Composite fuel cell

A fuel cell and composite technology, applied in the direction of fuel cells, fuel cell additives, solid electrolyte fuel cells, etc., can solve problems affecting the working efficiency of fuel cells, complex water and heat management, etc., to achieve simple water and heat management, chemical reaction The effect of fast speed and low cost

Inactive Publication Date: 2013-06-12
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The unbalanced distribution of water between the positive and negative stages of the AAEM membrane will also cause the same problems as the PEM membrane, which will affect the working efficiency of the fuel cell.
Hydrothermal management will also become complicated, as attached figure 1 shown

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment

[0035] In this embodiment, methanol is used as fuel, and experiments are carried out on the fuel cell using the PEM membrane alone, the fuel cell using the AAEM membrane alone and the novel composite fuel cell of the present invention. In the new hybrid fuel cell, select the attached image 3 In the structure shown in -5, two exchange membranes are respectively selected to form a composite fuel cell, an alkaline anion membrane and a catalytic layer and a diffusion layer 1, an alkaline anion membrane and a catalytic layer and a diffusion layer 3, a proton exchange membrane and a catalytic layer and Diffusion layer 2, proton exchange membrane and catalytic layer and diffusion layer 4. PEM membrane part adopts 117 membrane, the anode catalyst is carbon-based platinum ruthenium alloy, the cathode catalyst is carbon-based platinum, and the total reaction activation area is 8.167cm 2 . AAEM film part adopts A201 film, its thickness is made and The 117 membrane is the same, the...

Embodiment 2

[0039] In this example, under different current densities, when methanol and hydrogen are used as fuels (that is, methanol and hydrogen are used as the anode fluid, and air is used as the cathode fluid), the PEM membrane fuel cell is used alone, the amount of water required for the anode to be humidified and The amount of water that needs to be drained from the cathode; using the AAEM membrane fuel cell alone, the amount of water that needs to be humidified at the cathode and the amount of water that needs to be drained from the anode, as well as the amount of water that needs to be humidified and drained from the corresponding part of the new composite fuel cell.

[0040] When methanol is used as fuel, the data are as follows:

[0041] Table 1 The amount of water required for humidification of the tested fuel cell (g / s)

[0042]

[0043] Table 2 The amount of water to be drained by the tested fuel cell (g / s)

[0044]

[0045] As can be seen from the above data, the nov...

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PUM

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Abstract

The invention discloses a composite fuel cell. A circulation is formed by a PEM membrane fuel cell and an AAEM membrane fuel cell which are adjacent to each other by utilizing different water generation volumes at the cathodes and the anodes of the PEM membrane fuel cell and the AAEM membrane fuel cell, and a coiled pipeline is arranged on a carbon plate to enable fluid to drive water to flow between two exchange membranes so as to supplement the water consumed at the AAEM cathode by utilizing water generated at the PEM membrane cathode, and also supplement water required for humidifying the PEM membrane anode by utilizing water generated at the AAEM membrane anode.

Description

technical field [0001] The invention belongs to the field of fuel cells, and more specifically relates to a novel composite fuel cell, which has the characteristics of self-optimization of water management. Background technique [0002] Current proton exchange membrane (Proton Exchange Membrane, PEM) fuel cells produce water at the cathode and consume water at the anode. At the same time, due to the effect of electro-osmotic drag (EOD), part of the water in the anode will be dragged to the cathode, so that there will be more water in the cathode and less water in the anode, which will cause a large amount of liquid water to accumulate on the cathode and affect the reaction. Fluid transport, which in turn affects the working efficiency of the fuel cell. At the same time, the unbalanced distribution of water between the positive and negative stages of the PEM membrane will increase the resistance of the membrane itself, causing local overheating and damage to the PEM membrane...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/10H01M8/04H01M8/0258H01M8/04291
CPCY02E60/50
Inventor 焦魁王大为邓豪
Owner TIANJIN UNIV
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