Preparation method of battery zinc negative electrode material

Abstract

The invention relates to the field of batteries, particularly to a preparation method of a battery zinc negative electrode material. The method comprises the following steps: (1) loading carbon and silicon on the surface of nano-zinc oxide, (2) shaping the nano-zinc oxide, (3) cementing a zinc material at normal temperature, (4) carrying out surface modification to aggregate metal ions, and (5) molding the material. According to the invention, generation of dendrites in electrode work can be slowed down, dendrites on the surface of the zinc negative electrode can fall off easily, aggregation of the dendrites is prevented from reducing the electric energy conversion efficiency of the battery, and the battery made of the zinc negative electrode material is stable in discharge and high in current conversion efficiency.

Description

technical field [0001] The invention relates to the field of batteries, in particular to a method for preparing a battery zinc negative electrode material. Background technique [0002] Chemical battery is an important means of energy storage for electric tools, electric vehicles, and power grids. It is a developing energy storage technology and one of the key technologies for smart grids, smart microgrids, and energy Internet. Batteries have good electrical properties, and are easy to be environmentally friendly, clean and pollution-free, so they are highly competitive and have broad application prospects. [0003] Zinc-based batteries are an important branch of chemical storage batteries and a research and development hotspot of chemical power sources. Zinc has abundant reserves, low price, high specific capacity, and the production and use of zinc-based batteries will not pollute the environment. It is a real green battery anode material. Due to these excellent characte...

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Problems solved by technology

[0004] In the current technology, there are many studies on zinc negative electrodes of batteries. For example, the sintering preparation method of a zinc negative electrode material whose patent number is CN201510534765.8 will include a mixture of zinc source and phosphorus source under the protection of protective gas. ℃ ~ 850 ℃, constant temperature reaction 0.5h ~ 48h, after the reaction, after cooling, crushing, to obtain zinc phosphate, zinc pyrophosphate and zinc tripolyphosphate or a mixture of zinc anode materials; but used in its production The source of zinc is single, and too many components are added, resulting in poor discharge stability during use

Another example is a zinc-air battery zinc anode material and its preparation method whose patent number is CN201611191755.X. The dual-functional additive is prepared by adding metal zinc powder, zinc oxide powder, conductive agent and dual-functional additive to a solution containing a binder, ultrasonically dispersing, and then heating and evaporating the solvent under stirring conditions to obtain a zinc negative electrode material, but it focuses on the battery capacity, and there is no targeted design for the impact of the microscopic changes of the zinc negative electrode during battery discharge, which makes the zinc negative electrode easy to crystallize during battery operation, resulting in unsatisfactory discharge effects during battery use.

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