Vanadium battery electrolyte preparation method
A technology of electrolyte and vanadium battery, which is applied in the field of preparation of electrolyte for vanadium batteries, can solve the problems of low electrolyte concentration, high price, poor stability, etc., and achieve the effect of high concentration, low price and excellent performance
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Embodiment 1
[0021] A kind of preparation method of electrolytic solution for vanadium battery that the present invention proposes, concrete operation is as follows:
[0022] First, place 1000g of V 2 o 5 (Industrial grade) After vacuum drying at 80°C for 16 hours, add 2.5L of hydrogen peroxide with a concentration (mass fraction) of 15wt%, heat and stir in a water bath at 70°C for 16h; then carry out suction filtration on the solution obtained from the above operation , rinsed repeatedly with deionized water, then transferred the product to 3L of sulfuric acid solution, the concentration of sulfuric acid solution was 6mol / L, heated to 80°C, kept at constant temperature and stirred for 20h; then, 500g of oxalic acid was added to the initial In the electrolyte, heat at 70°C for 12 hours; transfer the solution obtained above to the electrolytic cell, stir, and then control the applied potential of 0.8V for treatment, and at the same time pass N 2 Protect.
[0023] In this specific example...
Embodiment 2
[0027] First, place 500g of V 2 o 5 (Industrial grade) After vacuum drying at 80°C for 16 hours, add 2.5L of hydrogen peroxide with a concentration (mass fraction) of 15wt%, heat and stir in a water bath at 70°C for 16h; then carry out suction filtration on the solution obtained from the above operation , rinsed repeatedly with deionized water, then transferred the product to 3L of sulfuric acid solution, the concentration of sulfuric acid solution was 6mol / L, heated to 80°C, kept at constant temperature and stirred for 20h; then, 500g of oxalic acid was added to the initial In the electrolyte, heat at 70°C for 12 hours; transfer the solution obtained above to the electrolytic cell, stir, and then control the applied potential of 0.8V for treatment, and at the same time pass N 2 Protect.
[0028] The obtained vanadium battery electrolyte has good solubility, and the internal resistance of the diaphragm in the all-vanadium redox flow battery measured at room temperature is 0....
Embodiment 3
[0030] First, place 1000g of V 2 o 5 (Industrial grade) After vacuum drying at 80°C for 16 hours, add 2.5L of hydrogen peroxide with a concentration (mass fraction) of 15wt%, heat and stir in a water bath at 70°C for 16h; then carry out suction filtration on the solution obtained from the above operation , rinsed repeatedly with deionized water, then transferred the product to 3L of sulfuric acid solution, the concentration of sulfuric acid solution was 6mol / L, heated to 80°C, kept constant temperature and stirred for 20h; then, added 200g of oxalic acid to the initial In the electrolyte, heat at 70°C for 12 hours; transfer the solution obtained above to the electrolytic cell, stir, and then control the applied potential of 0.8V for treatment, and at the same time pass N 2 Protect.
[0031] The internal resistance of the separator in the all-vanadium redox flow battery measured at room temperature is 0.68Ωcm 2 , the effect is lower than that of specific example 1. Due to th...
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