Bipolar plate for all-vanadium redox flow battery based on butadiene styrene rubber and preparation method of bipolar plate

An all-vanadium redox flow battery, styrene-butadiene rubber technology, applied in fuel cells, regenerative fuel cells, circuits, etc., can solve the problems of poor mechanical properties of materials, high graphite filling amount, etc., to achieve good flexibility, uniform dispersion, favorable for The effect of overall cost control

Pending Publication Date: 2022-01-11
CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in order to improve the conductivity of bipolar plates, higher graphite fillings are often required, which will lead to poor overall mechanical properties of the material.

Method used

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  • Bipolar plate for all-vanadium redox flow battery based on butadiene styrene rubber and preparation method of bipolar plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 70 parts of expanded graphite and 2 parts of sulfur were mixed for 10 minutes by a high-speed mixer, and then mixed with 30 parts of styrene-butadiene rubber raw rubber at 70°C until uniform. The rubber compound after being milled was taken into a mold, and was molded by hot pressing at a temperature of 150° C. and a pressure of 20 MPa for 30 minutes to obtain a bipolar plate.

[0022] The bipolar plate had a resistivity of 12 mΩ·cm, a bending strength of 23 MPa, and an elongation at break of 34%.

Embodiment 2

[0024] Take 60 parts of expanded graphite and 3 parts of sulfur to mix for 10 minutes through a high-speed mixer, and then knead with 40 parts of styrene-butadiene rubber raw rubber at 65°C until uniform. The rubber compound after being milled was taken into a mold, and hot-pressed for 25 minutes at a temperature of 160° C. and a pressure of 15 MPa to obtain a bipolar plate.

[0025] The bipolar plate had a resistivity of 41 mΩ·cm, a bending strength of 26 MPa, and an elongation at break of 51%.

Embodiment 3

[0027] 50 parts of expanded graphite and 5 parts of sulfur were mixed for 10 minutes by a high-speed mixer, and then mixed with 50 parts of styrene-butadiene rubber raw rubber at 60°C until uniform. The rubber compound after being milled was taken into a mold, and hot-pressed for 15 minutes at a temperature of 170° C. and a pressure of 10 MPa to obtain a bipolar plate.

[0028] The bipolar plate had a resistivity of 103 mΩ·cm and a bending strength of 31 MPa.

[0029] figure 1 The tensile curve of the sample prepared in Example 3 reflects the relationship between the strain of the sample and the stress, and it can be found that the elongation at break is 76%.

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Abstract

The invention belongs to the technical field of bipolar plates for all-vanadium redox flow batteries, and particularly relates to a bipolar plate for an all-vanadium redox flow battery based on butadiene styrene rubber and a preparation method of the bipolar plate . The bipolar plate is obtained by uniformly mixing 50-70 parts of expanded graphite and 2-5 parts of sulfur, uniformly plastifying with 30-50 parts of butadiene styrene rubber, and performing hot-pressing vulcanization. According to the prepared bipolar plate, the resistivity is 12-103 m omega.cm, the bending strength is 23-31 MPa, and the elongation at break is 34-76%.

Description

technical field [0001] The invention belongs to the technical field of bipolar plates for all-vanadium redox flow batteries, and particularly relates to a bipolar plate for all-vanadium redox flow batteries based on styrene-butadiene rubber and a preparation method thereof. Background technique [0002] With the rapid development of global renewable green energy, wind power and photovoltaic power generation have become key development directions. However, wind power, photovoltaic power generation and other power generation methods are greatly affected by the external environment, and their power output is unstable, which is likely to cause fluctuations in the power grid and increase operating costs. Therefore, part of the power generation has become "garbage electricity" or even "abandoned electricity". In order to promote and use new energy and complete the "dual carbon" goal, energy storage has become a good technical measure. Energy storage refers to the technology of s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/0243H01M8/0234H01M8/18
CPCH01M8/0243H01M8/0234H01M8/188Y02E60/50
Inventor 李德福丁治天韩慧果辛亚男
Owner CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
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