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A recovery method for the performance of zinc-bromine single flow battery

A liquid flow battery and recovery method technology, applied in the direction of fuel cells, regenerative fuel cells, fuel cell additives, etc., can solve problems such as short circuit failure, battery performance attenuation, dendrite batteries, etc., to solve efficiency attenuation and improve service life Effect

Active Publication Date: 2022-02-22
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Zinc-bromine flow batteries have the problem of accumulation of zinc in the negative electrode during the charging and discharging process, and the accumulation of zinc will increase the polarization of the battery, resulting in attenuation of battery performance and affecting the service life of the battery. short circuit failure

Method used

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  • A recovery method for the performance of zinc-bromine single flow battery
  • A recovery method for the performance of zinc-bromine single flow battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] 2MZnBr 2 +3MKCl+0.4MMEP is used as the electrolyte to carry out the cycle performance experiment of zinc-bromine flow battery, the electrode is carbon felt, the electrolyte flow rate is 60ml / min, and the current density is 40mA / cm 2 . Electrolyte intermixing occurs when battery energy efficiency decays. The experimental results show that the battery runs for 220 cycles, and the energy efficiency of the battery decreases by 8%. The positive and negative electrolytes are mixed together until the open circuit voltage of the battery is 0V, and the battery continues to charge and discharge, and the battery performance returns to the initial level.

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Abstract

The invention relates to a method for recovering the performance of a zinc-bromine single flow battery. The positive electrode chamber of the battery is filled with positive electrode electrolyte, and the negative electrode electrolyte stored in the negative electrode storage tank is passed between the negative electrode storage tank and the negative electrode chamber of the battery through a pipeline. Circulating flow, after the battery has been running for a period of time, the positive electrode electrolyte in the positive electrode chamber is introduced into the negative electrode storage tank to mix with the negative electrode electrolyte, and then part of the mixed solution is filled into the positive electrode chamber again, and the positive and negative electrode electrolytes are mixed to make Battery performance restored. The invention proposes a battery performance recovery method when the performance of the zinc-bromine flow battery decays, which solves the problem of efficiency decay during the operation of the zinc-bromine flow battery and improves the service life of the battery.

Description

technical field [0001] The invention relates to the application of a battery performance recovery method in a zinc-bromine liquid flow battery. Background technique [0002] Renewable energy such as wind energy and solar energy has the characteristics of discontinuity and instability, which will cause impact on the grid during the grid connection process and affect the safe and stable operation of the grid. Energy storage technology can ensure the efficient and stable operation of renewable energy power generation grid connection. Energy storage technologies are mainly divided into two categories: physical energy storage and chemical energy storage. Redox flow batteries suitable for large-scale and high-capacity energy storage in chemical energy storage have attracted extensive attention due to their advantages such as independent battery power and capacity, fast response, simple structure, and easy design. Zinc-bromine flow battery is a kind of redox flow battery. In addi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/04H01M8/04186H01M8/18
CPCY02E60/50
Inventor 许鹏程李先锋张华民赖勤志苑辰光刘新运郑建伟
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI