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Composite bipolar board for fuel cell and preparation method and application of composite bipolar board

A bipolar plate and conductive filler 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., and achieve good product quality, simple equipment requirements, low cost effect

Active Publication Date: 2019-03-29
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) adopted the method of adding a carbon felt intermediate transition layer to prepare a composite bipolar plate with a "sandwich" structure, which has high flexural strength and conductivity, but the preparation process is relatively complicated and the preparation cost is high

Method used

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  • Composite bipolar board for fuel cell and preparation method and application of composite bipolar board
  • Composite bipolar board for fuel cell and preparation method and application of composite bipolar board
  • Composite bipolar board for fuel cell and preparation method and application of composite bipolar board

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Effect test

Embodiment 1

[0028] Take by weighing respectively PMMA resin (molecular weight is 85,000) 0.8kg, PS resin (molecular weight is 200,000) 0.6kg, SEBS resin (styrene content 15%, melt index is 5g / 10min under 200 ℃) 0.2kg, graphite powder ( Purity 99.95%, 400 mesh) 9.4kg, carbon fiber (diameter is 5 μm, aspect ratio is 20) 0.4kg, join in the ball mill, ball mill temperature is room temperature, ball mill speed is 30r / min, ball mill time 10min. Then transfer the homogeneously mixed material to a mold with a flow field, the pre-compression pressure is 40MPa, The molding time is 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 2

[0030] Take by weighing respectively PMMA resin (molecular weight is 100,000) 0.6kg, PS resin (molecular weight is 200,000) 0.8kg, SEBS resin (styrene content 10%, melt index is 9g / 10min under 200 ℃) 0.2kg, graphite powder ( Purity 99.95%, 400 mesh) 9.6kg, carbon fiber (diameter is 5 μ m, aspect ratio is 20) 0.4kg, join in the ball mill, ball mill temperature is room temperature, ball mill speed is 50r / min, ball mill time 8min. Then transfer the homogeneously mixed material to a mold with a flow field, the pre-compression pressure is 80MPa, The molding time is 20min. 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.

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Abstract

The invention belongs to the field of fuel cells, and discloses a preparation method of a composite bipolar board. The bipolar board is a carbon-plastic composite board which is composed of polymethylmethacrylate resin, polystyrene resin, a hydrogenated ethylene- butylene-styrene triblock copolymer, a conductive filler and a fiber reinforced material. The composite bipolar board has the advantages of good machining performances, excellent conductivity and excellent durability. The body resistance and the contact resistance of the bipolar board can be reduced on the premise of ensuring the assembly of an electric pile, and the performance of the whole battery is improved.

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, and it is currently very promising to be used in portable power supplies, electric vehicles, etc. , unmanned aerial vehicle, underwater submersible, etc. power supply. Currently, the main goals of PEMFC research are to reduce system cost and improve battery performance and stability. 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. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/86H01M4/88
CPCH01M4/8652H01M4/8875H01M4/8882H01M2004/8694Y02E60/50
Inventor 邵志刚吕波何良覃博文苟勇高正远
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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