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Dotted conductive composite coating for fuel cell metal plate

A metal plate and composite coating technology, which is used in fuel cell components, fuel cells, battery electrodes, etc., can solve the problems of difficulty in meeting the commercialization needs of metal plates, coating surface oxidation, and increased contact resistance. Achieve the effect of good electrical conductivity, strong corrosion resistance and good durability

Inactive Publication Date: 2018-02-09
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, due to the occurrence of corrosion, the surface of the coating will be oxidized, resulting in an increase in contact resistance.
[0004] Electroplating gold on the surface is a common preparation process

Method used

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  • Dotted conductive composite coating for fuel cell metal plate
  • Dotted conductive composite coating for fuel cell metal plate
  • Dotted conductive composite coating for fuel cell metal plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A dot-shaped conductive composite coating for metal pole plates of fuel cells, its structure is as follows Figure 1-2 As shown, the point-shaped conductive composite coating is firstly deposited on the upper surface of the metal plate 1-1 with a metal layer 1-2, and in this embodiment, a metal W with a thickness of 5 nm is deposited. Then, point metals 1-3 are deposited on the pre-deposited coating. In this embodiment, the noble metal Pt with a thickness of 1 nm is deposited.

Embodiment 2

[0043] A dot-shaped conductive composite coating for metal pole plates of fuel cells, its structure is as follows Figure 3-4 As shown, the dot-shaped conductive composite coating is firstly deposited on the upper surface of the metal pole plate 2-1 with a metal layer 2-2, and metal Ni with a thickness of 10 nm is deposited. Then deposit point-like metal 2-3 on the pre-deposited coating, what is deposited is noble metal Y with a thickness of 1nm, and the coverage is 10%, and then continue to deposit metal layer 2-4 on the point-like metal 2-3 , the metal Nb with a thickness of 10 nm is deposited, and the dot-like metal 2-5 is deposited on the metal layer 2-4, and the noble metal Ag with a thickness of 10 nm is deposited.

Embodiment 3

[0045] A dot-shaped conductive composite coating for metal pole plates of fuel cells, its structure is as follows Figure 5-6 As shown, the dot-shaped conductive composite coating first pre-deposits an oxide layer 3-2 on the upper surface of the metal plate 3-1, and what is deposited is WO with a thickness of 1nm. 2 , and then deposit point-like metal 3-3 on the pre-deposited coating, which is the noble metal Au with a thickness of 10nm, embedded between oxides.

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Abstract

The invention relates to a dotted conductive composite coating for a fuel cell metal plate. The dotted conductive composite coating is formed by firstly depositing a metal layer, a metal oxide layer or a conductive nonmetal layer on the upper surface of a metal plate in advance and then depositing dotted metal on the coating deposited in advance. Compared with the prior art, the dotted conductivecomposite coating has more excellent conductivity and corrosion resistance, especially high potential corrosion resistance; and the durability of the metal plate in an acid environment of a fuel cellis significantly strengthened. Meanwhile, according to the prepared dotted conductive coating, use of noble metal can be significantly reduced and the cost of the coating can be reduced.

Description

technical field [0001] The invention relates to a surface coating of a metal pole plate of a fuel cell, in particular to a dot-like conductive composite coating for a metal pole plate of a fuel cell, which is used to reduce the contact resistance between the metal pole plate of a fuel cell and a gas diffusion layer. At the same time, the durability of the metal plate in acidic environment is improved. Background technique [0002] Metal bipolar plates have the characteristics of good mechanical properties, low cost, and small mass, and are gradually considered to be the first choice for the industrialization of fuel cells. The working environment of the metal bipolar plate of the fuel cell is a high-temperature and high-humidity environment with pH 2-5, 70-100°C. The surface of the metal material will be passivated, which will increase the contact resistance and reduce the output performance of the battery. At the same time, the metal material corrodes in the acidic environ...

Claims

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Application Information

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IPC IPC(8): H01M8/0228H01M8/0206H01M4/88
CPCH01M4/8803H01M8/0206H01M8/0228Y02E60/50
Inventor 易培云毕飞飞邱殿凯彭林法来新民
Owner SHANGHAI JIAO TONG UNIV
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