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Fuel cell membrane electrode anti-reverse electrode additive and preparation method thereof

A fuel cell membrane and proton exchange membrane technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of cumbersome catalyst preparation process, poor conductivity of titanium oxide, etc., and achieve favorable gas transport, good conductivity, and preparation methods simple effect

Active Publication Date: 2021-05-25
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the catalyst preparation process is cumbersome and requires high-temperature hydrogen reduction
And the conductivity of titanium oxide is poor, after adding the catalyst described in this invention in the anode catalytic layer, there will be obvious mass transfer polarization under high electric density

Method used

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  • Fuel cell membrane electrode anti-reverse electrode additive and preparation method thereof
  • Fuel cell membrane electrode anti-reverse electrode additive and preparation method thereof
  • Fuel cell membrane electrode anti-reverse electrode additive and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Take 10mL CoCl 2 (10mmol / L) solution, 3mL H 2 Add IrCl (10mmol / L) solution into 50mL ethylene glycol solution, stir well at 25°C, then add 1g NaBH 4 , and continued stirring at 25°C for 3h, the reaction product was washed with a large amount of deionized water, and then placed in a 60°C oven for vacuum drying overnight. After the dried powder was carefully ground, it was annealed in a tube furnace at 400°C for 2h at a heating rate of 2°C / min, and cooled naturally to room temperature to obtain the prepared sea urchin-like iridium-cobalt alloy catalyst.

[0034] Taking Example 1 as an example, figure 1 The morphology of the anti-reversal additive provided in Example 1 of the present invention has a particle size of about 100 nm, which is slightly larger than carbon black, so it can be added to the anode catalytic layer as a catalyst.

[0035] figure 2 The OER performance diagram of the prepared iridium-cobalt alloy catalyst and its performance diagram after the stabi...

Embodiment 2

[0038] Take 10mL CoCl 2 (10mmol / L) solution, 3mL H 2 Add IrCl (10mmol / L) solution into 50mL ethylene glycol solution, stir well at 25°C, then add 1g NaBH 4 , and continued stirring at 25°C for 3h, the reaction product was washed with a large amount of deionized water, and then placed in a 60°C oven for vacuum drying overnight. After the dried powder was carefully ground, it was annealed in a tube furnace at 500°C for 2h at a heating rate of 2°C / min, and cooled naturally to room temperature to obtain the prepared sea urchin-like iridium-cobalt alloy catalyst.

[0039] Taking Example 2 as an example, the catalyst prepared in Example 2 is at 10mA cm -2The overpotential is 295mV, and the performance is good. The anti-reversal additive prepared in Example 2 is introduced into the fuel cell anode catalyst layer in a physically mixed manner, and the anode catalyst layer includes a Pt / C catalyst and an anti-reversal additive IrCo alloy, wherein Pt / C and IrCo are in the catalyst lay...

Embodiment 3

[0041] Take 10mL CoCl 2 (10mmol / L) solution, 3mL H 2 Add IrCl (10mmol / L) solution into 50mL ethylene glycol solution, stir well at 25°C, then add 1g NaBH 4 , and continued stirring at 25°C for 3h, the reaction product was washed with a large amount of deionized water, and then placed in a 60°C oven for vacuum drying overnight. After the dried powder was carefully ground, it was annealed in a tube furnace at 300°C for 2h at a heating rate of 2°C / min, and cooled naturally to room temperature to obtain the prepared sea urchin-like iridium-cobalt alloy catalyst.

[0042] Taking Example 3 as an example, the catalyst prepared in Example 3 is at 10mA cm -2 The overpotential is 299mV, and the performance is good. The anti-reversal additive prepared in Example 3 is introduced into the fuel cell anode catalyst layer in a physically mixed manner, and the anode catalyst layer includes a Pt / C catalyst and an anti-reversal additive IrCo alloy, wherein Pt / C and IrCo are in the catalyst la...

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Abstract

The invention discloses a fuel cell membrane electrode anti-reverse electrode additive and a preparation method thereof. The additive comprises a self-supporting iridium-cobalt alloy catalyst prepared by using a sodium borohydride reduction method, the antipole resistance of the cell prepared by the additive provided by the invention is remarkably improved, carbon corrosion of an anode catalyst layer and agglomeration of platinum particles caused by antipole can be effectively relieved, and the durability of the fuel cell under complex working conditions is improved.

Description

technical field [0001] The invention relates to the technical field of proton exchange membrane fuel cells, in particular to an anti-anti-electrode additive for a fuel cell membrane electrode and a preparation method thereof, which can effectively alleviate the carbon corrosion of the anode catalytic layer and the agglomeration of platinum particles caused by the anti-electrode, and improve the stability of the battery. durability. Background technique [0002] Proton exchange membrane fuel cells (PEMFCs) have received considerable attention as a promising candidate for fuel cell electric vehicles due to their zero emissions, high efficiency, and high power density. PEMFCs have made remarkable progress over the past decade, but several obstacles remain, such as low durability, high cost, and insufficient infrastructure, which must be addressed before their widespread commercialization. [0003] Fuel starvation often occurs when fuel cell vehicles operate under complex opera...

Claims

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Application Information

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IPC IPC(8): H01M4/90H01M4/92H01M4/88
CPCH01M4/9041H01M4/921H01M4/8825H01M2004/8684Y02E60/50
Inventor 宋微李咏焕姜广俞红梅邵志刚
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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