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Method for Improving Density and Corrosion Resistance of Fuel Cell Metal Bipolar Plate Surface Coating

A metal bipolar plate, fuel cell technology, used in battery electrodes, circuits, electrical components, etc., can solve the problems of insufficient corrosion resistance of the oxide layer, pits, pinholes, particles, and improve the life of the electrode plate. Improved performance, low cost, and improved corrosion resistance

Active Publication Date: 2018-09-11
SHANGHAI H-RISE NEW ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

No matter what kind of coating method is used, after the coating process is completed, there must be defects in the film layer, such as pits, pinholes, particles, metal substrate leakage and other defects
This method can improve the corrosion resistance of the plate surface to a certain extent, but in some harsh environments, the corrosion resistance of the oxide layer alone is not enough to substantially improve the life of the plate

Method used

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  • Method for Improving Density and Corrosion Resistance of Fuel Cell Metal Bipolar Plate Surface Coating
  • Method for Improving Density and Corrosion Resistance of Fuel Cell Metal Bipolar Plate Surface Coating
  • Method for Improving Density and Corrosion Resistance of Fuel Cell Metal Bipolar Plate Surface Coating

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Experimental program
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Effect test

Embodiment 1

[0037] (1) Put the stainless steel metal bipolar plate after ultrasonic cleaning into the unbalanced magnetron sputtering ion plating furnace cavity, vacuumize to 3×10-5torr, fill with argon, and keep the working pressure at 4×10-4torr , the bias voltage is -500V, the passivation layer is removed by ion bombardment, the ion plating sputtering cleaning process time is 30min, the sample is hung on the rotating support, and the support speed is 4r / min.

[0038] (2) Keep the bias voltage at -100V, turn on the Ti target current, and gradually increase the current from 0A to 5A, deposit a Ti layer on the surface of the metal plate, the deposition time is 15min, and the working pressure is maintained at 0.1Pa.

[0039] (3) put the pole plate behind the metal Ti layer into the vacuum anode layer ion source furnace chamber, feed 100sccm argon as the ion source of bombardment, increase the voltage of the ion source to be 1800V and the furnace chamber temperature to increase the ion energ...

Embodiment 2

[0042] (1) Put the stainless steel metal bipolar plate after ultrasonic cleaning into the unbalanced magnetron sputtering ion plating furnace cavity, vacuumize to 3×10-5torr, fill with argon, and keep the working pressure at 4×10-4torr , the bias voltage is -500V, the passivation layer is removed by ion bombardment, the ion plating sputtering cleaning process time is 30min, the sample is hung on the rotating support, and the support speed is 4r / min.

[0043] (2) Keep the bias voltage at -80V, turn on the Cr target current, and gradually increase the current from 0A to 6A, deposit a Cr layer on the surface of the metal plate, the deposition time is 5min, and the working pressure is maintained at 0.1Pa.

[0044] (3) put the polar plate after depositing the metal Cr layer into the vacuum anode layer ion source furnace chamber, feed 100sccm argon as the ion source of bombardment, increase the voltage of the ion source to be 1800V and the furnace chamber temperature to increase the ...

Embodiment 3

[0047] (1) Put the stainless steel metal bipolar plate after ultrasonic cleaning into the unbalanced magnetron sputtering ion plating furnace cavity, vacuumize to 3×10-5torr, fill with argon, and keep the working pressure at 4×10-4torr , the bias voltage is -500V, the passivation layer is removed by ion bombardment, the ion plating sputtering cleaning process time is 30min, the sample is hung on the rotating support, and the support speed is 4r / min.

[0048] (2) Keep the bias voltage at -100V, turn on the Ti target current, and gradually increase the current from 0A to 5A, deposit a Ti layer on the surface of the metal plate, the deposition time is 15min, and the working pressure is maintained at 0.1Pa.

[0049] (3) put the pole plate behind the metal Ti layer into the vacuum anode layer ion source furnace chamber, feed 100sccm argon as the ion source of bombardment, increase the voltage of the ion source to be 1800V and the furnace chamber temperature to increase the ion energ...

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Abstract

The present invention relates to a method for enhancing compactness and corrosion resistance of a surface coating of a metal bipolar plate of a fuel battery. A metal plate plated with a coating is treated according to the following steps: first, bombarding with rare gas ions to change the compactness and crystalline structure of the coating; second, selectively depositing precious metal particles in microholes on the surface of the coating; and third, inletting gases of relatively active chemical property to combine with an initial coating to reduce surface energy. The foregoing describes the treatment of the surface coating of the metal bipolar plate of the battery. Compared with the prior art, the method improves the corrosion resistance of the fuel battery plate by enhancing the compactness of the coating.

Description

technical field [0001] The invention belongs to the technical field of fuel cells, and in particular relates to a method for improving the density and corrosion resistance of the coating on the surface of a metal bipolar plate of a fuel cell. Background technique [0002] With the shortage of energy, new energy technologies represented by hydrogen energy have received more and more attention. Proton Exchange Membrane Fuel Cell (PEMFC) can directly convert the chemical energy in hydrogen into electrical energy without combustion, and its energy conversion efficiency is not limited by the Carnot cycle, and the power generation efficiency of the battery pack can reach 50 More than %, the only product is water, which is very friendly to the environment. PEMFC has low operating temperature, fast start-up speed, and long working life. It is an ideal mobile power supply and independent power supply device. It has broad application prospects in the fields of transportation, electro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/88
CPCH01M4/8875Y02E60/50
Inventor 来新民张頔毕飞飞易培云彭林法
Owner SHANGHAI H-RISE NEW ENERGY TECH CO LTD