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Preparation method of vanadium battery negative electrode solution

A technology for anolyte and vanadium battery, applied in the field of preparation of vanadium battery anolyte, can solve problems such as improving and affecting the energy efficiency of vanadium battery, and achieve the effects of reducing viscosity, improving energy efficiency, and reducing electrochemical polarization

Inactive Publication Date: 2013-07-10
朴宁
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AI Technical Summary

Problems solved by technology

[0003] The technical problem mainly solved by the present invention is that the existing negative electrode liquid affects the energy efficiency improvement of the vanadium battery

Method used

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Embodiment Construction

[0015] The technical solutions in the embodiments of the present invention will be described clearly and completely below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0016] The embodiment of the invention discloses a preparation method of a vanadium battery anode solution, including:

[0017] (1) Mix vanadium pentoxide, oxalic acid and sulfuric acid in proportion;

[0018] (2) Add sulfuric acid to the mixture in step (1), heat to completely dissolve the vanadium pentoxide, and boil for 45-60 minutes to obtain a vanadyl sulfate solution;

[0019] (3) The excess oxalic acid in the vanadyl sulfate solution is electrified, and a mixture of trivalent vanadium ions and divalent vanadium ions is obta...

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Abstract

The invention provides a preparation method of a vanadium battery negative electrode solution. The preparation method comprises the following steps of: (1) mixing vanadic oxide, oxalic acid and sulfuric acid in a ratio; (2) adding sulfuric acid to the mixture obtained in the step (1), heating so that the vanadic oxide is fully dissolved, and boiling for 45-60 minutes, to obtain a vanadyl sulfate solution; (3) electrifying the vanadyl sulfate solution to remove excessive oxalic acid and obtain a mixture of trivalent vanadium ions and bivalent vanadium ions; (4) adding an appropriate amount of bivalent vanadium oxide electrolyte to the mixture obtained in the step (3) to remove the bivalent vanadium ions and obtain the vanadium battery negative electrode solution; and (5) adding toluene sulfonic acid to the vanadium battery negative electrode solution as the catalyst. The preparation method has the advantages that through adding the toluene sulfonic acid to the vanadium battery negative electrode solution as the catalyst, the reversibility of the electrode process is improved, the electrochemical polarization is reduced, the vanadium battery energy efficiency is increased, and the viscosity of the negative electrode solution is reduced.

Description

Technical field [0001] The invention relates to a preparation method, in particular to a preparation method of a vanadium battery anode solution which can improve the energy efficiency of the vanadium battery. Background technique [0002] Vanadium batteries have many advantages. Its energy depends on the electrolyte. By increasing the amount of electrolyte, the battery capacity can be increased. By replacing the electrolyte, the effect of instant charging can be achieved. Therefore, the electrolyte plays a very important role in the research of vanadium batteries. Among them, the existing anode solution does not make a satisfactory contribution to improving the energy efficiency of vanadium batteries. Summary of the invention [0003] The main technical problem solved by the present invention is that the existing anode liquid affects the energy efficiency improvement of the vanadium battery. [0004] In order to solve the above technical problems, an embodiment of the present inve...

Claims

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Application Information

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IPC IPC(8): H01M8/18
CPCY02E60/50
Inventor 胡国良
Owner 朴宁
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