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Conductivity composite material

A technology of conductive composite materials and conductive fillers, applied in the direction of conductive coatings, conductive adhesives, conductive materials dispersed in non-conductive inorganic materials, etc., can solve the problems of bending and insufficient conductivity, and achieve high conductivity Effect

Active Publication Date: 2012-05-23
IND TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] In order to solve the problem of insufficient bending and conductivity of the conductive composite material in the conventional technology, the purpose of the present invention is to provide a conductive composite material with flexibility, high conductivity, corrosion resistance, air tightness, and light weight. , high mechanical strength and low surface roughness, etc., directly blended with graphite in the resin, and can be made into a high-conductivity bipolar plate after hardening and molding with a mold

Method used

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  • Conductivity composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Example 1 : Sheet made of VTBN-styrene-divinylbenzene copolymer and carbon material containing expanded graphite

[0050] Preparation of expanded graphite:

[0051] Put 200g of purchased graphite oxide into a 3-liter stainless steel tank, quickly put it into a high-temperature furnace at 1000°C, and heat it under air for 60 seconds to make it expand. After the expansion is complete, take it out and cool it at room temperature for later use.

[0052] Preparation of bipolar plates:

[0053] VTBN-styrene-divinylbenzene copolymer is kneaded with carbon material powder to form a homogeneous molding mixture (BMC, bulk molding compound), wherein the content of the carbon material (graphite powder+expanded graphite+carbon fiber) is 75% by weight. The free radical initiator is tert-butyl peroxybenzoate (TBPB), the solvent is styrene, and the release agent is fluorine wax. The selection principles of the above materials are not only suitable for the properties of the bip...

Embodiment 2

[0077] Example 2 : Plate made of VTBN-styrene copolymer and carbon material

[0078] VTBN-styrene copolymer is kneaded with carbon material to form a uniform molding mixture (BMC, bulk molding compound), wherein the content of carbon material (graphite powder + carbon fiber) is 75% by weight. The free radical initiator is tert-butyl peroxybenzoate (TBPB), the solvent is styrene, and the release agent is fluorine wax. The selection principles of the above materials are not only suitable for the properties of the bipolar plate, but also the reasonable price is also a consideration; the ratio of various materials is shown in Table 3.

[0079] Table three

[0080] Material

Example 2

Comparative example 2

Comparative example 3

Graphite powder + carbon fiber

75％

75％

75％

VTBN

12.5％

Rubber reinforced vinyl ester based resin

15％

vinyl ester resin

15％

Styrene monomer

12.5％

...

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Abstract

The invention relates to a conductive composite material which contains 5-40wt% of multipolymer and 60-95wt% of filler; wherein, the multipolymer is chosen from the multipolymer of end ethylene modifier rubber- styrene- divinylbenzene, the multipolymer of end ethylene modifier rubber- styrene, or the multipolymer of styrene- divinylbenzene. The flexible conductive composite material has the characteristics of high conductivity, high mechanical strength, flexible property and the like, and can be mixed with graphite molecules to form a conductive bipolar plate. The invention also relates to anelectrode which is formed by the conductive composite material.

Description

technical field [0001] The present invention relates to the preparation of polymer composite materials, in particular to a copolymer utilizing terminal ethylene-modified rubber-styrene-divinylbenzene, a terminal ethylene-modified rubber-styrene copolymer or styrene-divinylbenzene Conductive composite materials made of copolymers and conductive fillers can be used as electrodes in electrochemical reactions, and are mostly used in fuel cells to provide system power sources. Background technique [0002] Please refer to figure 1 As shown, a proton exchange membrane fuel cell 10 (proton exchange membrane fuel cell, hereinafter referred to as PEMFC) is composed of a proton exchange membrane 1 sandwiched between two catalyst layers 2, a diffusion layer 3, a bipolar plate 4 (bipolar plate), a current collector Plate 5 (current collector) and end plate 6 (end plate). The two sides separated by the membrane electrode group belong to the anode (hydrogen or recombined gas) and the ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B1/20H01B1/24C09D5/24C09J9/02H01M4/86H01M8/02H01M8/0226
CPCY02E60/50
Inventor 阎明宇颜贻乙陈发林
Owner IND TECH RES INST
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