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Preparation method of air battery cathode catalyst

A cathode catalyst and air battery technology, applied in the direction of battery electrodes, circuits, electrical components, etc., can solve the problems of poor crystallinity of crystal materials, poor dispersion of products, poor purity, etc., and achieve high open circuit voltage and strong catalytic activity , the effect of high capacity

Inactive Publication Date: 2015-09-16
CHINA FIRST AUTOMOBILE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The preparation process of the traditional manganese oxide cathode catalyst is pyrolytic reduction (carbothermal reduction). This method cannot avoid particle agglomeration caused by high temperature. The resulting product has poor dispersion, poor crystallinity of crystal materials, poor purity, particle size, shape is difficult to control

Method used

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  • Preparation method of air battery cathode catalyst
  • Preparation method of air battery cathode catalyst
  • Preparation method of air battery cathode catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Weigh 2.7g of potassium permanganate and 110ml of distilled water, and mix evenly under stirring to obtain a purple-black solution; take 8 grams of MnCl 2 4H 2 O add 20ml of water to form an aqueous solution; add the obtained aqueous solution dropwise to the purple-black solution, stir and mix evenly to obtain a suspension; transfer the obtained suspension to a polytetrafluoroethylene-lined stainless steel reaction kettle, After standing for 2 hours, the obtained product is separated into solid and liquid phases; the solid phase is washed with water until there is no ionic component, and Alpha-MnO 2 , the constant temperature standing time of the suspension was changed to 12h, and the prepared Beta-MnO 2； Alpha-MnO 2 with Beta-MnO 2 According to the mass ratio of 3:7 mixed and mechanical ball milled for 2 hours, the final catalyst product was obtained.

Embodiment 2

[0030] Weigh 2.7g of potassium permanganate and 110ml of distilled water, and mix evenly under stirring to obtain a purple-black solution; take 8 grams of manganese nitrate, add 20ml of water to configure an aqueous solution; add the obtained aqueous solution dropwise to the purple-black solution, stir and mix evenly, A suspension was obtained; the suspension was transferred to a polytetrafluoroethylene-lined stainless steel reactor, and stood at 120° C. for 2 h; the obtained product was separated into solid and liquid phases; the solid phase was washed with water until it was free of ionic components. Made Alpha-MnO 2 ; Change the standing time of the suspension at constant temperature to 12h, and the prepared Beta-MnO 2 , the Alpha-MnO 2 with Beta-MnO 2 Mix according to the mass ratio of 3:7 and mechanically ball mill for 2 hours to obtain the final catalyst product.

Embodiment 3

[0032] Weigh 2.7g of potassium permanganate and 110ml of distilled water, and mix evenly under stirring to obtain a purple-black solution; take 8 grams of manganese acetate and add 20ml of water to configure an aqueous solution; the resulting aqueous solution is added dropwise to the purple-black solution, stirred and mixed evenly to obtain Suspension; the suspension was transferred to a polytetrafluoroethylene-lined stainless steel reaction kettle, and stood at 120°C for 2 hours; the obtained product was separated into solid and liquid phases; the solid phase was washed with water until it was free of ionic components. Made Alpha-MnO 2 ; The constant temperature standing time of the suspension was changed to 12h, and the prepared Beta-MnO 2 ; Alpha-MnO 2 with Beta-MnO 2 Mixed by mass ratio 3:7 and mechanically ball milled for 2h to obtain the final catalyst product.

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Abstract

The invention relates to a preparation method of an air battery cathode catalyst, wherein the cathode catalyst is a mixture of Alpha-MnO2 and Beta-MnO2, and the reaction materials are bivalent manganous salt, heptavalent manganous salt and water; the bivalent manganous salt is one of manganese chloride, manganese sulfate, manganous nitrate, and manganese acetate; the heptavalent manganous salt is potassium permanganate which has a substantially strong catalytic activity. A substantially high open-circuit voltage is provided after the battery is assembled, with the voltage output being stable and the capacity being high.

Description

technical field [0001] The invention relates to a preparation method of an air battery cathode catalyst, which belongs to the technical field of fuel cells. Background technique [0002] A metal-air battery is a type of fuel cell in which a metal such as Mg, Al, Zn, Fe, etc. with a negative electrode potential is used as the negative electrode, and oxygen molecules in air or water are used as the positive electrode. This type of battery has broad application prospects because of its advantages such as high specific energy, stable working voltage, good safety, environmental protection and low manufacturing cost. The air electrode is the core part of the metal-air battery, and its redox catalyst is the key factor affecting the performance of the air electrode. Therefore, to develop the metal-air battery, the development of a cathode catalyst with excellent performance and stable operation is one of the most important links. [0003] The preparation process of the traditiona...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90
CPCH01M4/9016Y02E60/50
Inventor 王金兴张斌崔龙许德超刘宏宇韩建魏晓川张克金
Owner CHINA FIRST AUTOMOBILE
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