metal zinc has the advantages of high theoretical specific capacity (820mAh g-1), good ductility, low cost, and good chemical stability, making the water system rechargeable and dischargeable. Zinc-based batteries have great potential for developm...

AI Technical Summary

Problems solved by technology

[0006] The inventors found that although these traditional methods can inhibit the growth of dendrites to a certain extent, the traditional methods cannot effectively control the morphology of the metal deposited on the zinc substrate, and it is difficult to achieve a uniform distribution of the metal on the zinc substrate. , because the zinc negative electrode is coated with metal or covered with a large amount of metal on the surface of the zinc negative electrode, it will affect the normal dissolution of zinc, reduce the reaction surface area of ​​the zinc electrode, easily cause large electrode polarization, and reduce the cycle performance of the battery

In addition, traditional metal additives can only be prepared on a small scale and cannot be prepared on a large scale. At present, there are still limited methods that can be used to inhibit the growth of zinc dendrites and avoid other negative effects in the process of inhibiting dendrites. Materials and methods for suppressing zinc dendrites are highly desirable

Images