A kind of air cathode based on boron nitrogen carbon ternary covalent composite material and its preparation method and zinc-air secondary battery

A boron-nitrogen-carbon ternary and composite material technology, which is applied in the direction of fuel cell half-cells and secondary battery-type half-cells, battery electrodes, circuits, etc., can solve low catalytic efficiency, unstable high-current discharge, battery Poor conductivity and other problems, to achieve the effect of improving catalytic performance, improving electrical conductivity, and improving efficiency

Active Publication Date: 2019-04-30
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

How to make a device that is not leaking, easy to disassemble and replace the electrolyte and zinc sheet, how to prepare an air cathode with good air permeability, high hydrophobicity, high conductivity and high catalytic performance, and how to combine boron, nitrogen and carbon ternary covalent Composite materials are added to zinc-air secondary batteries to improve the problems of poor battery conductivity, low catalytic efficiency, and unstable high-current discharge, which is the problem to be solved by the present invention

Method used

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  • A kind of air cathode based on boron nitrogen carbon ternary covalent composite material and its preparation method and zinc-air secondary battery
  • A kind of air cathode based on boron nitrogen carbon ternary covalent composite material and its preparation method and zinc-air secondary battery
  • A kind of air cathode based on boron nitrogen carbon ternary covalent composite material and its preparation method and zinc-air secondary battery

Examples

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Effect test

Embodiment 1

[0039] Immerse 2cm*2cm carbon paper in 15wt% polytetrafluoroethylene emulsion for 5min, 10min, 15min, 20min, 25min, 30min, 40min to optimize the hydrophobic time.

Embodiment 2

[0041] Immerse 2cm*2cm carbon paper in 0wt%, 5wt%, 10wt%, 15wt% polytetrafluoroethylene emulsion for 10min to optimize the hydrophobic concentration.

Embodiment 3

[0043] Soak the carbon paper in polytetrafluoroethylene emulsion (the mass concentration of polytetrafluoroethylene is 5wt%-60wt%, 10wt% is selected in this example) (the soaking time is 5-40min, 20min is selected in this example) , carry out hydrophobic treatment, dry at 80°C for 30min, and sinter at 360°C for 30min; acetylene black and polytetrafluoroethylene emulsion (the mass ratio of acetylene black to polytetrafluoroethylene emulsion is 7:3 to 2:8, In this example, 6:4 is selected; the mass concentration of polytetrafluoroethylene is 5wt%~60wt%, and 60wt% is selected in this example; the carbon load of acetylene black is 0.5~1.5mg / cm 2 , 1mg / cm was selected in this example 2 ) is dispersed and mixed in ethanol, and under a certain pressure, the above-mentioned mixed liquid is pressure-atomized on one side of the carbon paper that has been treated with water by pressure atomization, dried at 80°C for 30 minutes, and sintered at 360°C for 30 minutes;

[0044] Activated ca...

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Abstract

The invention discloses an air cathode based on a boron-nitrogen-carbon ternary covalent composite material, a preparation method thereof, and a zinc-air secondary battery. The air electrode is sequentially combined by a current collector, a waterproof and breathable layer and a catalytic layer through a binder The current collector is hydrophobically treated carbon paper, the waterproof and breathable layer is acetylene black, and the catalytic layer is a boron-nitrogen-carbon ternary covalent composite material based on carbon black. The air cathode provided by the invention has high hydrophobicity, high conductivity, high catalytic performance and high stability.

Description

technical field [0001] The invention relates to the field of zinc-air batteries, in particular to the synthesis of a novel catalyst material, the design and manufacture of zinc-air secondary battery devices, the optimization of gas diffusion electrodes and its preparation method. Background technique [0002] As a kind of metal-air battery, zinc-air battery uses oxygen as the positive electrode active material, metal zinc with negative electrode potential as the negative electrode, and neutral or alkaline electrolyte aqueous solution as the electrolyte. Zinc-air batteries are divided into primary batteries and secondary batteries. Compared with primary batteries, zinc-air secondary batteries have the characteristics of both storage batteries and fuel cells. They have high specific energy, good specific capacity, stable performance, stable discharge, long storage time, and safe use with little pollution to ecological safety. Great market prospect. [0003] However, there ar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/86H01M4/88H01M4/90H01M12/08
CPCH01M4/8605H01M4/8657H01M4/8807H01M4/8828H01M4/9083H01M12/08Y02E60/10
Inventor 李颖马晓兰刘松琴
Owner SOUTHEAST UNIV
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