Treatment method of diaphragm of zinc-bromine flow battery, diaphragm and application

A zinc-bromine flow battery and processing method technology, applied in the field of flow batteries, can solve the problems of reduced battery capacity, reduced Coulomb efficiency, large micropores inside the membrane, etc., and achieve the ability to inhibit battery self-discharge and high blocking bromine molecules , quick-acting effect

Active Publication Date: 2021-06-15
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
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  • 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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  • Treatment method of diaphragm of zinc-bromine flow battery, diaphragm and application
  • Treatment method of diaphragm of zinc-bromine flow battery, diaphragm and application
  • Treatment method of diaphragm of zinc-bromine flow battery, diaphragm and application

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Embodiment 1

[0024] The hot-pressed separator was tested using a single cell, and the implementation is as follows.

[0025] Single cell structure: a single cell includes a positive terminal plate, a positive current collector, a positive electrode placed in a positive electrode frame, a battery separator, a negative electrode placed in a negative electrode frame, a negative electrode current collector, and a negative terminal stacked sequentially from bottom to top The negative electrode electrolyte in the negative electrode electrolyte storage tank flows through the negative electrode through the pump, and the positive electrode electrolyte does not flow and is sealed in a closed chamber surrounded by the positive electrode 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 both zinc bromine conventional el...

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Abstract

The invention relates to a treatment method of a diaphragm in a zinc-bromine flow battery, and application of thediaphragm. According to the method, an existing zinc-bromine flow battery diaphragm is subjected to hole shrinkage treatment to achieve the effect of preventing a bromine molecule positive electrode from interacting with a negative electrode, so that the self-discharge of the battery is reduced, and the performance of the battery is improved. The method has the advantages of simple operation, stable process, obvious application effect and the like. When the diaphragm manufactured by the method is used for operating the zinc-bromine flow battery, the coulombic efficiency of the battery can be effectively improved, and the service life of the battery is prolonged.

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 diaphragm of a zinc-bromine flow battery. Background technique [0002] With the depletion of fossil energy, the development and utilization of renewable energy such as wind energy and solar energy has become the focus of attention of all countries. Due to the discontinuity and instability of wind energy and solar energy affected by weather and other factors, this will cause impacts on the grid during the integration of renewable energy generation into the grid, affecting the quality of power supply and the stability of the grid. Energy storage technology can solve this problem and ensure the efficient and stable operation of renewable energy power generation connected to the grid. Energy storage technologies are mainly divided into two categories: physical energy storage and chemical energy storage. Among them, chemical e...

Claims

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Application Information

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Patent Type & Authority Applications(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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