Polymeric electrolyte membrane fuel cell bulk metallic glass bipolar plate and manufacturing method thereof

A bulk metal, electrolyte membrane technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of reduced service life of polymer electrolyte membrane fuel cells, unsuitable for low-cost production, micropores and microcracks peeling off, etc. , to achieve the effects of low processing cost, low critical cooling rate, and strong crystallization inhibition ability

Inactive Publication Date: 2012-02-29
DALIAN JIAOTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Precious metal coatings are unsuitable for low-cost battery packs due to their high cost
Using PVD [5-10] , CVD [11-13] and plating [14，15] Nitride and oxide coatings prepared by different methods will generate unavoidable defects such as micropores and microcracks due to the limitation of the preparation process, which will peel off due to local corrosion, which will cause the service life of the polymer electrolyte membrane fuel cell. reduce
So far, there is no large-scale market application of metal bipolar plates with surface treatment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] According to the composition formula Zr 60-x Nb x Cu 20 Al 10 Ni 10 (x=0) The desired atomic molar ratio formulation. The purity of each element Zr, Nb, Cu, Ni, Al raw material is not lower than 99.95wt%. Master alloy ingots are arc melted under argon protection and remelted at least 3 times to ensure their chemical homogeneity. The vacuum electric arc furnace current is 150A. Then adopt Cu die casting to prepare a zirconium-based massive metallic glass plate with a thickness of 0.1-3mm. The anode polarization curve and the constant potential polarization under the working conditions of the polymer electrolyte membrane fuel cell are both at 0.05MH 2 SO 4 +2ppmF - in the solution. In order to simulate the working environment of polymer electrolyte membrane fuel cells, H2 was passed through the solution during all electrochemical experiments2 or air. Corrosion rate below 16μA / cm 2 . The conductivity is higher than 5000S / cm.

Embodiment 2

[0030] According to the composition formula Zr 60-x Nb x Cu 20 al 10 Ni 10 (x=5) The desired atomic molar ratio formulation. The purity of each element Zr, Nb, Cu, Ni, Al raw material is not lower than 99.95wt%. Master alloy ingots are arc melted under argon protection and remelted at least 3 times to ensure their chemical homogeneity. The vacuum electric arc furnace current is 150A. Then adopt Cu die casting to prepare a zirconium-based massive metallic glass plate with a thickness of 0.1-3mm. The anode polarization curve and the constant potential polarization under the working conditions of the polymer electrolyte membrane fuel cell are both at 0.05MH 2 SO 4 +2ppmF - in the solution. In order to simulate the working environment of polymer electrolyte membrane fuel cells, H2 was passed through the solution during all electrochemical experiments 2 or air. Corrosion rate below 16μA / cm 2 . The conductivity is higher than 5000S / cm.

Embodiment 3

[0032] According to the composition formula Zr 60-x Nb x Cu 20 al 10 Ni 10 (x=15) The desired atomic molar ratio formulation. The purity of each element Zr, Nb, Cu, Ni, Al raw material is not lower than 99.95wt%. Master alloy ingots are arc melted under argon protection and remelted at least 3 times to ensure their chemical homogeneity. The vacuum electric arc furnace current is 200A. Then adopt Cu die casting to prepare a zirconium-based massive metallic glass plate with a thickness of 0.1-3mm. The anode polarization curve and the potentiostatic polarization under the working condition of polymer electrolyte membrane fuel cell are both at 1MH 2 SO 4 +2ppmF - in the solution. In order to simulate the working environment of polymer electrolyte membrane fuel cells, H2 was passed through the solution during all electrochemical experiments 2 or air. Corrosion rate below 10μA / cm 2 . The conductivity is higher than 5000S / cm.

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Abstract

The invention discloses a polymeric electrolyte membrane fuel cell bulk metallic glass bipolar plate and a manufacturing method thereof. Materials are prepared according to a required atomic moore proportion of a composition formula, namely Zr60-xNbxCu20Al10Ni10 (x is equal to a value ranging from 0 to 20). A mother alloy ingot is smelted by electric arc under the protection of argon; and the mother alloy ingot is re-smelted for at least three times, so that the chemical uniformity can be guaranteed. Current of a vacuum electric arc furnace is 150 to 250 amperes; and a zirconium-base bulk metallic glass plate with a thickness of between 0.1 and 3 millimeters is cast and formed by a Cu die. The purity of elements, namely Zr, Nb, Cu, Ni and Al is more than or equal to 99.95 weight percent; the zirconium-base bulk metallic glass at least contains 95 vol percent of amorphous phase; a corrosion speed is lower than 16 mu A per square centimeters; and the conductivity is more than 5,000 S per centimeters. The polymeric electrolyte membrane fuel cell bulk metallic glass bipolar plate has higher conductivity and high corrosion resistance, and the cost can be reduced greatly; and the polymeric electrolyte membrane fuel cell bulk metallic glass bipolar plate can be applied to the field of manufacturing of fuel cells.

Description

technical field [0001] The invention belongs to the technical field of fuel cell electrodes. In particular, it relates to bipolar plates for polymer electrolyte membrane fuel cells. Background technique [0002] In addition to the characteristics of high energy conversion efficiency, long life, and environmental friendliness, polymer electrolyte membrane fuel cells are used as a power source for transportation and construction of decentralized power stations because of their low operating temperature and fast start-up. . However, factors such as high cost, weight, and volume largely limit the large-scale commercial application of polymer electrolyte membrane fuel cells. Therefore, cost reduction has become the focus of governments and researchers. [0003] The bipolar plate is one of the important multifunctional components in the polymer electrolyte membrane fuel cell. It not only has the functions of separating the reactant gas, collecting electricity, supporting the me...

Claims

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Application Information

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IPC IPC(8): H01M4/86H01M4/88
CPCY02E60/50
Inventor 田如锦
Owner DALIAN JIAOTONG UNIVERSITY
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