Composite graphite material for bipolar plate of fuel cell and preparation method of composite graphite material

A composite graphite and fuel cell technology, applied in fuel cells, circuits, electrical components, etc., can solve the problems of material toughness and airtightness not meeting the requirements, poor toughness, low conductivity, etc.

Pending Publication Date: 2021-10-26
ZHEJIANG HAROG TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Both thermosetting resin and graphite have the advantages of good corrosion resistance. In the prior art, if the composite graphite bipolar plate wants to have high electrical conductivity and high thermal conductivity, the proportion of graphite material in the composite material needs to be increased. At the same time, the conten...

Method used

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  • Composite graphite material for bipolar plate of fuel cell and preparation method of composite graphite material

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Comparison scheme
Effect test

Embodiment 1

[0023] A composite graphite material for a fuel cell bipolar plate, comprising composite resin and conductive filler, the mass ratio of the composite resin to conductive filler is 25:65, and the composite resin amount includes 2 parts by weight of phenolic resin , 0.3 parts of acrylic acid, 6.0 parts of epoxy resin, the conductive filler includes 7.5 parts of expanded graphite powder, 0.2 part of graphene, 0.4 part of carbon microspheres, and 0.6 part of carbon black powder by weight.

[0024] A method for preparing a composite graphite material based on the aforesaid fuel cell bipolar plate, comprising the following steps:

[0025] (1) The phenolic resin solution, acrylic acid solution, epoxy resin solution, solubilizer, toughener, and antioxidant are sprayed into the negative pressure resin mixer according to a certain mass fraction ratio through a controllable multi-channel injector to obtain a composite resin solution , the pressure of the negative pressure resin stirrer i...

Embodiment 2

[0031] A composite graphite material for a fuel cell bipolar plate, comprising composite resin and conductive filler, the mass ratio of the composite resin to conductive filler is 27:73, and the composite resin amount includes 2.5 parts by weight of phenolic resin , 0.5 parts of acrylic acid, 7.0 parts of epoxy resin, the conductive filler includes 8.5 parts of expanded graphite powder, 0.1 part of graphene, 0.5 part of carbon microspheres, and 0.9 part of carbon black powder by weight.

[0032] A method for preparing a composite graphite material based on the aforesaid fuel cell bipolar plate, comprising the following steps:

[0033] (1) The phenolic resin solution, acrylic acid solution, epoxy resin solution, solubilizer, toughener, and antioxidant are sprayed into the negative pressure resin mixer according to a certain mass fraction ratio through a controllable multi-channel injector to obtain a composite resin solution , the pressure of the negative pressure resin agitato...

Embodiment 3

[0039] A composite graphite material for a fuel cell bipolar plate, comprising composite resin and conductive filler, the mass ratio of the composite resin and conductive filler is 25:60, and the composite resin amount includes 2.3 parts by weight of phenolic resin , 0.4 part of acrylic acid, 6.5 parts of epoxy resin, described conductive filler comprises 8 parts of expanded graphite powder, 0.15 part of graphene, 0.45 part of carbon microsphere, 0.7 part of carbon black powder by weight.

[0040] The mass ratio of the composite resin to the conductive filler is 27:73, the composite resin amount includes 2.5 parts by weight of phenolic resin, 0.5 part of acrylic acid, and 7.0 parts of epoxy resin, and the conductive filler includes expansion by weight. 8.5 parts of graphite powder, 0.1 part of graphene, 0.5 parts of carbon microspheres, and 0.9 parts of carbon black powder.

[0041] A method for preparing a composite graphite material based on the aforesaid fuel cell bipolar p...

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PUM

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Abstract

The invention provides a composite graphite material for a fuel cell bipolar plate and a preparation method of the composite graphite material, and belongs to the field of novel composite graphite materials. The invention relates to a composite graphite material for a bipolar plate of a fuel cell, which comprises composite resin and a conductive filler. The invention also provides a preparation method of the composite graphite material for the bipolar plate of the fuel cell, which comprises the following steps: (1) mixing a phenolic resin solution, an acrylic acid solution and an epoxy resin solution to obtain a composite resin solution; (2) putting graphite powder, graphene, carbon microspheres and carbon black powder into a positive pressure stirrer to obtain a conductive filler; (3) grading and mixing the composite resin solution and conductive filler, and curing to obtain a composite graphite material; and according to the invention, the contact uniformity and the fitting degree are ensured. The prepared composite graphite material is high in corrosion resistance, high in toughness, good in compactness and high in conductivity.

Description

technical field [0001] The invention belongs to the field of novel composite graphite materials, and in particular relates to a composite graphite material for fuel cell bipolar plates and a preparation method thereof. Background technique [0002] Proton exchange membrane fuel cells directly convert the chemical energy in hydrogen and oxygen into electrical energy without being limited by the Carnot cycle, so they have high energy conversion efficiency and are environmentally friendly, and can be widely used in transportation and ground power generation. However, the voltage of a single battery is low (0.6V ~ 1.0V). Therefore, in order to obtain a practical voltage, it is necessary to connect multiple single batteries in series. , oxygen, collecting current and supporting membrane electrodes, and also responsible for the heat dissipation and drainage functions of the entire battery system. Therefore, the bipolar plate material needs to be corrosion-resistant, conductive, go...

Claims

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Application Information

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IPC IPC(8): H01M8/0234H01M8/0239H01M8/0243H01M8/0245
CPCH01M8/0234H01M8/0245H01M8/0243H01M8/0239Y02E60/50
Inventor 周志强
Owner ZHEJIANG HAROG TECH CO LTD
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