Method for preparing zinc-air battery catalyst of carbon-nitrogen-based iron material

A zinc-air battery, carbon-nitrogen-based technology, applied in the field of electrochemistry, can solve problems such as obvious defects and lack of resources, and achieve the effects of excellent performance, promotion of development, and superior ORR performance

Active Publication Date: 2019-06-28
SHENZHEN NONFEMET TECH
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Problems solved by technology

[0008] For practical applications in fuel cells, platinum-based catalysts are known to have high performance in the oxygen reduction reaction (ORR), but their drawbacks are significant and resources are scarce

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  • Method for preparing zinc-air battery catalyst of carbon-nitrogen-based iron material

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Embodiment Construction

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0026] A zinc-air battery consists of a metallic zinc electrode, a membrane separator, and an air electrode in which an electrolyte is encapsulated. The current is generated by a redox reaction between the gold metal zinc electrode and the air electrode. Different parts of the battery should meet different requirements. Zinc electrodes, which determine battery capacity, should have efficient charging activity and capacity, and be able to maintain capacity over hun...

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Abstract

The invention discloses a method for preparing a zinc-air battery catalyst of a carbon-nitrogen-based iron material. The method comprises a step of obtaining a polypyrrole-iron complex by synthesis, astep of obtaining a bimetallic zeolite imidazole framework nanocrystal by synthesis, a step of obtaining a composite material formed by the synthesizing the bimetallic zeolite imidazole framework nanocrystal and a carbon-nitrogen-based iron material framework, and a step of dissolving a composite material as a catalyst and acetylene black in a solution containing ethanol and Nafion, performing ultrasonic processing to obtain a uniformly dispersed slurry, and uniformly applying the slurry to fiber paper processed by polytetrafluoroethylene to be a positive electrode of a zinc-air battery. Thecatalyst proposed by the invention has excellent ORR performance and excellent OER catalytic activity, the performance of the catalyst is better than the performance of a commercial Pt / C catalyst andis better than that of a bifunctional catalyst in the prior art.

Description

technical field [0001] The invention relates to the technical field of electrochemistry, in particular to a preparation method of a carbon-nitrogen-based iron material zinc-air battery catalyst. Background technique [0002] A battery is a device that can convert and store chemical energy and electrical energy. Zinc-air batteries use oxygen or pure oxygen in the air as the positive electrode active material, metal zinc as the negative electrode, and alkaline electrolyte as the electrolyte to form a redox environment inside the battery. - It migrates between the electrodes to form a closed circuit inside the battery and completes the charging / discharging process of the battery. It is a new type of extremely clean energy storage device. Electrochemically rechargeable zinc-air batteries have high energy density, wide range of sources, good safety and low cost, and are an important technical direction for efficient conversion and storage of electric energy. [0003] In a zinc-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90
CPCY02E60/50
Inventor 陈端云晏成林李清湘钱涛肖义亮王孟凡伏志宏钟勇周少强江皇义
Owner SHENZHEN NONFEMET TECH
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