Cylindrical film air electrode and application thereof in zinc-air battery

Abstract

The invention relates to a cylindrical film air electrode comprising a gas diffusion layer, an electric catalyst layer, a current-collecting net and a battery diaphragm, wherein the gas diffusion layer is used as an outer wall of the cylindrical film air electrode, the bottom center of the cylindrical film air electrode is provided with an air electrode joint. A cylindrical zinc-air battery prepared by the cylindrical film air electrode comprises a battery shell, the cylindrical film air electrode, a zinc electrode and a plastic seal ring, wherein the cylindrical film air electrode is arranged into a cylinder used as the battery shell, the zinc electrode comprises zinc alloy cream and an anode current collecting end, and the anode current collecting end is fixed at the upper end of the battery shell cylinder by the plastic seal ring. The cylindrical film air electrode shortens an air diffusion path and improves electrochemic and dynamic performance of the air electrode, therefore, the zinc-air battery manufactured by adopting the cylindrical film air electrode has the advantages of high energy density, good electrochemic and dynamic performance, smooth discharge curve, long work time, and the like.

Description

technical field [0001] The invention relates to an air electrode and a zinc-air battery, in particular to a cylindrical thin-film air electrode and a cylindrical zinc-air battery made of the cylindrical thin-film air electrode. Background technique [0002] my country is the world's largest battery producer and battery consumer. Mercury-free alkaline zinc-manganese batteries are a new type of disposable batteries that are environmentally friendly, high in capacity, and low in price. They are the fastest growing battery industry in my country in recent years. As one of the industries, the output increases at an average rate of 30%-50% per year, and the number of battery manufacturers has also increased from dozens a few years ago to hundreds now. According to experts' predictions, the mercury-free alkaline zinc-manganese The annual growth rate of batteries will remain around 15-20%. With the continuous increase of battery manufacturers and the continuous expansion of productio...

AI Technical Summary

Problems solved by technology

[0006] The above patents mainly describe the structure of the cylindrical zinc-air battery, battery leakage, alkali creeping, battery sealing and other problems and their solutions, but do not involve the structure of the cylindrical zinc-air battery with high rate discharge and its solution. Manufacturing method; while the material, structural voids and thickness of the gas diffusion layer all affect the oxygen diffusion path and diffusion rate

Therefore, the cylindrical zinc-air batteries of existing reports and published patents have only small current discharge characteristics.

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