All-vanadium redox flow battery electrolytic solution preparation method

A liquid flow battery and electrolyte technology, which is applied to fuel cell components, fuel cells, secondary batteries, etc., can solve the problems of long electrolysis time, environmental pollution, and affecting the efficiency of electrolyte preparation, and achieve the goal of reducing SO2 Emissions, improve work efficiency, and be beneficial to the effect of large-scale production

Inactive Publication Date: 2008-06-04
PANZHIHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the first method takes a long time for electrolysis, which affects the preparation efficiency of the electrolyte.
In addition, in the previous two methods SO

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Reagents used:

[0018] V 2 o 3 : metallurgical grade

[0019] h 2 SO 4 : Analytical pure, d=1.84

[0020] Stir 11.5g of vanadium trioxide and 17g of concentrated sulfuric acid with a specific gravity of 1.84 evenly and put them into a furnace for calcination at a temperature range of 100-300°C for 0.5-5 hours to obtain a green calcined product. Dissolve the product in 2mol / l sulfuric acid solution to obtain a solution of 4-valent vanadium and 3-valent vanadium ions. The concentration of vanadium ions in the electrolyte was analyzed by potentiometric titration, the concentration of 4-valent vanadium ions: the concentration of 3-valent vanadium ions ≈1. The electrolyte was left for more than 100 days and no crystalline vanadium was found.

Embodiment 2

[0022] Reagents used:

[0023] V 2 o 3 : metallurgical grade

[0024] h 2 SO 4 : Analytical pure, d=1.84

[0025] Stir 13g of vanadium trioxide and 30g of concentrated sulfuric acid with a specific gravity of 1.84 evenly and put them into a furnace for calcination at a temperature range of 120-230°C for 0.5--5 hours to obtain a green calcined product. Dissolve the product in 2mol / l sulfuric acid solution to obtain a solution of 4-valent vanadium and 3-valent vanadium ions. The concentration of vanadium ions in the electrolyte was analyzed by potentiometric titration, the concentration of 4-valent vanadium ions: the concentration of 3-valent vanadium ions ≈1. The electrolyte was left for more than 100 days and no crystalline vanadium was found.

Embodiment 3

[0027] Reagents used:

[0028] V 2 o 3 : metallurgical grade

[0029] h 2 SO 4 : Analytical pure, d=1.84

[0030] Stir 4g of vanadium trioxide and 8g of concentrated sulfuric acid with a specific gravity of 1.84 evenly, put them into a furnace for calcination at a temperature range of 130-240°C for 0.5--5 hours, and obtain a green calcined product. Dissolve the product in 2mol / l sulfuric acid solution to obtain a solution of 4-valent vanadium and 3-valent vanadium ions. The concentration of vanadium ions in the electrolyte was analyzed by potentiometric titration, the concentration of 4-valent vanadium ions: the concentration of 3-valent vanadium ions ≈1. The electrolyte was left for more than 100 days and no crystalline vanadium was found.

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Abstract

The invention relates to a method for preparing electrolyte for a flow battery with full vanadium oxidation reduction, which is characterized by the processes: mixing the three oxidation vanadium and the sulphuric acid with a specified volume of proportion of 1. 84, then calcining the mixture under 100 DEG C to 300DEG C in a pipe type electric stove to get vanadium compound in green color, at last dissolving the calcined product into the dilute sulfuric acid to get the vanadium electrolyte used in a vanadium battery in which 4 valence vanadium and 3 valence vanadium take 50 per cent of the total vanadium quantity. The electrolyte for a flow battery with whole vanadium oxidation reduction prepared by the method reduces the emission of SO2, simplifies the preparation work procedure and is beneficial for scale production and environment protection of the flow battery with full vanadium oxidation reduction.

Description

technical field [0001] The invention relates to a liquid flow battery-an all-vanadium redox flow battery, in particular to a method for preparing an electrolyte for an all-vanadium redox flow battery. Background technique [0002] Due to the energy crisis and environmental pressure, traditional energy is being converted to renewable energy. With the application of energy sources such as wind energy and solar energy, it is necessary to research and develop cheap and efficient energy storage systems. Among many energy storage systems, redox flow batteries have been developed rapidly in recent years due to their unique advantages. Among them, the vanadium redox flow battery (VRB) is one of the excellent green energy storage batteries with strong development momentum (it does not produce harmful substances during its manufacture, use and disposal), and it has a special battery structure, can be deeply discharged with high current density; fast charging; high specific energy; l...

Claims

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Application Information

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IPC IPC(8): H01M8/02H01M10/02H01M8/18H01M10/36H01M12/02H01M12/00H01M8/20H01M8/2455
CPCY02E60/528Y02E60/128Y02E60/10Y02E60/50
Inventor 崔旭梅陈孝娥刘国钦王军
Owner PANZHIHUA UNIV
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