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Composite snakelike flow channel structure, and all-vanadium redox flow battery containing same

An all-vanadium flow battery and flow channel technology, applied in fuel cells, regenerative fuel cells, circuits, etc., can solve problems such as uneven distribution

Active Publication Date: 2021-05-07
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problem of uneven distribution of electrolyte in porous electrodes, the present invention provides a composite serpentine flow channel structure and an all-vanadium redox flow battery containing it. Composite serpentine flow channel and reserved space for electrode compression make electrolyte concentration distribution more uniform, reduce overpotential and improve battery performance

Method used

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  • Composite snakelike flow channel structure, and all-vanadium redox flow battery containing same
  • Composite snakelike flow channel structure, and all-vanadium redox flow battery containing same
  • Composite snakelike flow channel structure, and all-vanadium redox flow battery containing same

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Embodiment 1

[0035] The thickness of the bipolar plate 9 is 4mm, the composite serpentine flow channel is engraved on the bipolar plate 9, the height of the main channel 1 is 2mm, the width is 1.5mm, the length of the first section and the tail section are both 9.75mm; the serpentine flow channel 2 The height is 1.8mm, the width is 1.5mm, and the length is 84.75mm; the distance between the two serpentine flow channels 2 is 0.75mm; the height of the reserved compression electrode space 3 is 0.2mm and the width is 1.5mm, that is, reserved The space height accounts for 10% of the height of the composite serpentine runner.

Embodiment 2

[0037] The thickness of the bipolar plate 9 is 4mm, the composite serpentine flow channel is engraved on the bipolar plate 9, the height of the main channel 1 is 2mm, the width is 1.5mm, the length of the first section and the tail section are both 9.75mm; the serpentine flow channel 2 The height is 1.5mm, the width is 1.5mm, and the length is 84.75mm; the distance between the two serpentine flow channels 2 is 0.75mm; the height of the reserved compression electrode space 3 is 0.5mm and the width is 1.5mm, that is, reserved The space height accounts for 25% of the height of the composite serpentine runner.

Embodiment 3

[0039] The thickness of the bipolar plate 9 is 4mm, the composite serpentine flow channel is engraved on the bipolar plate 9, the height of the main channel 1 is 2mm, the width is 1.5mm, the length of the first section and the tail section are both 9.75mm; the serpentine flow channel 2 The height is 1.3mm, the width is 1.5mm, and the length is 84.75mm; the distance between the two serpentine flow channels 2 is 0.75mm; the height of the reserved compression electrode space is 0.7mm, and the width is 1.5mm, that is, the height of the reserved space 35% of the height of the composite serpentine runner.

[0040] Based on the above-mentioned composite serpentine flow channel, the present invention also proposes an all-vanadium redox flow battery, comprising a bipolar plate 9, a negative electrode 4, a proton exchange membrane 6, and a positive electrode 5, and the above-mentioned composite serpentine flow channel is etched on the bipolar plate 9 structure.

[0041] The installatio...

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Abstract

The invention relates to a composite snakelike flow channel structure, and an all-vanadium redox flow battery containing same. The composite snakelike flow channel structure comprises a main flow channel etched on a bipolar plate, the head section of the main flow channel is split into N snakelike flow channels, the tail section of the main flow channel is converged by the N snakelike flow channels, N is a natural number greater than 2, and the snakelike flow channels are equal in width and are uniformly distributed; and a reserved compression electrode space is arranged at the bottom of each snake-shaped flow channel. According to the invention, the space for compressing the reserved electrode is designed, and the electrolyte is guided to flow into the space for compressing the electrode through the composite snakelike flow channel and then flow into the porous electrode, so that the electrolyte is distributed more uniformly, the overpotential is reduced, and the performance of the battery is improved.

Description

technical field [0001] The invention belongs to the technical field of all-vanadium redox flow batteries, in particular to a composite serpentine flow channel structure and an all-vanadium redox flow battery containing the same. Background technique [0002] With the rapid economic development, the sharp increase in energy demand has become the main problem facing human beings. Traditional energy sources, such as coal mines, are exhausted due to excessive consumption, which cannot be exploited indefinitely, and will also have irreversible impacts on the environment. Green energy (hydropower, wind power and solar power, etc.) can effectively alleviate the above difficulties. At the same time, how to store green energy on a large scale has become a hot research topic. Among them, all-vanadium redox flow batteries have attracted extensive attention due to their long cycle life, reliable and safe operation, flexible design, and high energy efficiency. [0003] A typical all-va...

Claims

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Application Information

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IPC IPC(8): H01M8/0263H01M8/18
CPCH01M8/0263H01M8/188Y02E60/50
Inventor 熊斌宇丁宇明李旸张清勇唐金锐张华军
Owner WUHAN UNIV OF TECH
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