Metal bipolar plate for proton exchange membrane fuel cell and preparation method thereof

A technology of metal bipolar plates and proton exchange membranes, which is applied in the direction of battery electrodes, circuits, electrical components, etc., can solve the problem of corrosion resistance that needs to be investigated, the conductivity of conductive ceramics is difficult to achieve high, the mechanical properties and conductivity of bipolar plates Difficulties and other problems, to achieve excellent electrical conductivity, low material cost, and improve the overall competitiveness of the effect

Active Publication Date: 2010-08-11
SUNRISE POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The patented technology with the patent number CN200610125191.X relates to a proton exchange membrane fuel cell bipolar plate and its preparation method. The mechanical properties and electrical conductivity of the plates are difficult to compare with metal bipolar plates
The patented technologies of CN200810086375.9, CN200810086374.4 and CN200810086373.X relate to the preparation methods of three kinds of conductive ceramic modified films on the surface of metal bipolar plates. The disadvantage is that the conductivity of conductive ceramics is difficult to reach a very high level. Moreover, the corrosion resistance in the fuel cell environment remains to be investigated.

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  • Metal bipolar plate for proton exchange membrane fuel cell and preparation method thereof
  • Metal bipolar plate for proton exchange membrane fuel cell and preparation method thereof

Examples

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Embodiment 1

[0016] Example 1 is a pure titanium bipolar plate with a surface modification layer thickness of 3 mm. The modified layer was prepared on a pure titanium bipolar plate by magnetron sputtering technique. The modified layers are the metal titanium intermediate layer 2 and the carbon-based film composite layer 3 respectively, and the carbon-based film composite layer 3 contains metal titanium particles 4 and titanium carbide particles 5 . When preparing the modified layer, there are 6 symmetrical target positions in the magnetron sputtering equipment, and 3 titanium targets and 3 carbon targets are opposite to each other. During the film forming process, the sample to be plated revolves around the vacuum chamber while rotating. Both the titanium target and the carbon target have a purity of 99.99%, a thickness of 40mm, and a diameter of 80mm. Clamp the bipolar plate substrate with a size of 100mm×100mm×1.0mm on the hanger. After the vacuum chamber is sealed, use a mechanical p...

Embodiment 2

[0018] Example 2 is a titanium alloy bipolar plate with a surface modification layer thickness of 3 mm. The modified layer was prepared on the titanium alloy bipolar plate by magnetron sputtering technique. The modified layers are the metal titanium intermediate layer 2 and the carbon-based film composite layer 3 respectively, and the carbon-based film composite layer 3 contains metal titanium particles 4 and titanium carbide particles 5 . When preparing the modified layer, the modified layer is prepared on the titanium alloy bipolar plate by ion plating technology. There are 6 symmetrical target positions in the equipment, 3 titanium targets and 3 carbon targets are opposite to each other. During the film forming process, the sample to be plated revolves around the vacuum chamber while rotating. Both the titanium target and the carbon target have a purity of 99.99%, a thickness of 40mm, and a diameter of 80mm. Clamp the bipolar plate substrate with a size of 100mm×100mm×1....

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Abstract

The invention discloses a metal bipolar plate for a proton exchange membrane fuel cell. A modifying layer is arranged on the surface of the metal bipolar plate and comprises a metallic titanium intermediate layer contiguous to a metal substrate and a carbon-based film composite layer on the metallic titanium intermediate layer. The carbon-based film composite layer on the metallic titanium intermediate layer is a carbon-based film composite layer which is formed by mixing carbon, titanium carbide and metallic titanium. The invention has the advantages that a metal bipolar plate matrix is provided with multilayer protection; protective layers can be mutually compensated, so that the bipolar plate has extremely-strong corrosion resistant performance and thereby remarkably prolongs the service life of the bipolar plate; meanwhile, the bipolar plate has excellent conductive performance, can remarkably reduce the internal resistance of the proton exchange membrane fuel cell and improve the output performance of the cell; and the modifying layer has low cost, which is beneficial to reduce the cost of the whole fuel cell system, thereby improving the overall competitiveness.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to the manufacturing technology of fuel cell bipolar plates. Background technique [0002] In the prior art, the surface of the metal bipolar plate is subjected to surface modification treatment or composed of two components to meet the requirements of the bipolar plate for electrical conductivity and corrosion resistance. The patented technology with the patent number CN200610125191.X relates to a proton exchange membrane fuel cell bipolar plate and its preparation method. The mechanical properties and electrical conductivity of the polar plate are difficult to compare with the metal bipolar plate. The patented technologies of CN200810086375.9, CN200810086374.4 and CN200810086373.X relate to the preparation methods of three kinds of conductive ceramic modified films on the surface of metal bipolar plates. The disadvantage is that the conductivity of conductive ceramics is diffi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/86H01M4/88
CPCY02E60/50
Inventor 付宇潘欢欢侯中军刘常福明平文
Owner SUNRISE POWER CO LTD
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