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Anti-reverse-pole catalyst for battery and preparation method and application thereof

A catalyst and electrode technology, applied in the field of anti-reverse electrode catalyst for battery and its preparation, can solve the problem of insufficient anti-reverse electrode ability of anode catalyst, and achieve the effect of enhancing the anti-reverse electrode performance

Active Publication Date: 2021-11-09
DONGFENG MOTOR GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The present application provides an anti-reverse catalyst for batteries and its preparation method and application to solve the technical problem of insufficient anti-reverse ability of fuel cell anode catalysts in the prior art

Method used

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  • Anti-reverse-pole catalyst for battery and preparation method and application thereof
  • Anti-reverse-pole catalyst for battery and preparation method and application thereof

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Experimental program
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preparation example Construction

[0034] Such as figure 2 Shown, the application provides a kind of preparation method of anti-reversed pole catalyst, described method comprises:

[0035] S1. Taking the powder of the inner core matrix and dispersing it in the first solvent, and then subjecting the dispersed solution to ultrasonic cell crushing to obtain the inner core matrix solution;

[0036] S2. Mix the inner core matrix solution and the precursor of the coating layer, then drop a reducing agent, and carry out a chemical reaction under stirring and alkaline conditions to obtain a solid product, which contains the a mixture of the first active noble metal element and the second active noble metal element;

[0037] S3. The solid product is subjected to the first heat treatment and the second heat treatment in sequence to obtain an anti-anti-electrode catalyst; the catalyst has a core-shell structure, wherein the core matrix is ​​a chemical substance containing the first active noble metal element, including ...

Embodiment 1

[0040] (1) For the anti-anti-reverse catalyst: select a certain amount of ruthenium powder and put it into a beaker, add deionized water and alcohol, the ratio of alcohol to water is 1:1, mix well and put it into an ultrasonic cell pulverizer for ultrasonic treatment for 0.5h; Add chloroiridic acid into the uniformly dispersed solution, then add dropwise sodium hydroxide and sodium borohydride solutions, and maintain a vigorous magnetic stirring state when adding the above solutions. After standing still, a mixture of iridium and ruthenium is obtained. After filtering and cleaning, the mixture is baked at a temperature of 90°C, and then roasted at a high temperature at a temperature of 500°C to obtain IrO 2 Ru core-shell structure anti-anti-electrode catalyst;

[0041] (2) For the anode catalyst: choose the Pt / C catalyst with a Pt content of 50%, add deionized water for wetting, then add a certain amount of Nafion emulsion and isopropanol with a mass fraction of 5%, and contro...

Embodiment 2

[0045] (1) For the anti-anti-reverse catalyst: select a certain amount of ruthenium powder and put it into a beaker, add deionized water and alcohol, the ratio of alcohol to water is 1:1, mix well and put it into an ultrasonic cell pulverizer for ultrasonic treatment for 0.5h; Add ruthenium chloride into the uniformly dispersed solution, then add sodium hydroxide and sodium borohydride solution dropwise, and maintain a vigorous magnetic stirring state when adding the above solution. After standing still, a mixture of iridium and ruthenium is obtained. After filtering and cleaning, the mixture is baked at a temperature of 90°C, and then roasted at a high temperature at a temperature of 500°C to obtain RuO 2 Ru core-shell structure anti-anti-electrode catalyst;

[0046] (2) For the anode catalyst: choose the Pt / C catalyst with a Pt content of 50%, add deionized water for wetting, then add a certain amount of Nafion emulsion and isopropanol with a mass fraction of 5%, and control...

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Abstract

The invention relates to an anti-reverse-pole catalyst for a battery and a preparation method and application thereof, which belong to the field of batteries. The anti-reverse-pole catalyst provided by the invention is of a core-shell structure, the core-shell structure comprises an inner core matrix and a coating layer, and the coating layer is compactly loaded on the surface of the inner core matrix to form a wrapping form; and the stability of the particles of the inner core matrix under high potential is greater than that of the particles of the coating laye. The inner core matrix particles with high ORE activity are wrapped by the coating layer particles with better stability to form the core-shell structure, the core-shell structure can inhibit the inner core matrix with high ORE activity from participating in the reaction and inhibit the rate of water electrolysis reaction (OER) in the battery reaction energy supply process, so that the rate of water electrolysis reaction (OER) and the rate of carbon corrosion reaction (COR) are balanced, and meanwhile, the coating layer with higher stability can protect the inner core matrix, so that the anti-reverse-pole performance of the catalyst is enhanced.

Description

technical field [0001] The present application relates to the field of batteries, in particular to an anti-reversal catalyst for batteries and its preparation method and application. Background technique [0002] Proton exchange membrane fuel cells are gradually being commercialized due to their environmental protection and high efficiency, but their durability has always been a major challenge. Among the many factors affecting the durability of fuel cells, the reverse polarity problem due to insufficient gas supply under dynamic conditions has a great impact on the service life and performance of fuel cells. [0003] Proton exchange membrane fuel cells are mainly composed of membrane electrodes (including diffusion layer, catalytic layer and proton exchange membrane), bipolar plates and sealing materials. The reaction gas is guided by the polar plate through the gas diffusion layer to the three-phase junction for reaction. During the operation of the stack, due to water f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/86H01M4/88H01M4/92
CPCH01M4/8657H01M4/92H01M4/8878Y02E60/50
Inventor 王智捷唐雪君周江峰曹天鹏
Owner DONGFENG MOTOR GRP
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