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An all-vanadium redox flow battery electrolyte formula and process for maintaining the high performance of the electrolyte

An all-vanadium redox flow battery and electrolyte technology, applied in the field of all-vanadium redox flow battery electrolyte formulation and process, can solve problems such as qualitative and quantitative problems that have not yet been solved, and achieve high maintenance costs, cost reduction, and system maintenance. The effect of excessive frequency

Active Publication Date: 2021-10-26
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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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 an all-vanadium redox flow battery electrolyte for maintaining the high performance of the electrolyte, and discloses a formula and a process for an all-vanadium redox flow battery electrolyte for maintaining the high performance of the electrolyte. Limit the C element content in the raw material vanadium and electrolyte production process, and limit the C element content after the organic C element vanadium raw material is completely dissolved to form an electrolyte. The contents of organic C elements in the positive and negative electrodes are respectively limited. The present invention properly releases and controls the organic C element content in the system electrolyte, reduces the cost of the electrolyte production process, solves the problems of high system maintenance frequency and high maintenance cost caused by excessive C element content, and can effectively control electrolysis. The content of C element in the liquid can maintain the system efficiency and greatly reduce the cost of the electrolyte.

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 Patents(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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