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Composite bipolar plate for fuel cell and its preparation method and application

A bipolar plate, polymer technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of reduced bipolar plate cost, complex preparation process, low production efficiency, etc., to improve full battery performance and simple equipment requirements. , the effect of low cost

Active Publication Date: 2021-01-15
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, the bipolar plate prepared by this process requires a curing time of up to 1 day, and the production efficiency is low, which is not conducive to the reduction of the cost of the bipolar plate
Daniel Adams et al. (Energy Fuels2017, 31, 14320-14331) used the method of adding a carbon felt intermediate transition layer to prepare a composite bipolar plate with a "sandwich" structure. The composite plate has high bending strength and conductivity, but the preparation process is relatively complicated and the preparation cost is high

Method used

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  • Composite bipolar plate for fuel cell and its preparation method and application
  • Composite bipolar plate for fuel cell and its preparation method and application
  • Composite bipolar plate for fuel cell and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Take by weighing ABS resin (molecular weight is 500,000) 0.8kg, PVDF resin (molecular weight is 500,000) 0.8kg, graphite powder 8kg, carbon fiber 0.2kg, join in the kneader, kneading temperature is room temperature, kneading speed is 30r / min, kneading time 10min. Then the uniformly mixed material was transferred to a mold with a flow field, the pre-compression pressure was 40Mpa, the molding temperature was 160°C, the molding pressure was 80MPa, and the molding time was 5min. Finally, the cooling method of circulating water was used to lower the mold temperature to room temperature, and the carbon / polymer composite bipolar plate was obtained by releasing the pressure and demoulding.

Embodiment 2

[0037]Weigh ABS resin (molecular weight is 2 million) 0.6kg, PVDF resin (molecular weight is 1.5 million) 0.8kg, PP resin (molecular weight is 35,000) 0.1kg, graphite powder 8.5kg, carbon fiber 0.3kg respectively, add to kneading In the machine, the kneading temperature is room temperature, the kneading speed is 45r / min, and the kneading time is 15min. Then the uniformly mixed material was transferred to a mold with a flow field, the pre-compression pressure was 60MPa, the molding temperature was 180°C, the molding pressure was 100MPa, and the molding time was 15min. Finally, the temperature of the mold is lowered to room temperature by circulating water cooling, and the carbon / polymer composite bipolar plate is obtained by releasing the pressure and demoulding.

Embodiment 3

[0039] Weigh respectively ABS resin (molecular weight: 1 million) 0.4kg, PVDF resin (molecular weight: 2 million) 0.6kg, PP resin (molecular weight: 120,000) 0.3kg, graphite powder 9.0kg, carbon fiber 0.4kg, Add it into a kneader, the kneading temperature is room temperature, the kneading speed is 50r / min, and the kneading time is 30min. Then the uniformly mixed material was transferred to a mold with a flow field, the pre-compression pressure was 80MPa, the molding temperature was 200°C, the molding pressure was 120MPa, and the molding time was 25min. Finally, the cooling method of circulating water is used to lower the mold temperature to room temperature, and the carbon / polymer composite bipolar plate is obtained by releasing the pressure and demoulding;

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Abstract

The invention belongs to the field of fuel cells, and discloses a preparation method of a carbon / polymer composite bipolar board. The bipolar board is a carbon / polymer composite board composed of acrylonitrile butadiene styrene resin, polyvinylidene fluoride resin, polypropylene, a conductive filler, and a fiber reinforced material. The composite bipolar board has good machinability, excellent electrical conductivity and durability. The bipolar board exhibits comparable performances to traditional commercial graphite sheets in full battery testing.

Description

technical field [0001] The invention belongs to the technical field of fuel cells, and in particular relates to a carbon / polymer-based composite bipolar plate and its preparation method and application. Background technique [0002] A fuel cell (FC) is an energy conversion device that can directly convert chemical energy into electrical energy. It has the advantages of high energy conversion efficiency (40-60%), environmental friendliness, fast start-up speed, long working life, etc., so it has received more and more attention, especially in automotive power, mobile power and fixed It has broad application prospects in power stations and other aspects. However, the high cost of fuel cells greatly restricts its commercial application, and the cost of bipolar plates accounts for 30%-45% of the cost of fuel cell stacks. [0003] The current commercialized bipolar plates are mainly non-porous graphite plates and modified metal plates. The non-porous graphite plates are obtaine...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/86H01M4/88
CPCH01M4/8652H01M4/8875H01M4/8882H01M2004/8694Y02E60/50
Inventor 邵志刚吕波何良苟勇
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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