A kind of cathode material of vanadium heptoxide zinc ion battery and preparation method thereof
A technology of vanadium-zinc heptoxide and vanadium-zinc oxide, which is applied in vanadium oxide, battery electrodes, secondary batteries, etc., and can solve the problem of single vanadium heptoxide shape, unsuitability for zinc-ion batteries, and high energy consumption, etc. problems, to achieve the effect of uniform morphology, excellent electrochemical performance, and fast heating rate
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Embodiment 1
[0025] Accurately weigh 234 mg (2 mmol) of ammonium metavanadate and 252 mg (2 mmol) of oxalic acid dihydrate, add them to 30 mL of deionized water, stir magnetically until the solution is clear, then add the resulting solution into a microwave reactor, and react at 180 ° C for 2 Hours, naturally cooled to room temperature, the obtained precipitate was washed 3 times with deionized water and absolute ethanol successively, and finally the washed precipitate was freeze-dried for 48 hours to obtain the nano flower-like structure V 3 o 7 Cathode material.
[0026] figure 1 It is the X-ray diffractogram of the product obtained in this example. After analysis, it can be known that the sample is vanadium heptoxide. figure 2 It is the scanning electron micrograph of the product obtained in this embodiment, from which it can be seen that the sample obtained in this embodiment is a nano flower-like structure (5-10um), specifically, the structure is assembled by nanoribbons (nanoribbo...
Embodiment 2
[0028] Accurately weigh 117mg (1mmol) ammonium metavanadate, 91mg (0.5mmol) vanadium pentoxide, 162mg (1mmol) oxalic acid dihydrate, 118mg (1mmol) succinic acid, add to 30mL deionized water, stir magnetically until the solution is clear , and then add the obtained solution into a microwave reactor, react at 120°C for 3 hours, cool to room temperature naturally, wash the obtained precipitate three times with deionized water and absolute ethanol successively, and finally wash the precipitate After 48 hours of freeze-drying, the nanoflower-like structure V was obtained 3 o 7 Cathode material.
Embodiment 3
[0030] Accurately weigh 1053 mg (9 mmol) of ammonium metavanadate and 1134 mg (9 mmol) of oxalic acid dihydrate, add them to 30 mL of deionized water, stir magnetically until the solution is clear, then add the resulting solution into a microwave reactor, and react at 200 ° C for 0.5 Hours, naturally cooled to room temperature, the obtained precipitate was washed 3 times with deionized water and absolute ethanol successively, and finally the washed precipitate was freeze-dried for 48 hours to obtain the nano flower-like structure V 3 o 7 Cathode material.
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