Preparation method and application of oxygen reduction cathode catalyst of aluminum-air battery

A technology of aluminum-air batteries and catalysts, applied in battery electrodes, physical/chemical process catalysts, circuits, etc., can solve the problems of high price, cumbersome synthesis steps, unsuitable for promotion and mass production, and achieve low price, simple operation, The effect of promoting application and commercialization

Inactive Publication Date: 2015-08-26
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, porphyrins and phthalocyanine metal macrocycles are expensive and the synthesis steps are cumbersome, so they are not suitable for popularization and mass production.

Method used

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  • Preparation method and application of oxygen reduction cathode catalyst of aluminum-air battery
  • Preparation method and application of oxygen reduction cathode catalyst of aluminum-air battery
  • Preparation method and application of oxygen reduction cathode catalyst of aluminum-air battery

Examples

Experimental program
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Effect test

Embodiment 1

[0019] Disperse chitosan in deionized water, then slowly add cobalt nitrate aqueous solution dropwise, stir at room temperature for 2 hours, allow it to fully chelate, wash the metal chelate with deionized water 2 to 3 times, add urea in different mass ratios, Stirring was continued for 2 h, and then the water was evaporated to dryness at 50 °C, and the obtained sample was dried in a vacuum oven for 12 hours for later use. Put an appropriate amount of dried sample in a porcelain boat, put it in a tube furnace, raise the temperature up to 800 °C at a rate of 5 °C / min under the protection of nitrogen, keep it for 2 hours, and then cool it down to room temperature naturally to obtain a black powder substance. Then add it to 20 mL of 0.5 mol / L H 2 SO 4 solution, stirred at 80°C for 8 hours, washed 2-3 times with deionized water, filtered with suction, and dried at 60°C for 12 hours.

[0020] Weigh 4 mg of the above sample, put it in a 4 mL plastic bottle, and take 1900 uL of ab...

Embodiment 2

[0022] Disperse chitosan in deionized water, then slowly add cobalt nitrate aqueous solution dropwise, stir at room temperature for 2 hours, allow it to fully chelate, wash the metal chelate with deionized water 2 to 3 times, add urea in different mass ratios, Stirring was continued for 2 h, and then the water was evaporated to dryness at 50° C., and the obtained sample was dried in a vacuum oven for 12 hours for use. Put an appropriate amount of dried sample in a porcelain boat, put it in a tube furnace, raise the temperature to 800°C at a rate of 5°C / min under the protection of nitrogen, keep it warm for 2 hours, and then cool it down to room temperature naturally to obtain a black powder substance. Then add it to 20 mL of 0.5 mol / L H 2 SO 4 solution, stirred at 80°C for 8 hours, washed 2 to 3 times with deionized water, filtered with suction, and dried at 60°C for 12 hours.

[0023] Weigh the above samples, activated carbon, acetylene black and PTFE with a mass ratio o...

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PUM

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Abstract

The invention discloses a preparation method and application of an oxygen reduction cathode catalyst of an aluminum-air battery. According to the preparation process of the oxygen reduction catalyst, chitosan serves as a carbon source and a transition metal chelating agent, urea serves as a nitrogen source, and pyrolysis is carried out under nitrogen protection. The sample obtained through the method serves as the oxygen reduction cathode catalyst of the aluminum-air battery, the catalyst is low in cost, rich in resource and simple in operation, has good catalytic action on oxygen reduction, and can be a new oxygen reduction catalyst hopefully.

Description

technical field [0001] The invention relates to the preparation of an oxygen reduction catalyst and its application in aluminum-air batteries. Background technique [0002] Aluminum-air batteries have the characteristics of high energy density, high theoretical voltage, high specific power and abundant resources. However, the cathode oxygen reduction catalyst has been the key to limit its development and application. The main problem causing these problems is that platinum-based catalysts have the best catalytic performance for oxygen reduction, but their scarcity of resources and high price limit their application and promotion. Raise has done a lot of research. Platinum particles with smaller particle size and larger surface area are prepared by some methods to increase the active sites of platinum for oxygen reduction, thereby reducing the amount of platinum used. The development of non-noble metal oxygen reduction catalysts is an important way to realize the applicati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24H01M4/90
CPCY02E60/50
Inventor 申江蒋金芝唐有根
Owner CENT SOUTH UNIV
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