Proton exchange membrane fuel cell flow channel

A proton exchange membrane and fuel cell technology, applied in the field of flow channels, to achieve the effect of promoting transport, simple structure, preventing or alleviating cathode water flooding

Inactive Publication Date: 2014-11-12
TIANJIN UNIV
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  • Application Information

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So far, there is no relevant report on the change of flow channel contact angle and the influence o...

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  • Proton exchange membrane fuel cell flow channel
  • Proton exchange membrane fuel cell flow channel
  • Proton exchange membrane fuel cell flow channel

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Embodiment Construction

[0013] The present invention is an improvement on the traditional proton exchange membrane parallel flow channel or serpentine flow channel structure. According to the characteristics that the surface contact angle and hydrophilicity and hydrophobicity of the flow channel can be adjusted, a flow channel layout structure with a gradual change in contact angle is obtained to improve the flow rate of liquid water. The transmission driving force in the flow direction of the flow channel promotes the drainage process of the product in the cathode flow channel, and realizes the design and processing of the battery flow channel with different drainage capabilities, which can meet the output performance and stability requirements of the proton exchange membrane fuel cell under different working conditions, especially Better battery performance at high current density.

[0014] Common battery flow channels include battery flow channels arranged on a bipolar plate, one or more battery fl...

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Abstract

The invention discloses a proton exchange membrane fuel cell flow channel. The proton exchange membrane fuel cell flow channel comprises at least one branch flow channel, wherein a plurality of geometric partition structures with variable contact angles are arranged on the flow channel wall of each branch flow channel in the flow direction of gas and the water drainage direction, and the contact angles of the geometric partition structures with the variable contact angles are reduced sequentially from each branch flow channel inlet to the corresponding branch flow channel outlet. The proton exchange membrane fuel cell flow channel has the advantages of being simple in structure, easy to process and low in cost; due to the fact that the contact angle gradual change structures of different partition areas are arranged in the flow direction of the gas, the contact angles in each branch flow channel are reduced sequentially from the corresponding inlet to the corresponding outlet, the hydrophilicity gradually increases, and therefore surface tension gradients of water drops exist on each branch flow channel wall face, the transmission driving force of the water drops is increased in the decreasing direction of the contact angles of each branch flow channel, transmission of the water drops from the interior of each branch flow channel to the corresponding outlet, and water generated on a cathode can be fast drained to the corresponding outlet through each branch flow channel.

Description

technical field [0001] The invention relates to a flow channel, in particular to a flow channel used for discharging water from the cathode product of a proton exchange membrane fuel cell. Background technique [0002] A proton exchange membrane fuel cell consists of an anode, a cathode, and an electrolyte membrane between the electrodes. The anode and the cathode respectively use hydrogen and oxygen as fuels to directly convert chemical energy into electrical energy. The only product is water generated by the electrochemical reaction at the cathode. The flow channel of the fuel cell is the main channel for the fuel reaction gas to be transported from the outside to the inside of the battery, and the product of the electrode catalytic layer to be transported from the electrode to the outside of the battery. An important factor in utilization and battery performance. Parallel flow channels and serpentine flow channels are typical traditional fuel cell flow channels, such as ...

Claims

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Application Information

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IPC IPC(8): H01M8/02H01M8/10H01M8/0258
CPCH01M8/026Y02E60/50
Inventor 尹燕杜青李献国焦魁
Owner TIANJIN UNIV
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