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Preparation method of anti-corrosion grapheme unipolar plate with high conductivity, high thermal conductivity and high air tightness and hydrogen fuel cell

A graphene, high thermal conductivity technology, used in fuel cells, electrical components, battery electrodes, etc., can solve the problems of low hydrogen utilization, low electrical conductivity, low thermal conductivity of bipolar plates, etc., to achieve high crystallinity, thermal conductivity, etc. The effect of improved performance, increased efficiency and service life

Active Publication Date: 2019-06-07
山东国烯新材料创新中心有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the problems of low thermal conductivity, low electrical conductivity, and low hydrogen utilization rate of the above-mentioned hydrogen fuel cell bipolar plate, the present invention provides a method for preparing a high-conductivity, high-thermal-conductivity, high-air-tightness and corrosion-resistant graphene monopolar plate and hydrogen fuel cells

Method used

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  • Preparation method of anti-corrosion grapheme unipolar plate with high conductivity, high thermal conductivity and high air tightness and hydrogen fuel cell
  • Preparation method of anti-corrosion grapheme unipolar plate with high conductivity, high thermal conductivity and high air tightness and hydrogen fuel cell
  • Preparation method of anti-corrosion grapheme unipolar plate with high conductivity, high thermal conductivity and high air tightness and hydrogen fuel cell

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specific Embodiment approach 1

[0027] Specific embodiment one: what this embodiment records is a kind of preparation method of high electrical conductivity, high thermal conductivity, high air tightness and corrosion-resistant graphene unipolar plate, and the steps of the method are as follows:

[0028] Step 1: Mold preparation: Prepare the corresponding graphite mold according to the shape and size of the unipolar plate, and the graphite is high-strength graphite;

[0029] Step 2: Filling: spread the graphene powder evenly in the graphite mold, and scrape the surface;

[0030] Step 3: Preforming: Use a press to apply a pressure of 0.5~1MPa to the filler in step 2 at room temperature, pressurize at a constant speed of 5~20mm / min, and keep the pressure for 1~5min after reaching the given pressure Preformed into a graphene plate and taken out from the mold; the preforming process can discharge most of the gas inside the powder, and during the process of gas discharge, the flow of the gas can drive the graphen...

specific Embodiment approach 2

[0034] Specific embodiment two: the preparation method of a kind of high electrical conductivity, high thermal conductivity, high air-tightness and corrosion-resistant graphene unipolar plate described in specific embodiment one, in step five, described hot pressing sintering is: from room temperature to 8 ~ The heating rate of 20 ℃ / min is raised to 600 ℃ ~ 2500 ℃, pressurized, the pressure is 20MPa ~ 60MPa, the heat preservation and pressure holding time is 30 ~ 120min, the whole hot pressing sintering process is carried out in a vacuum environment or an inert atmosphere.

specific Embodiment approach 3

[0035] Specific embodiment three: the preparation method of a high-conductivity, high-thermal-conductivity, high-air-tightness and corrosion-resistant graphene monopolar plate described in specific embodiment one, inside the graphene bipolar plate, graphene is along the plane direction (XY direction) Highly directional arrangement.

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Abstract

The present invention mainly relates to a preparation method of an anti-corrosion grapheme unipolar plate with high conductivity, high thermal conductivity and high air tightness. The objective of theinvention is to solve the problems that a traditional bipolar plate is poor in electric conductivity, thermal conductivity, air tightness and corrosion resistance. The method comprises the steps of:preparing a graphite die; performing filling (few layers of grapheme powder bodies), performing preforming to form a plate shape, performing presintering to remove a dispersing agent, performing in-situ densifying molding, performing machining to form a finished product, and performing bipolar plate assembling. The present invention further discloses a fuel cell comprising the bipolar plate. The bipolar plate improves one magnitude compared to a traditional bipolar plate in the heat conductivity and the electric conductivity, and has very high air tightness and excellent corrosion resistance so as to improve the energy conversion efficiency, the service life and the use safety of the hydrogen fuel cell and enlarge the application range of the hydrogen fuel cell.

Description

technical field [0001] The invention belongs to the technical field of hydrogen fuel cell material preparation, and in particular relates to a method for preparing a high-conductivity, high-thermal-conductivity, high-air-tightness and corrosion-resistant graphene monopolar plate and a hydrogen fuel cell. Background technique [0002] In the environment of increasingly high environmental protection requirements, fuel cells have gradually attracted the attention of academia and industry due to their advantages such as high power generation efficiency and no environmental pollution, and have been applied in aerospace, electric vehicles and other fields. It has broad application prospects. The core component of a hydrogen fuel cell is the bipolar plate. A bipolar plate is composed of two electrode plates with a proton exchange membrane sandwiched between them. Among them, the electrode plate plays the role of supporting the oxidizing agent and reducing agent and guiding the fl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/86H01M4/88H01M4/96H01M8/0234
CPCY02E60/50Y02P70/50
Inventor 李宜彬
Owner 山东国烯新材料创新中心有限公司
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