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Composite bipolar plate for proton exchange membrane fuel cell and production method thereof

A proton exchange membrane and fuel cell technology, applied in fuel cells, battery electrodes, electrochemical generators, etc., can solve problems such as low strength, low electrical conductivity, and low thermal conductivity

Inactive Publication Date: 2011-11-16
STATE GRID JIANGSU ELECTRIC POWER CO LTD NANTONG POWER SUPPLY BRANCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, compared with the bipolar plates produced by the above two methods, the bipolar plates produced by this method have disadvantages such as low electrical conductivity, low strength, and low thermal conductivity.

Method used

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  • Composite bipolar plate for proton exchange membrane fuel cell and production method thereof
  • Composite bipolar plate for proton exchange membrane fuel cell and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 1) 10% by weight of phenolic resin, 10% by weight of titanium carbide and 77% by weight of graphite are dry-mixed by ball milling, and then dried in an oven at 60-100°C for 1-5 hours;

[0033] 2) Take out the dried powder, add 3% by weight curing agent hexamethylenetetramine, put it into the mold cavity, the mold cavity is processed with a flow channel (flow field), so that the flow channel after molding All can be molded at one time; (2) Clamping: Clamp the mold after adding materials, the clamping time is 5s~30s, the clamping pressure is 40 MPa, the molding temperature is 200°C, and the holding time is 5min. ;3) Exhaust: After the mold is closed, the pressure needs to be released and exhausted. The number of exhausts is 1~3 times, and the time for each time is 3s~20s; (5) Demoulding: After the curing is completed, use the push rod to demould .

[0034] 3) After compression molding, clamp the bipolar plate with a clamp and place it in an oven for heat preservation tre...

Embodiment 2

[0038] 1) Mix 5%~20% (example 5%, 12%, 20%) of phenolic resin by weight, 1%~10% (example 1%, 5%, 10%) of titanium carbide by weight and 60%~ Mix 93% (for example 60%, 75%, 93%) of graphite by weight, and then dry it in an oven at 60-100°C (for example, 60°C, 80°C, 100°C) for 1-5 h;

[0039] 2) Take out the dried powder, add 1~10% (eg 1%, 6%, 10%) curing agent by weight, put it into the mold cavity, and the mold cavity is processed with a flow channel (flow field) , so that all the flow channels can be formed at one time after molding; (2) Mold closing: after feeding materials, the mold closing time is 5s~30s, and the mold closing pressure is 5~60 MPa (for example, 5 MPa, 30 MPa, 60 MPa MPa), the molding temperature is 130~220°C (eg 130°C, 180°C, 220°C), and the holding time is 1~15min. ;3) Exhaust: After the mold is closed, the pressure needs to be released and exhausted. The number of exhausts is 1~3 times, and the time for each time is 3s~20s; (5) Demoulding: After the curi...

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Abstract

The invention discloses a composite bipolar plate for a proton exchange membrane fuel cell and a production method thereof. The composite bipolar plate comprises phenolic resin, titanium carbide, graphite and a curing agent. In the invention, graphite powder, modified phenolic resin and titanium carbide powder are selected. Titanium carbide (TiC) belongs to face-centered cubic lattices, has high melting point, good heat conducting property, high hardness, good chemical stability and good high-temperature oxidation resistance, can not react with acid at normal temperature and has strong corrosion resistance and high conductivity (higher than pure graphite). The mechanical properties, the conductivity and the heat conducting property of the phenolic resin / graphite composite bipolar plate can be greatly improved, and the prepared bipolar plate not only has higher conductivity and heat conductivity, but also has higher strength and hydrogen corrosion resistance.

Description

technical field [0001] The invention relates to a formula and a forming method of a novel composite material bipolar plate for a proton exchange membrane fuel cell. Background technique [0002] The 21st century is a century of energy shortage. The development of new energy and the rational and efficient use of existing energy have become the theme of development in this century. At present, fossil energy such as oil, natural gas, and coal on which human beings depend is decreasing day by day, and will be replaced by renewable resources such as hydrogen energy, solar energy, and wind energy. At the same time, due to the inefficient combustion and use of existing resources (such as oil, natural gas and coal), both energy is wasted and the environment is seriously polluted, which has become an important problem that must be solved in this century. [0003] Fuel cells are a power generation device that can directly convert chemical energy into electrical energy. High energy c...

Claims

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Application Information

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IPC IPC(8): H01M4/86H01M4/88H01M8/0226
CPCY02E60/50H01M8/0226Y02P70/50
Inventor 黄明宇贾中实周一丹廖萍倪红军朱昱万晓峰汪兴兴问朋朋
Owner STATE GRID JIANGSU ELECTRIC POWER CO LTD NANTONG POWER SUPPLY BRANCH
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