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All-vanadium redox flow battery electrolyte formula and process for maintaining high performance of electrolyte

A technology of all-vanadium redox flow battery and electrolyte, which is applied in the field of electrolyte formula and technology of all-vanadium redox flow battery, and can solve the problems that have not yet been qualitatively and quantitatively

Active Publication Date: 2020-05-26
DALIAN RONGKE POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

From a practical point of view, what is the upper limit of the allowable concentration of organic C in the electrolyte has not yet been related to application reports and qualitative and quantitative explanations;

Method used

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  • All-vanadium redox flow battery electrolyte formula and process for maintaining high performance of electrolyte
  • All-vanadium redox flow battery electrolyte formula and process for maintaining high performance of electrolyte
  • All-vanadium redox flow battery electrolyte formula and process for maintaining high performance of electrolyte

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] The electrolyte solution was prepared and operated according to the content of the experimental sample and the control sample in the following table, and the results obtained are shown in the following table:

[0071]

[0072]

[0073] The above data and operation results show that after properly amplifying the concentration of the above six types of organic C elements, this experiment uses H 2 SO 4 The system electrolyte, 2kW battery, has experienced more than 170 cycles. Compared with the control sample, the system efficiency of the high-purity vanadium electrolyte battery has no significant change, indicating that the organic C element is properly released, and has no effect on the system discharge capacity and efficiency.

Embodiment 2

[0075] The electrolyte solution was prepared and operated according to the content of the experimental sample and the control sample in the following table:

[0076]

[0077]

[0078] The running results are shown in the table below:

[0079]

[0080] The above data and operation results show that the experimental sample H after appropriately amplifying the concentration of the above six types of organic C elements 2 SO 4 System electrolyte, compared with the control electrolyte with a large residual organic C element, using a 10kW battery, after more than 170 cycles, the system efficiency of the experimental electrolyte is better than that of the control electrolyte, and the system discharge capacity decays significantly in the experimental electrolyte better than the control electrolyte.

[0081] Depend on Figure 2-3 It can be seen from the middle curve that the voltage efficiency of the experimental sample electrolyte is 4 percentage points higher than that of ...

Embodiment 3

[0083] The electrolyte solution was prepared and operated according to the content of the experimental sample and the control sample in the following table:

[0084]

[0085]

[0086] The running results are shown in the table below:

[0087]

[0088] The above data and operation results show that the experimental sample H after appropriately amplifying the concentration of the above six types of organic C elements 2 SO 4 System electrolyte, compared with the control electrolyte with a large residual organic C element, using a 30kW battery, after more than 170 cycles, the efficiency of the experimental electrolyte system is significantly better than that of the control electrolyte system, and the system discharge capacity decay experiment The electrolyte was significantly better than the control electrolyte.

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Abstract

The invention belongs to the field of all-vanadium redox flow battery electrolytes for maintaining high performance of the electrolytes, and discloses an all-vanadium redox flow battery electrolyte formula and process for maintaining high performance of an electrolyte. The raw material vanadium and the content of a C element in the electrolyte production process are limited, and the content of theC element after the organic C element-containing vanadium raw material is completely dissolved to form the electrolyte is limited. The contents of the organic C element of the positive and negative electrodes are respectively limited. According to the invention, the content of the organic C element in the system electrolyte is properly released and controlled, so that the cost of the electrolyteproduction process is reduced, the problems of over-high system maintenance frequency, high maintenance cost and the like caused by over-high content of the C element are solved, the content of the Celement in the electrolyte can be effectively controlled, the system efficiency is maintained, and the electrolyte cost is greatly reduced.

Description

technical field [0001] The invention belongs to the field of an all-vanadium redox flow battery electrolyte for maintaining the high performance of the electrolyte, and in particular relates to a formula and a process for an all-vanadium redox flow battery electrolyte for maintaining the high performance of the electrolyte. Background technique [0002] In the existing all-vanadium redox flow battery electrolyte quality standards, there are strict requirements on the C element (organic carbon, unless otherwise specified, the C element refers to the organic C element) in the electrolyte, that is, except for the main element metal vanadium (V) In addition, the C element content should be as zero as possible, so that the raw material vanadium must ensure high purity (>98%). At the same time, the step of calcination to remove C is added in the electrolyte processing process, which eventually leads to an increase in the cost of the finished electrolyte. [0003] In addition, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/18
CPCH01M8/188Y02E60/50
Inventor 高新亮邹毅张涛王晓丽赵叶龙王良宋玉波王丹张华民
Owner DALIAN RONGKE POWER
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