Liquid metal composite proton exchange membrane for methanol fuel battery as well as preparation method thereof

A methanol fuel cell, proton exchange membrane technology, applied in fuel cells, circuits, electrical components, etc., can solve the problems of difficult reduction of oxidants, size change, methanol occupation, etc., and achieve high proton conductivity, difficult to size change, and good size. The effect of stability

Inactive Publication Date: 2018-07-06
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The high temperature resistance of these materials, especially for methanol fuel, is difficult to prevent the penetration of alcohol when working at high temperature. The Chinese patents with application number 201210108967.2 and application number 201210097525.2 also cannot achieve good resistance to alcohol penetration when the temperature is high
Due to the inability to block the penetration of alcohol, methanol occupies the active site of the oxidant, and the oxidant is difficult to be reduced quickly and effectively
Moreover, in order to improve the proton conductivity, it is expected to increase the temperature, but at high temperatures, the proton exchange membrane has poor high temperature resistance, swelling, dimensional changes, and even failure

Method used

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  • Liquid metal composite proton exchange membrane for methanol fuel battery as well as preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Example 1 Preparation of Liquid Metal Composite Proton Exchange Membrane for Methanol Fuel Cell

[0040] Prepared as follows:

[0041] a. Weighing the reaction raw materials: 12 parts by weight of bismuth-tin alloy, 25 parts by weight of sulfonated polyether ether ketone, and 10 parts by weight of sodium phosphotungstate.

[0042] b. Take the sulfonated polyether ether ketone in the above parts by weight and use the low-temperature cryogenic airflow crushing system to crush the material, and conduct heat exchange with the material through the liquid nitrogen cold source to cool the material to -140°C. The low-temperature material is subjected to low temperature in the crushing area. High-pressure nitrogen impact crushing, the crushed material is classified by eddy current, the particle size of the fine powder after classification can reach 2.0-8.0 microns, and it is crushed into fine powder sulfonated polyether ether ketone;

[0043] c. Take bismuth-tin alloy and sodiu...

Embodiment 2

[0044] Example 2 Preparation of Liquid Metal Composite Proton Exchange Membrane for Methanol Fuel Cell

[0045] Prepared as follows:

[0046] a. Weighing the reaction raw materials: 10 parts by weight of bismuth-tin alloy, 22 parts by weight of sulfonated polyether ether ketone, and 7 parts by weight of sodium phosphotungstate.

[0047] b. Take the sulfonated polyether ether ketone in the above parts by weight and use the low-temperature cryogenic airflow crushing system to crush the material, and conduct heat exchange with the material through the liquid nitrogen cold source to cool the material to -140°C. The low-temperature material is subjected to low temperature in the crushing area. High-pressure nitrogen impact crushing, the crushed material is classified by eddy current, the particle size of the fine powder after classification can reach 2.0-8.0 microns, and it is crushed into fine powder sulfonated polyether ether ketone;

[0048] c. Take bismuth-tin alloy and sodium...

Embodiment 3

[0049] Example 3 Preparation of Liquid Metal Composite Proton Exchange Membrane for Methanol Fuel Cell

[0050] Prepared as follows:

[0051] a. Weighing the reaction raw materials: 16 parts by weight of bismuth-tin alloy, 26 parts by weight of sulfonated polyether ether ketone, and 12 parts by weight of sodium phosphotungstate.

[0052] b. Take the sulfonated polyether ether ketone in the above parts by weight and use the low-temperature cryogenic airflow crushing system to crush the material, and conduct heat exchange with the material through the liquid nitrogen cold source to cool the material to -140°C. The low-temperature material is subjected to low temperature in the crushing area. High-pressure nitrogen impact crushing, the crushed material is classified by eddy current, the particle size of the fine powder after classification can reach 2.0-8.0 microns, and it is crushed into fine powder sulfonated polyether ether ketone;

[0053] c. Take bismuth-tin alloy and sodiu...

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Abstract

The invention relates to a liquid metal composite proton exchange membrane for a methanol fuel battery as well as a preparation method thereof, and belongs to the technical field of a fuel battery. The preparation method of the liquid metal composite proton exchange membrane for the methanol fuel battery comprises the following steps: a, pulverizing sulfonated polyetheretherketone into fine micropowder; and b, mixing bismuth tin alloy and sodium phosphotungstate at 120 to 150 DEG C, adding the sulfonated polyetheretherketone fine micropowder, dispersing uniformly under impact of high-pressurehot air flow, spray-coating under high pressure to form a membrane, demolding and performing hot-pressing shaping to obtain the liquid metal composite proton exchange membrane. According to the liquidmetal composite proton exchange membrane for the methanol fuel battery, which is prepared by the method, composite bismuth tin liquid metal is dispersed in the proton exchange membrane, the liquid metal is in a liquid state at 120 to 150 DEG C and can repair and inhibit swelling of the membrane under the high-temperature condition of 120 to 150 DEG C, the proton exchange membrane is self-repairedat high temperature through the bismuth tin liquid metal, and the aim for resisting alcohol penetration is fulfilled.

Description

technical field [0001] The invention relates to a liquid metal composite proton exchange membrane for a methanol fuel cell and a preparation method thereof, belonging to the technical field of fuel cells. Background technique [0002] A proton exchange membrane fuel cell (PEMFC) is a fuel cell that in principle is equivalent to an "inverse" device for water electrolysis. Its single cell is composed of anode, cathode and proton exchange membrane. The anode is the place where the hydrogen fuel is oxidized, and the cathode is the place where the oxidant is reduced. Both electrodes contain catalysts that accelerate the electrochemical reaction of the electrodes. + media, only H + pass while H 2 The lost electrons pass through the wire. When working, it is equivalent to a DC power supply, the anode is the negative pole of the power supply, and the cathode is the positive pole of the power supply. Proton exchange membrane fuel cells use solid polymers (proton exchange membrane...

Claims

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Application Information

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IPC IPC(8): H01M8/106
CPCH01M8/106Y02E60/50
Inventor 陈庆曾军堂
Owner CHENDU NEW KELI CHEM SCI CO LTD
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