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Fuel cell plate forming method based on expanded graphite

A fuel cell electrode plate and expanded graphite technology, applied in fuel cells, circuits, electrical components, etc., can solve problems affecting mass production scale, and achieve the effects of pipeline operation, good air permeability and conductivity, and improved production efficiency

Active Publication Date: 2021-07-09
SHANGHAI SHENLI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The contradictory relationship between the impregnation time and the gas permeability and conductivity of the bipolar plate made by the latter impregnation method will inevitably affect its mass production scale.

Method used

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  • Fuel cell plate forming method based on expanded graphite

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Effect test

Embodiment 1

[0023] A fuel cell polar plate forming method based on expanded graphite, comprising the following steps:

[0024] (1) Powder vacuum impregnation: Put the raw material powder of the graphite plate of the fuel cell into the reactor, evacuate and maintain it for 10-30 minutes, inject liquid resin without releasing the vacuum, so that the raw material powder can be completely submerged; pressurize to Maintain 0.5-1MPa for 8-12 minutes, and then release the pressure to obtain "wet material" for use; the raw material of the fuel cell graphite plate is conventional graphite plate formula fuel, and the graphite powder used is worm graphite powder.

[0025] (2) Plate making: the wet material is extruded through a filter press to form an expanded graphite plate, and excess resin will also be squeezed out to reduce the resin content in the plate;

[0026] (3) Cutting and molding: the expanded graphite plate obtained in step (2) is divided into the size required by the fuel cell pole pla...

Embodiment 2

[0029] A fuel cell polar plate forming method based on expanded graphite, comprising the following steps:

[0030] (1) Powder vacuum impregnation: Put the raw material powder of the graphite plate of the fuel cell into the reactor, evacuate and maintain it for 10-30 minutes, inject the liquid resin without releasing the vacuum, so that the raw material powder can be completely submerged, and mix thoroughly The vacuum is released to obtain "wet material" for later use; the raw material of the fuel cell graphite plate is conventional graphite plate formula fuel, and the graphite powder used is worm graphite powder.

[0031] (2) Plate making: the wet material is extruded into expanded graphite plates by rolling to control the thickness, during which excess resin will also be squeezed out to reduce the resin content in the plate;

[0032] (3) Cutting and molding: the expanded graphite plate obtained in step (2) is divided into the size required by the fuel cell pole plate using a ...

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Abstract

The present invention relates to the forming method of the fuel cell pole plate based on expanded graphite, comprising the following steps: (1) powder vacuum impregnation: put the raw material powder of the fuel cell graphite plate into the reactor, vacuumize and maintain it for 10-30 minutes. Inject liquid resin under vacuum conditions so that the raw material powder can be completely submerged; release the vacuum after fully mixing to obtain "wet material" for later use; (2) plate making: the wet material is made into expanded graphite plate by extrusion; (3 ) cutting and forming; (4) curing. Compared with the prior art, the substrate prepared by the method of the invention has the advantages of good electrical conductivity, strength and sealing performance.

Description

technical field [0001] The invention relates to a fuel cell, in particular to a fuel cell electrode plate forming method based on expanded graphite. Background technique [0002] A fuel cell is an electrochemical power generation device that directly converts chemical energy into electrical energy isothermally and electrochemically, with a high energy conversion efficiency of up to 40%-60%. The fuel cell is environmentally friendly, hardly emitting harmful gases such as nitrogen oxides or sulfur oxides, and the emission of carbon dioxide is low. The fuel of the fuel cell can be continuously supplied from the outside, which can continuously provide energy. Therefore, the research and development of fuel cells are favored, and they are considered to be the preferred efficient and clean power generation devices in the 21st century. [0003] Among them, the bipolar plate is one of the important components of the fuel cell, and its performance restricts the commercialization pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C48/07B29C69/02H01M8/0258H01M8/0213
CPCY02E60/50
Inventor 甘全全李丽周斌戴威
Owner SHANGHAI SHENLI TECH CO LTD
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