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Vanadium redox flow battery electrolyte containing manganese

A vanadium redox flow battery and electrolyte technology, which is applied in the direction of regenerative fuel cells, etc., can solve the problems of unfavorable electrolyte for long-term use, reversibility and poor stability, etc., and achieve the goal of improving battery performance, reducing activation energy, and high-efficiency catalysis Effect

Active Publication Date: 2013-01-16
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, cyclic voltammetry shows that the addition of additives will deteriorate the reversibility and stability of the redox reaction of the electrolyte, which is not conducive to the long-term use of the electrolyte.

Method used

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  • Vanadium redox flow battery electrolyte containing manganese
  • Vanadium redox flow battery electrolyte containing manganese
  • Vanadium redox flow battery electrolyte containing manganese

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] to 60 ml 2M VOSO 4 and 3M H 2 SO 4 Add 0.052 g of manganese dioxide in batches and slowly to the formed solution, stir and dissolve fully to obtain a positive electrode electrolyte, use 60 mL of electrolyte without additives as the negative electrode electrolyte, and use heat-treated polyacrylonitrile for both the positive and negative electrodes. Base graphite felt, combined with proton exchange membrane material, assembled into 80 cm 2 The dynamic all-vanadium redox flow battery obtained battery 1.

[0024] The operation of Experimental Example 1 was repeated, except that no additives were added to the positive and negative electrolytes to obtain a battery 2 .

[0025] The cyclic voltammograms of the blank electrolyte and the additive electrolyte obtained through experiments, such as figure 1 shown. figure 1 2mol / L VOSO is completed at exactly the same concentration as the electrolyte 4 and 3mol / L H 2 SO 4 , Cyclic voltammetry curves before and after manganese...

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Abstract

The invention belongs to the technical field of energy storage liquid flow batteries, and particularly relates to a vanadium redox flow battery electrolyte containing manganese. The vanadium redox flow battery electrolyte containing manganese comprises a manganese compound additive agent, and the manganese compound additive agent is one or multiple of manganous sulfate, manganese dioxide, potassium permanganate and manganese chloride. Dosage of the manganese compound additive agent is 0.001%-5.0% of a capacity concentration of a vanadium substance. By the aid of the manganese compound additive agent, activation energy of redox reaction of positive electrolyte on an electrode surface can be lowered, and efficient catalysis of the electrolyte on the electrode surface is achieved. A preparation method of the vanadium liquid flow battery electrolyte is simple, practicable and low in cost, the electrolyte is high in catalytic activity on the electrode surface, battery performance can be evidently improved, and the vanadium liquid flow battery electrolyte containing manganese is suitable for industrial production and controlling.

Description

technical field [0001] The invention belongs to the technical field of energy storage liquid flow batteries, and in particular relates to a manganese-containing vanadium flow battery electrolyte. Background technique [0002] All vanadium redox flow battery (all vanadium redox battery, referred to as all vanadium redox flow battery) is a device that can be used for large-scale energy storage of new energy. It has the characteristics of deep charge and discharge, long life, easy operation, easy maintenance, With outstanding features such as green and environmental protection, it has been demonstrated in new energy power generation, distributed power stations, and peak-shaving and valley-shaving of urban power grids. [0003] The all-vanadium redox flow battery is different from other energy storage batteries. Its positive and negative electrolytes are sulfuric acid solutions of different valence states of vanadium, and the electrolyte is one of the core parts of the all-vanad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/18
CPCY02E60/528Y02E60/50
Inventor 谢晓峰杨春毛宗强
Owner TSINGHUA UNIV
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