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A kind of high durability enhanced proton exchange membrane and its preparation method and application

A proton exchange membrane, durable technology, used in chemical instruments and methods, final product manufacturing, climate sustainability, etc., can solve problems such as low utilization of metal oxide surfaces, decreased proton conductivity, and degradation of single cell performance. , to achieve the effect of fast and repeatable preparation process, safe and controllable preparation process, and reduced performance decay rate

Active Publication Date: 2022-04-05
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The free radical quenching activity of metal oxides comes from the defect states on the surface. However, metal oxides have good crystallinity, and the concentration of defect states on the surface is generally low, which makes the actual surface utilization of metal oxides low.
Moreover, the surface of a single-component metal oxide is easily dissolved in an acidic environment, resulting in free metal ions. When the metal ions are coordinated with some groups in the perfluorosulfonic acid resin, the proton conductivity will be reduced. In addition, , when the proton exchange membrane is assembled into a single fuel cell, the dissolved metal ions will gradually accumulate to the anode and cathode catalyst layers, causing a serious decline in the performance of the single cell

Method used

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  • A kind of high durability enhanced proton exchange membrane and its preparation method and application
  • A kind of high durability enhanced proton exchange membrane and its preparation method and application
  • A kind of high durability enhanced proton exchange membrane and its preparation method and application

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Experimental program
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Embodiment 1

[0039] The preparation method of the high-durability enhanced proton exchange membrane in the present embodiment comprises the following steps:

[0040] (1) Weigh 0.36g NaOH with an electronic balance and dissolve it in 20mL deionized water to prepare a 0.45mol / L NaOH alkaline solution, and weigh 1.3g of Ce(NO 3 ) 3 ·6H 2 O was dissolved in 8mL deionized water, and at the same time, the purchased 50wt% Mn(NO 3 ) 3 Diluted to 0.1476mol / L, respectively placed in an ultrasonic cleaner and vibrated until a uniform transparent solution was formed. The prepared Ce(NO 3 ) 3 ·6H 2 O aqueous solution and 2 mL diluted Mn(NO 3 ) 3 The aqueous solution was mixed and transferred to the PTFE liner, then the NaOH aqueous solution was poured into the PTFE liner, and the Ce(NO 3 ) 3 ·6H 2 The concentration of O is 0.1mol / L, Mn(NO 3 ) 3 The concentration of Ce is 0.01mol / L, and the molar ratio of Ce to Mn is 10:1;

[0041] (2) Seal the polytetrafluoroethylene liner and place it in...

Embodiment 2

[0049] The preparation method of the high-durability enhanced proton exchange membrane in the present embodiment comprises the following steps:

[0050] (1) Weigh 0.25g NaOH with an electronic balance and dissolve it in 20mL deionized water to prepare a 0.31mol / L NaOH alkaline solution, and weigh 1.3g of Ce(NO 3 ) 3 ·6H 2 O was dissolved in 9mL deionized water, and at the same time, the purchased 50wt% Mn(NO 3 ) 3 Diluted to 0.1476mol / L, respectively placed in an ultrasonic cleaner and vibrated until a uniform transparent solution was formed. The prepared Ce(NO 3 ) 3 ·6H 2 O aqueous solution and 1 mL diluted Mn(NO 3 ) 3 The aqueous solution was mixed and transferred to the PTFE liner, then the NaOH aqueous solution was poured into the PTFE liner, and the Ce(NO 3 ) 3 ·6H 2 The concentration of O is 0.1mol / L, Mn(NO 3 ) 3 The concentration of Ce is 0.005mol / L, and the molar ratio of Ce to Mn is 20:1;

[0051] (2) Seal the polytetrafluoroethylene liner and place it i...

Embodiment 3

[0059] The preparation method of the high-durability enhanced proton exchange membrane in the present embodiment comprises the following steps:

[0060] (1) Weigh 0.64g NaOH with an electronic balance and dissolve it in 20mL deionized water to prepare a 0.80mol / L NaOH alkaline solution, and weigh 1.3g of Ce(NO 3 ) 3 ·6H 2 O was dissolved in 9.5mL deionized water, and the purchased 50wt% Mn(NO 3 ) 3 Diluted to 0.1476mol / L, respectively placed in an ultrasonic cleaner and vibrated until a uniform transparent solution was formed. The prepared Ce(NO 3 ) 3 ·6H 2 O aqueous solution and 0.5mL diluted Mn(NO 3 ) 3 The aqueous solution was mixed and transferred to the PTFE liner, then the NaOH aqueous solution was poured into the PTFE liner, and the Ce(NO 3 ) 3 ·6H 2 The concentration of O is 0.1mol / L, Mn(NO 3 ) 3 The concentration of Ce is 0.0025mol / L, and the molar ratio of Ce to Mn is 40:1;

[0061] (2) Seal the polytetrafluoroethylene lining and place it in a high-pressu...

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Abstract

The invention discloses a high-durability enhanced proton exchange membrane and its preparation method and application. The proton exchange membrane includes an expanded polytetrafluoroethylene membrane for support and a perfluorosulfonic acid resin membrane for proton conduction. The fluorosulfonic acid resin membrane is located on both sides of the expanded polytetrafluoroethylene membrane and in the internal pores, and the perfluorosulfonic acid resin membrane is dispersed with a multi-element metal oxide free radical quencher for reducing the decay rate of fuel cell performance. The multi-element metal oxide free radical quencher was introduced into the perfluorosulfonic acid resin, and introduced into the expanded polytetrafluoroethylene membrane by scraping method, and the enhanced proton exchange membrane was prepared. The chemical corrosion resistance of the composite proton exchange membrane prepared by the present invention is greatly improved, it can adapt to harsh fuel cell working conditions such as idling, start-stop, etc., and can be applied to various usage scenarios. It is a promising composite proton exchange membrane, and the preparation process is highly controllable, and the single-shot yield is large, which can be directly used in continuous production.

Description

technical field [0001] The invention relates to a membrane material and its preparation method and application, in particular to a fuel cell proton exchange membrane and its preparation method and application. Background technique [0002] Hydrogen fuel cell is an energy conversion device that can continuously convert the chemical energy stored in hydrogen into electrical energy. It has the advantages of environmental protection, high energy conversion efficiency, and low noise. It is considered to be the first after hydropower, thermal power, and nuclear power. Four generations of power generation technology. Fuel cells can be used in passenger cars, airplanes, ships, portable power supplies, aerospace, and stationary power stations. Except for stationary power stations, most fuel cell applications are sensitive to the volume of the fuel cell system. The power density has become the development trend of the current fuel cell system. Reducing the thickness of the proton ex...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/08B32B27/32B32B27/36B32B37/06B32B27/30C08J5/22C08L29/10C08K3/22H01M8/1051H01M8/1086
CPCB32B27/08B32B27/322B32B27/36B32B37/06B32B27/30C08J5/225C08J5/2293H01M8/1051H01M8/1086C08J2329/10C08K2003/2213C08K2003/2262C08K2201/011Y02P70/50Y02E60/50
Inventor 刘建国芮志岩李佳霍有修刘佳
Owner NANJING UNIV
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