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An all-vanadium redox flow battery electrolyte capacity recovery agent, preparation method and application

An all-vanadium redox flow battery and capacity recovery technology, which is applied in fuel cells, aqueous electrolytes, acidic electrolytes, etc., can solve environmental pollution and other problems, and achieve the effect of reducing the reaction speed

Active Publication Date: 2021-06-15
DALIAN RONGKE ENERGY STORAGE GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to propose an electrolyte capacity recovery agent for an all-vanadium redox flow battery in view of the current problems of electrolyte capacity recovery such as environmental pollution. within a reasonable range for a long time

Method used

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  • An all-vanadium redox flow battery electrolyte capacity recovery agent, preparation method and application
  • An all-vanadium redox flow battery electrolyte capacity recovery agent, preparation method and application
  • An all-vanadium redox flow battery electrolyte capacity recovery agent, preparation method and application

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Embodiment 1

[0025] This embodiment discloses a kind of mixed acid (HCl+H 2 SO 4 ) The capacity recovery agent for the electrolyte solution of the all-vanadium redox flow battery comprises organic molecule spheres with a density lower than that of the electrolyte solution, and the organic molecules are polymerized organic molecules. The particle size of the organic molecular sphere is 8-10mm. The density of the organic molecular sphere is lower than that of the electrolyte, and it floats above the liquid surface of the electrolyte, which will not affect the normal circulation of the electrolyte, and will not block the inlet and outlet pipes of the electrolyte.

[0026] The organic molecular sphere is a double-layer structure, such as figure 1 As shown, the outer layer 1 is sodium alginate, and the inner layer 2 is embedded solid oxalic acid. The dosage ratio of the outer layer to the inner layer is 7:3 (mass ratio). The organic molecular sphere of the present invention adopts a double-...

Embodiment 2

[0032] This embodiment discloses an electrolyte capacity recovery agent for an all-vanadium redox flow battery, which includes organic molecule spheres with a density lower than that of the electrolyte, and the organic molecules are polymerized organic molecules. The particle diameter of the organic molecule sphere is 1-10mm. The density of the organic molecular sphere is lower than that of the electrolyte, and it floats above the liquid surface of the electrolyte, which will not affect the normal circulation of the electrolyte, and will not block the inlet and outlet pipes of the electrolyte. The organic molecular sphere has a double-layer structure, the outer layer is methyl cellulose, and the inner layer is embedded glycerin. The dosage ratio of the outer layer to the inner layer is 7:3. The organic molecular sphere of the present invention adopts a double-layer knot structure, the outer layer is methyl cellulose with a slower reaction speed, and the inner layer is glyceri...

Embodiment 3

[0038]This embodiment discloses a hydrochloric acid (HCl) all-vanadium redox flow battery electrolyte capacity recovery agent, which includes organic molecule spheres with a density lower than that of the electrolyte, and the organic molecules are polymerized organic molecules. The particle size of the organic molecular sphere is 8-10mm. The density of the organic molecular sphere is lower than that of the electrolyte, and it floats above the liquid surface of the electrolyte, which will not affect the normal circulation of the electrolyte, and will not block the inlet and outlet pipes of the electrolyte.

[0039] The organic molecular sphere is a double-layer structure, such as figure 1 As shown, the outer layer 1 is deacetylated chitin, and the inner layer 2 is embedded solid ascorbic acid. The dosage ratio of the outer layer to the inner layer is 7:3 (mass ratio). The organic molecular sphere of the present invention adopts a double-layer junction structure, the outer lay...

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Abstract

The invention provides an electrolyte capacity recovery agent for an all-vanadium redox flow battery, a preparation method and an application thereof. The electrolyte capacity recovery agent for an all-vanadium redox flow battery includes organic molecule spheres with a density lower than that of the electrolyte, and the organic molecules are weakly reducing polymerized organic molecules. The weakly reducible polymeric organic molecules are one or more mixtures of cellulose, chitin, and alginate. The density of the organic molecular sphere is lower than that of the electrolyte, and it floats above the liquid surface of the electrolyte, which will not affect the normal circulation of the electrolyte, and will not block the inlet and outlet pipes of the electrolyte. The formula of the all-vanadium redox flow battery electrolyte capacity recovery agent of the invention is scientific and reasonable, and the recovery agent can maintain the discharge capacity of the battery electrolyte within a reasonable range for a long time.

Description

technical field [0001] The invention relates to liquid flow battery technology, in particular to an electrolyte capacity recovery agent for an all-vanadium redox flow battery, a preparation method and an application. Background technique [0002] The vanadium battery energy storage system has unique advantages in the field of liquid flow energy storage, and has many successful examples in recent years, especially the successful research and development of the hybrid acid vanadium battery system since 2012, which has greatly increased the energy density of vanadium batteries. improvement. It further expands its living space in the increasingly competitive field of energy storage technology. [0003] As one of the important core components of the vanadium redox flow battery, the average valence state of the electrolyte is gradually out of balance after a long period of charge and discharge operation, and the initial valence of 3.5 gradually increases, resulting in a continuou...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/18
CPCH01M8/188H01M2300/0011Y02E60/50
Inventor 高新亮姜雪莲林永坤李宗麟邹振龙
Owner DALIAN RONGKE ENERGY STORAGE GRP CO LTD