Ultra-long single crystal V2O5 nano wire/graphene anode material and preparation method
A V2O5, cathode material technology, applied in battery electrodes, structural parts, electrical components, etc., can solve problems such as large toxic gases, improve kinetic characteristics, achieve large-scale production, and facilitate operation.
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Embodiment 1
[0033] First, dissolve 0.364 g of V2O5 powder (99.8%) in 20 mL of deionized water, then add 4.0 mL of 30% H 2 o 2 And keep stirring at room temperature for 2 hours; meanwhile, dissolve 0.0182g (5wt%ofV2O5) commercial graphite (KS-6) in 10mL deionized water, then add 3.0mL30%H to the above solution under mechanical stirring 2 o 2 and sonicated at 100W for 6h; then, the above two solutions were mixed into a 50mL autoclave, and kept at 205°C for 5 days; finally, the product was washed with deionized water, centrifuged for 30 minutes, and dried in a vacuum oven at 80°C for 12 hour, and then annealed at 400° C. for 30 minutes in an air atmosphere to obtain an ultralong single crystal V2O5 nanowire / graphene composite positive electrode material. SEM and TEM analysis ( figure 2 , image 3 , Figure 4 , Figure 5 , Figure 6 ) shows that V with a length of about tens of microns 2 o 5 The nanowires are orderly distributed on the surface and interlayer of transparent graphene n...
Embodiment 2
[0035] First, 0.182g of V2O5 powder (99.8%) was dissolved in 10mL of deionized water, then 5.0mL of isopropanol was added to the above solution under mechanical stirring and the stirring was continued at room temperature for 4 hours; at the same time, 0.0091g (5wt% ofV2O5) Commercial graphite (super-p) was dissolved in 5 mL of deionized water, then 1.5 mL of isopropanol was added to the above solution under mechanical stirring and ultrasonically degraded at 100 W for 4 h; then, the above two solutions were mixed into a 50 mL autoclave, Keep at 210°C for 4 days; finally, the product is washed with deionized water, centrifuged for 30 minutes, dried in a vacuum oven at 80°C for 12 hours, and annealed at 400°C for 30 minutes in an air atmosphere to obtain VO 2 Nanorod / graphene composite cathode material. X-ray diffraction analysis showed that the final product contained GNS and VO respectively 2 Diffraction peak, and VO 2 GNSs in nanorod / graphene composites maintain their orig...
Embodiment 3
[0037] Will 0.364g V 6 o 13 The powder was dissolved in 20 mL of deionized water, and then 4.0 mL of 30% H was added to the above solution under mechanical stirring 2 o 2 And keep stirring at room temperature for 2 hours; at the same time, dissolve 0.0364g (10wt%ofV6O13) commercial expandable graphite in 10mL deionized water, then add 3.0mL 30%H to the above solution under mechanical stirring 2 o 2and sonicated at 100W for 12; then, the above two solutions were mixed into a 50mL autoclave, and roasted at 215°C for 8 days; finally, the product was washed with deionized water, centrifuged for 30 minutes, and dried in a vacuum oven at 80°C for 12 Hours, annealing at 400° C. for 30 minutes in an air atmosphere to obtain a nanostructured vanadium oxide / graphene composite positive electrode material. X-ray diffraction analysis shows that the final product contains GNS and vanadium oxide diffraction peaks respectively, and the electrochemical test results show that the nanostruct...
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