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Cathode water management structure of passive alcohol type fuel battery

A fuel cell, passive technology, used in fuel cells, fuel cell additives, battery electrodes, etc., can solve the problem of self-breathing channel blockage in the cathode flow field, and achieve the prevention of flooding, good insulation performance, and battery short-circuit prevention. Effect

Active Publication Date: 2014-07-23
INFORMATION SCI RES INST OF CETC
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a cathode water management structure of a passive alcohol fuel cell, which solves the problem of blockage of the self-breathing channel of the cathode flow field caused by liquid flooding, improves the mass transfer of oxygen, and improves the performance of the battery

Method used

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  • Cathode water management structure of passive alcohol type fuel battery
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  • Cathode water management structure of passive alcohol type fuel battery

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specific Embodiment approach 1

[0024] Specific implementation mode 1: In this implementation mode, an aluminum alloy is used to make the cathode flow field plate 7, and its structure is as follows Figure 2-3 As shown, self-breathing through holes 10 are arranged on the cathode flow field plate 7, an upper channel 8 is arranged on the back side of the cathode flow field plate 7, and between two adjacent self-breathing through holes 10, each upper channel 8 Below, the front of the cathode flow field plate 7 is provided with a lower channel 12, and the two adjacent upper channels 8 and the lower channels 12 are connected through round holes 11, so that liquid water can flow along the upper channel 8 and the lower channel 12. The lower channel 12 flows from the inside to the outside, and is prepared by micro-arc oxidation technology on the upper channel 8 for collecting liquid water, the lower channel 12, and the surface where the cathode flow field plate 7 and the cathode current collector plate 6 are in conta...

specific Embodiment approach 2

[0026] Specific embodiment two: The difference between this embodiment and specific embodiment one is: the electrolytic solution adopted during the micro-arc oxidation treatment of the cathode flow field plate 7 is 10 g / mL of sodium aluminate and 1 g / mL of sodium hypophosphite mixture.

specific Embodiment approach 3

[0027] Embodiment 3: The difference between this embodiment and Embodiments 1 and 2 is that the power source used in the micro-arc oxidation treatment of the cathode flow field plate 7 is a DC power supply, and the processing voltage is 300-600V.

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Abstract

The invention discloses a cathode water management structure of a passive alcohol type fuel battery. The cathode water management structure comprises a cathode current collecting plate and a cathode flow field plate, wherein a self-breathing through hole is formed in the cathode flow field plate, an upper channel for collecting liquid water is formed in the back surface of the cathode flow field plate, a lower channel for collecting the liquid water is formed in the positive surface of the cathode flow field plate, the upper channel and the lower channel are communicated by utilizing a circular hole, and a layer of oxide ceramic membrane is prepared on the upper channel, the lower channel and the surface of the cathode flow field plate, which is in contact with the cathode current collecting plate. The cathode water management structure disclosed by the invention solves the problem that a self-breathing passage of a cathode flow field is blocked due to liquid flooding, improves the mass transfer of oxygen and improves the performances of the battery.

Description

technical field [0001] The invention belongs to the field of proton exchange membrane fuel cells and relates to a cathode water management structure of passive alcohol fuel cells. Background technique [0002] With the rapid development of portable electronic technology, there is an increasing demand for high energy density miniature power supplies. It is difficult for traditional batteries to achieve long-term growth in energy density. Due to its simple structure, considerable energy density, and instant recharging, direct alcohol fuel cells have become a micro power source with great advantages. To make it more competitive, DMFCs can be run in passive mode, ie without auxiliary drive, relying on diffusion and natural convection to provide fuel and oxygen. In passive mode, the structure of the battery is simpler, but the lower mass transfer makes the battery lower in performance compared to active batteries. In passive alcohol fuel cells, liquid water droplets formed ins...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/04H01M4/86H01M8/0258H01M8/04119H01M8/1011
CPCH01M8/0258H01M8/04156Y02E60/50
Inventor 刘晓为袁玮键张雪林张宇峰王志刚
Owner INFORMATION SCI RES INST OF CETC
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