Fuel cell pole plate forming method based on expanded graphite

A fuel cell electrode plate, 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, improved production efficiency, good air permeability and electrical conductivity

Active Publication Date: 2019-06-21
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 pole plate forming method based on expanded graphite

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The fuel cell electrode plate forming method based on expanded graphite includes the following steps:

[0024] (1) Powder vacuum impregnation: Put the raw material powder of the fuel cell graphite board into the reactor, vacuum and maintain for 10-30 minutes, inject the liquid resin without releasing the vacuum, so that the raw material powder can be completely immersed; 0.5-1MPa is maintained for 8-12 minutes, and then the pressure is released 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 vermicular graphite powder.

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

[0026] (3) Cutting and forming: The expanded graphite plate obtained in step (2) is divided into the required size of the fuel cell electrode plate by a...

Embodiment 2

[0029] The fuel cell electrode plate forming method based on expanded graphite includes the following steps:

[0030] (1) Powder vacuum impregnation: Put the raw material powder of the fuel cell graphite board into the reactor, vacuum and maintain for 10-30 minutes, and inject the liquid resin without releasing the vacuum, so that the raw material powder can be completely immersed, and then fully mixed The vacuum is released 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 vermicular graphite powder.

[0031] (2) Plate making: Extruding the wet material into an expanded graphite plate by rolling and controlling the thickness, during which excess resin will be extruded to reduce the resin content in the plate;

[0032] (3) Cutting and forming: The expanded graphite plate obtained in step (2) is divided into the required size of the fuel cell electrode plate by a knife edge mo...

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PUM

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Abstract

The invention relates to a fuel cell pole plate forming method based on expanded graphite. The fuel cell pole plate forming method comprises the following steps of (1) powder vacuum impregnation, wherein putting raw material powder of a fuel cell graphite plate into a reaction kettle, vacuumizing and maintaining for 10-30 minutes, and injecting the liquid resin under the condition that the vacuumcondition is not released, so that the raw material powder can be completely immersed; fully mixing and releasing the vacuum to obtain a wet material for later use; (1) preparing a plate, wherein preparing the wet material into an expanded graphite plate through an extrusion method; (3) cutting and forming; and (4) curing. Compared with the prior art, the substrate prepared by the fuel cell pole plate forming method has the advantages of being conductive, high in strength, good in sealing performance and the like.

Description

Technical field [0001] The invention relates to a fuel cell, in particular to a method for forming a fuel cell electrode plate based on expanded graphite. Background technique [0002] A fuel cell is an electrochemical power generation device that directly converts chemical energy into electrical energy in an electrochemical manner isothermally, with a high energy conversion efficiency of 40%-60%. The fuel cell is environmentally friendly and hardly emits harmful gases such as nitrogen oxides or sulfur oxides, and has low carbon dioxide emissions. The fuel of the fuel cell can be continuously supplied from the outside and can continuously provide energy. Therefore, the research and development of fuel cells are favored, and they are considered to be the first choice for 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 of ...

Claims

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Application Information

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Patent Type & Authority Applications(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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