A treatment method, film and application of zinc-bromine flow battery diaphragm

A zinc-bromine flow battery and diaphragm technology, which is applied in applications, fuel cells, regenerative fuel cells, etc., can solve the problems of reduced battery capacity, large micropores inside the membrane, and reduced Coulombic efficiency, etc., to achieve the suppression of battery self-discharge, high The ability to block bromine molecules and solve the effect of self-discharge

Active Publication Date: 2022-06-07
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

During the charging process of the battery and during the storage process after charging, the bromine molecules generated in the positive electrode will diffuse to the negative electrode through the micropores of the separator, and then undergo a redox reaction with the zinc element generated by the negative electrode, resulting in a decrease in battery capacity and coulombic efficiency.
[0004] The existing commercial PE porous membrane has too large internal micropores. Even the most mature PE porous membrane produced by the most mature manufacturing process has a micropore diameter of more than 0.1um. Aperture is still too large

Method used

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  • A treatment method, film and application of zinc-bromine flow battery diaphragm
  • A treatment method, film and application of zinc-bromine flow battery diaphragm
  • A treatment method, film and application of zinc-bromine flow battery diaphragm

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Embodiment 1

[0024] The separator after hot pressing was tested using a single cell, and the embodiment is as follows.

[0025] Single cell structure: The single cell includes the positive electrode plate, the positive electrode current collector, the positive electrode placed in the positive electrode frame, the battery separator, the negative electrode placed in the negative electrode frame, the negative electrode current collector, and the negative electrode. Plate, the negative electrolyte in the negative electrolyte storage tank flows through the negative electrode through the pump, and the positive electrolyte does not flow and is sealed in a closed chamber surrounded by the positive current collector, the positive electrode frame, the positive electrode, and the battery diaphragm; Extremely carbon felt; the negative electrode is also a deposited carbon felt electrode, and the positive and negative electrolytes are conventional zinc-bromine electrolytes. The negative electrode is enc...

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PUM

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Abstract

The invention relates to a treatment method and application of a diaphragm in a zinc-bromine flow battery. The method is to perform shrinkage treatment on the diaphragm of the existing zinc-bromine flow battery to prevent bromine molecules from connecting positive electrodes to negative electrodes, thereby reducing Battery self-discharge, improve battery performance. The method has the advantages of simple operation, stable process, obvious application effect and the like. Using the diaphragm manufactured by the method of the invention to run the zinc-bromine flow battery can effectively improve the Coulomb efficiency of the battery and improve the battery life.

Description

technical field [0001] The invention belongs to the field of liquid flow batteries, and in particular relates to a treatment method and application of a zinc-bromine liquid flow battery diaphragm. Background technique [0002] With the increasing depletion of fossil energy, the development and utilization of renewable energy such as wind energy and solar energy have become the focus of attention of all countries. Due to the discontinuity and instability of wind energy and solar energy due to the influence of weather and other factors, this will cause an impact on the power grid during the grid connection of renewable energy power generation, affecting the quality of power supply and the stability of the power grid. Energy storage technology can solve this problem and ensure the efficient and stable operation of renewable energy power generation and grid connection. Energy storage technology is mainly divided into two categories: physical energy storage and chemical energy s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/0239H01M8/18B29C51/46
CPCH01M8/0239H01M8/188B29C51/46B29K2023/06B29L2007/00Y02E60/50
Inventor 李先锋宋杨张华民
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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