A paper-based all-vanadium redox flow battery electrode material and its preparation and application
A technology of all-vanadium redox flow battery and electrode material, which is applied in battery electrodes, fuel cells, regenerative fuel cells, etc., and can solve the problems of cost reduction of all-vanadium redox flow battery systems, poor electrocatalytic activity of graphite felt, and electrochemical polarization of batteries. Large and other problems, to achieve high practical value, low cost, and reduce the effect of ohmic polarization
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Embodiment 1
[0024] Soak industrial filter paper with a thickness of 0.5mm and a pore size of 80-120μm in 0.1M hydrochloric acid solution for 10h, then take it out and soak it in 0.1M NaOH solution for 10h, then take it out and dry it. Then it was heat-treated at 2200°C in a nitrogen atmosphere, the heating rate was 5°C / min, and the high-temperature treatment time was 30 minutes; finally, it was activated at 450°C in an air atmosphere, and the treatment time was 1h; To obtain the final carbon fiber paper electrode material. Its SEM photos are as figure 1 As shown, the complete pore structure can be maintained.
[0025] A carbon fiber paper with a size of 8 cm×6 cm was cut from the carbon fiber paper electrode material prepared in Example 1 as an electrode, assembled into a single cell, and tested for charge and discharge performance. The positive electrolyte is 1.5M VO 2+ 3M H 2 SO 4 Solution 60ml, negative electrode electrolyte is 1.5M V 3+ 3M H 2 SO 4 The solution is 60ml, and th...
Embodiment 2
[0027] Soak industrial filter paper with a thickness of 0.3 mm and a pore size of 80-120 μm in 1M hydrochloric acid solution for 5 hours, then take it out and soak it in 1M NaOH solution for 5 hours, then take it out and dry it. Then it was heat-treated at 1800°C in a nitrogen atmosphere, the heating rate was 5°C / min, and the high-temperature treatment time was 30 minutes; finally, it was activated at 400°C in an air atmosphere for 2 hours; To obtain the final carbon fiber paper electrode material.
Embodiment 3
[0029] Soak industrial filter paper with a thickness of 0.5mm and a pore size of 80-120μm in 0.5M hydrochloric acid solution for 10 hours, then take it out and soak it in 0.5M NaOH solution for 10 hours, then take it out and dry it. Then it was heat-treated at 2800°C in a nitrogen atmosphere, the heating rate was 5°C / min, and the high-temperature treatment time was 30 minutes; finally, it was activated at 500°C in an air atmosphere, and the treatment time was 1h; To obtain the final carbon fiber paper electrode material.
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