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Preparation method of air electrode and aluminum air battery

A technology of air electrodes and metal-air batteries, which is applied in battery electrodes, circuits, fuel cell half-cells and primary battery half-cells, etc., and can solve complex electrode production processes, difficult mass production, and complicated preparation processes, etc. problem, to achieve the effect that the preparation process is simple and feasible, the preparation process is simple and practical, and the preparation process is simple

Inactive Publication Date: 2018-11-23
北京创能惠通新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The electrode production process is complicated, and it needs to go through dipping, spraying and subsequent drying processes
[0007] Aiming at the problems of complex air electrode preparation process, poor electrode consistency, and high difficulty in mass production, the present invention proposes a "dry method" preparation method, which is prepared by mixing materials and one-step rolling to prepare air electrodes. The preparation process is simple and easy to scale up. mass production

Method used

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  • Preparation method of air electrode and aluminum air battery
  • Preparation method of air electrode and aluminum air battery
  • Preparation method of air electrode and aluminum air battery

Examples

Experimental program
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Effect test

Embodiment 1

[0035] The mass ratio of manganese dioxide powder, acetylene black, activated carbon, and polytetrafluoroethylene powder is 20:35:30:15, weighed, processed in a pulverizer for 1 min, passed through a 100-mesh sieve, and then put the mixed powder into a vacuum mixer In, add a small amount of alcohol, mix and stir for 4h. The processed material is fed into the feed port, passed through the three-way vibrating equipment to make it completely flattened into the roller equipment to be pressed into a catalytic membrane with a thickness of 0.2mm, and then pressed with copper mesh and waterproof membrane polytetrafluoroethylene (PTFE) membrane Synthetic air electrodes. The prepared air electrode, aluminum plate, and potassium hydroxide electrolyte (concentration of 4mol / L) were used to assemble an aluminum-air battery and conduct electrical performance tests.

Embodiment 2

[0037] According to the mass ratio of manganese dioxide powder, acetylene black, activated carbon, carbon nanotubes, and polytetrafluoroethylene powder, respectively 20:35:25:5:15, process it in a pulverizer for 1.5 minutes, and pass through a 100-mesh sieve. Then add the mixed powder into a vacuum mixer, add a small amount of alcohol, and mix and stir for 3 hours. The processed material is fed into the feed port, passed through the three-way vibrating equipment to make it completely flattened into the roller equipment to be pressed into a catalytic membrane with a thickness of 0.2mm, and then pressed with copper mesh and waterproof membrane polytetrafluoroethylene (PTFE) membrane Synthetic air electrodes. The prepared air electrode, aluminum plate, and potassium hydroxide electrolyte (concentration of 4mol / L) were used to assemble an aluminum-air battery and conduct electrical performance tests.

Embodiment 3

[0039]According to the mass ratio of manganese dioxide nanowires, acetylene black, activated carbon, and polytetrafluoroethylene powder, respectively 20:40:25:15, weigh them in a pulverizer for 1 minute, pass through a 100-mesh sieve, and then add the mixed powder into the vacuum In the blender, add a small amount of alcohol, mix and stir for 4h. The processed material is fed into the feed port, passed through the three-way vibrating equipment in turn to make it completely flattened into the counter-roller equipment to be pressed into a catalytic membrane with a thickness of 0.2mm, and then pressed with copper mesh and waterproof membrane polytetrafluoroethylene (PTFE) membrane. Synthetic air electrodes. The prepared air electrode, aluminum plate, and potassium hydroxide electrolyte (concentration of 4mol / L) were used to assemble an aluminum-air battery and conduct electrical performance tests.

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Abstract

The invention discloses a preparation method of an air electrode and an aluminum air battery and relates to the technical field of batteries. The air electrode is prepared through the steps of mixingcatalyst material powder, conductive material powder and binder powder evenly through mixing equipment at a mass ratio of (10-40):(40-80):(10-30); directly pressing the mixture into a catalytic membrane through rolling equipment and directly laminating the catalytic membrane, a current collector and a waterproof membrane. The preparation technology method disclosed by the invention is simple, massproduction of the air electrode can be achieved, and the consistency of the air electrode is ensured through improving uniform distribution of materials in the electrode. The air electrode prepared by adopting the method is assembled into the aluminum air battery, the maximum power density can reach 300mW / cm<2>, the curve of the battery is stable in a constant-current discharge test (150mA / cm<2>), the utilization rate of negative electrode aluminum can reach 89% and the aluminum air battery has good electric property.

Description

Technical field: [0001] The invention relates to the technical field of batteries, in particular to an air electrode material and a preparation method. Background technique: [0002] A metal-air battery uses an active metal as the negative electrode and an air electrode as the positive electrode. It is a chemical power source that releases electrical energy through the reaction of the active metal with oxygen. Metal-air batteries have strong competitive advantages such as high specific energy, stable working voltage, long service life, safety and reliability, abundant and renewable raw materials, and low price, and have broad market application prospects. [0003] At present, the kinetic process of the oxygen evolution reaction and reduction reaction of most metal-air fuel cells is slow. The core factor is the performance of the air electrode, which requires uniform distribution of the air electrode aperture, porosity, and pores, uniform thickness of the air electrode, and g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M12/06
CPCH01M4/88H01M12/06
Inventor 王国庆甄宏玉
Owner 北京创能惠通新能源科技有限公司
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