Carbon-confined vanadium trioxide hollow microspheres, preparation method and application thereof
A vanadium trioxide confinement technology, applied in the field of vanadium trioxide hollow microspheres and its preparation, can solve the problems of low electronic conductivity and achieve high specific capacity, high rate performance, and good cycle stability
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Embodiment 1
[0028] The preparation method of the vanadium trioxide hollow microsphere of carbon confinement, it comprises the steps:
[0029] 1) Weigh 0.5 g of vanadium acetylacetonate and add it to 40 ml of DMF, stir with a magnetic stirrer for 20 minutes to obtain a dark green clear solution;
[0030] 2) Weigh 1g of dimethylimidazole and add it to 40ml of DMF, stir with a magnetic stirrer for 20 minutes to obtain a transparent and clear solution, then add the solution to the solution obtained in step 1), and stir for 20 minutes to obtain a clear mixed solution ;
[0031] 3) Transfer the mixed solution obtained in step 2) to a 100ml reaction kettle, heat it in water at 200°C for 12 hours, then take it out and cool it to room temperature naturally to obtain a green product;
[0032] 4) The suspension obtained in step 3) was centrifuged and washed 3 times with absolute ethanol, and dried in an oven at 70° C. for 12 hours;
[0033] 5) The dried product obtained in step 4) was placed in a ...
Embodiment 2
[0039] The preparation method of the vanadium trioxide hollow microsphere of carbon confinement, it comprises the steps:
[0040] 1) Weigh 1 g of vanadium acetylacetonate and add it to 40 ml of DMF, stir with a magnetic stirrer for 20 minutes to obtain a dark green clear solution;
[0041] 2) Weigh 2g of dimethylimidazole and add it to 40ml of DMF, stir with a magnetic stirrer for 20 minutes to obtain a transparent and clear solution, then add the solution to the solution obtained in step 1), and stir for 20 minutes to obtain a clear mixed solution ;
[0042] 3) Transfer the mixed solution obtained in step 2) to a 100ml reaction kettle, heat it in water at 200°C for 12 hours, then take it out and cool it to room temperature naturally to obtain a green product;
[0043] 4) The suspension obtained in step 3) was centrifuged and washed 3 times with absolute ethanol, and dried in an oven at 70° C. for 12 hours;
[0044] 5) The dried product obtained in step 4) was placed in a hi...
Embodiment 3
[0046] The preparation method of the vanadium trioxide hollow microsphere of carbon confinement, it comprises the steps:
[0047] 1) Weigh 0.5 g of vanadium acetylacetonate and add it to 40 ml of DMF, stir with a magnetic stirrer for 20 minutes to obtain a dark green clear solution;
[0048] 2) Weigh 1g of dimethylimidazole and add it to 40ml of DMF, stir with a magnetic stirrer for 20 minutes to obtain a transparent and clear solution, then add the solution to the solution obtained in step 1), and stir for 20 minutes to obtain a clear mixed solution ;
[0049] 3) Transfer the mixed solution obtained in step 2) to a 100ml reaction kettle, heat it in water at 200°C for 24 hours, then take it out and cool it to room temperature naturally to obtain a green product;
[0050] 4) The suspension obtained in step 3) was centrifuged and washed 3 times with absolute ethanol, and dried in an oven at 70° C. for 12 hours;
[0051] 5) The dried product obtained in step 4) was placed in a ...
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