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Water transmission plate using thermoplastic resin as binder and preparation thereof

A thermoplastic resin and water transfer plate technology, which is applied to the parts of fuel cells and other directions, can solve the problems of increasing graphite resistance, brittleness of graphite plates, and high cost, and achieve the effects of high preparation efficiency, good water permeability, and stable operation.

Inactive Publication Date: 2013-06-05
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this solution is difficult and expensive due to the inhomogeneity of the plate elements
In ZL 99807423.3, graphite powder, cellulosic fibers, reinforcing fibers and thermosetting resin are used to manufacture a water transport plate for solid polymer electrolyte fuel cells, which has good bubble pressure, water permeability, median pore size, porosity, Through-plane resistivity and compressive yield strength, but it must go through the carbonization step, and the carbonized graphite plate is relatively brittle
CN200680049748.4 By properly selecting graphite particles or pretreating graphite particles, at least a part of the graphite particles in the product have a satisfactory wettability so that the product has hydrophilicity or wettability, but graphite The pretreatment of the particles will increase the resistance of the graphite, resulting in a higher resistance of the product

Method used

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  • Water transmission plate using thermoplastic resin as binder and preparation thereof
  • Water transmission plate using thermoplastic resin as binder and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Mix 8g of apricot shell carbon with a particle size of 1μm, 1.2g of polypropylene, and 0.8g of reinforcing fibers with a diameter of 110nm and a length of 3μm, then place the mixture in a mold, and heat the mold at 120°C and 8MPa Press for 30 minutes, demould, and the thickness of the prepared plate is 1.37mm, and parallel strip flow channels are distributed on the surface.

Embodiment 2

[0028] Mix 8g of coal-based carbon with a particle size of 75μm, 1.4g of thermoplastic phenolic resin, and 0.6g of reinforcing fibers with a diameter of 11-15μm and a length of 100μm, then place the mixture in a mold, and place the mold at 160°C, Hot pressing at 4 MPa for 20 minutes, demoulding, the thickness of the prepared plate is 1.42 mm, and parallel strip flow channels are distributed on the surface.

Embodiment 3

[0030] Mix 7.4g of coal-based carbon with a particle size of 75μm, 1.4g of thermoplastic phenolic resin, and 1.2g of reinforcing fibers with a diameter of 11-15μm and a length of 100μm, and then place the mixture in a mold, and place the mold at 160°C , hot pressing at 4MPa for 20min, demoulding, the thickness of the prepared plate is 1.39mm, and parallel strip flow channels are distributed on the surface.

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Abstract

The invention relates to a water transmission plate using thermoplastic resin as a binder and preparation of the water transmission plate. According to an optimal preparation method, hydrophilic carbon powder, reinforced fibers and the thermoplastic resin are mixed, and are in formed in a mold in a hot-press mode after being evenly mixed. The water transmission plate using the thermoplastic resin as the binder is used as a solid polymer electrolyte fuel cell bipolar plate, and has good water permeability and air resistant properties.

Description

technical field [0001] The invention relates to a water transmission plate with a thermoplastic resin as a binder and its preparation, in particular to a preparation method of a water-permeable and gas-blocking composite plate, which can be applied to a solid polymer electrolyte fuel cell. Background technique [0002] Proton exchange membrane fuel cell (PEMFC) can directly convert chemical energy into electrical energy without being limited by the Carnot cycle, with high energy conversion efficiency and almost zero pollution to the environment; at the same time, PEMFC also has low-temperature fast start, low noise, With the advantages of high power density, it is one of the most potential chemical power sources for electric vehicle power sources, portable small power sources, and underwater power systems. Therefore, it has been widely concerned by governments and various aspects of the world, and the technology has developed rapidly. [0003] In a proton exchange membrane ...

Claims

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Application Information

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IPC IPC(8): H01M8/02
CPCY02E60/50
Inventor 俞红梅邵志刚秦晓平王永丰衣宝廉
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI