Low-platinum proton exchange membrane fuel cell membrane electrode and preparation method thereof

A proton exchange membrane, fuel cell membrane technology, applied in fuel cells, battery electrodes, circuits, etc., can solve the problems of difficult to improve the performance of platinum carbon catalysts and platinum alloy catalysts, and the date of mass production is still in the future. Conducive to separation and recycling, improving recycling rate, and improving the effect of utilization rate

Active Publication Date: 2020-08-25
WUXI WEIFU HIGH TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing technology is mainly to reduce the platinum loading by improving catalyst performance or using non-platinum catalysts. At this stage, it is difficult to improve the performance of platinum-carbon catalysts and platinum alloy catalysts. Non-platinum catalysts are still in the research and development stage, and the day of mass production is nowhere in sight.

Method used

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  • Low-platinum proton exchange membrane fuel cell membrane electrode and preparation method thereof
  • Low-platinum proton exchange membrane fuel cell membrane electrode and preparation method thereof

Examples

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Embodiment 1

[0028] A method for preparing a low-platinum proton exchange membrane fuel cell membrane electrode, comprising the following steps:

[0029] (1) Weigh 1 gram of 60% Pt / C catalyst (Jonson, UK) into a 50mL beaker, add 12.5mL deionized water, stir and disperse; measure 5mL isopropanol, 11mL Nafion with a mass fraction of 5% Mix the solution with 55mg of polyvinyl alcohol evenly, fully ultrasonically disperse to form catalyst ink, ultrasonically for 10min, and stand at 25°C for 5min;

[0030] (2) Set the area to 5*5cm 2 Soak the polytetrafluoroethylene porous material in the isopropanol solution for 10 minutes, take it out and dry it in an oven at 40°C;

[0031] (3) Soak the porous material obtained in step (2) in the catalyst ink obtained in step (1) for 10 minutes and then dry it in an oven at 140°C for 3 minutes to obtain a porous catalytic layer;

[0032] (4) Spray 3 mL of Nafion solution with a mass fraction of 0.05% on the surface of the porous catalytic layer prepared in ...

Embodiment 2

[0036] A method for preparing a low-platinum proton exchange membrane fuel cell membrane electrode, comprising the following steps:

[0037] (1) Weigh 1 gram of 60% Pt / C catalyst (Johnson Matthey, UK) into a 50mL beaker, add 12.5mL of deionized water, stir and disperse; measure 5mL of isopropanol, 11mL of 5% mass fraction Mix Nafion solution and 30mg polyvinyl alcohol evenly, fully ultrasonically disperse to form catalyst ink, ultrasonically for 10min, and stand at 25°C for 5min;

[0038] (2) Set the area to 5*5cm 2 Soak the polytetrafluoroethylene porous material in the isopropanol solution for 10 minutes, take it out and dry it in an oven at 40°C;

[0039] (3) Soak the porous material obtained in step (2) in the catalyst ink obtained in step (1) for 20 minutes and then dry it in an oven at 140°C for 3 minutes to obtain a porous catalytic layer;

[0040] (4) Spray 3 mL of Nafion solution with a mass fraction of 0.05% on the surface of the porous catalytic layer prepared in ...

Embodiment 3

[0044] A method for preparing a low-platinum proton exchange membrane fuel cell membrane electrode, comprising the following steps:

[0045](1) Weigh 1 gram of 40% Pt / C catalyst (Johnson Matthey, UK) into a 50mL beaker, add 12.5mL of deionized water, stir and disperse; measure 5mL of isopropanol, 7mL with a mass fraction of 5% Mix Nafion solution and 30mg polyvinyl alcohol evenly, fully ultrasonically disperse to form catalyst ink, ultrasonically for 10min, and stand at 25°C for 5min;

[0046] (2) Set the area to 5*5cm 2 Soak the polytetrafluoroethylene porous material in the isopropanol solution for 10 minutes, take it out and dry it in an oven at 40°C;

[0047] (3) Soak the porous material obtained in step (2) in the catalyst ink in step (1) for 20 minutes, then dry it in an oven at 140°C for 3 minutes, and repeat this process 3 times to obtain a porous catalytic layer;

[0048] (4) Spray 3 mL of Nafion solution with a mass fraction of 0.05% on the surface of the porous ca...

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Abstract

The invention belongs to the technical field of fuel cells, and particularly relates to a low-platinum proton exchange membrane fuel cell membrane electrode and a preparation method thereof. The low-platinum proton exchange membrane fuel cell membrane electrode comprises catalyst layers coated on the two sides of a proton exchange membrane, each catalyst layer comprises a porous material and a catalyst filled in the porous material, and the catalyst is one or more of platinum-carbon catalysts with the platinum loading capacity of 40%-60%. The catalyst layer of the membrane electrode is prepared from the porous material and the catalyst filled in the porous material, the usage amount of platinum is reduced by adjusting the structure of the catalyst layer of the membrane electrode, the usageamount of platinum is reduced by adopting a partial structure ordering process and adjusting the structure of the catalyst layer of the membrane electrode, and the cost of the fuel cell is reduced. Compared with a traditional membrane electrode, the membrane electrode provided by the invention adopts a partially ordered structure, so that the catalyst utilization rate can be effectively improved,the catalyst loading capacity is reduced, the membrane electrode swelling problem is solved, amplification is easy, and batch production is facilitated.

Description

technical field [0001] The invention belongs to the technical field of fuel cells, and in particular relates to a low-platinum proton exchange membrane fuel cell membrane electrode and a preparation method thereof. Background technique [0002] Proton Exchange Membrane Fuel Cell (PEMFC), as a new type of clean energy, has attracted worldwide attention due to its low pollution or even no pollution. With the development of fuel cell technology, cost, power density and lifetime become the key factors for its commercialization. As one of the key materials of the fuel cell, the membrane electrode plays an important role, and its stability and price directly determine the durability and cost of the battery. [0003] In the process of preparing membrane electrodes, whether it is a platinum alloy or a non-platinum catalyst, the goal is to greatly reduce the amount of platinum used without reducing the performance and life of the membrane electrode, thereby reducing the cost of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/86H01M4/92H01M8/1004H01M4/88
CPCH01M8/1004H01M4/8605H01M4/926H01M4/921H01M4/8647H01M4/8846Y02E60/50Y02P70/50
Inventor 刘凯张义煌许笑目陈杰李刚
Owner WUXI WEIFU HIGH TECH CO LTD
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