A kind of vanadium dioxide sodium ion battery negative electrode material and preparation method thereof
A technology of sodium vanadium dioxide, ion battery, applied in battery electrodes, circuits, electrical components, etc., can solve the problem of material cycle stability decline, and achieve the effect of facilitating infiltration, increasing specific surface area, and multiple reactive active sites
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Embodiment 1
[0025] Accurately weigh 300mg of vanadium pentoxide and 830mg of oxalic acid dihydrate, add them to 40mL of deionized water, stir magnetically at 80°C for 5min, (rotation speed is 500r / min), then transfer to a 50mL reaction kettle, at 200°C After reacting for 3h, washing and drying, the spindle-shaped VO 2 Negative material.
[0026] figure 1 It is the X-ray diffraction pattern of the product obtained in this example, and all X-ray powder diffraction peaks can be indexed as D-type vanadium dioxide. figure 2 It is a low-magnification scanning electron micrograph of the product obtained in this example, from which it can be seen that the sample obtained in this example is a nano-micro composite structure (1-10 μm) in the shape of a spindle. image 3 It is a high-magnification scanning electron microscope photo of the product obtained in this example, from which it can be seen that the nano-micro composite structure of the sample obtained in this example is assembled by nanoro...
Embodiment 2
[0028] Accurately weigh 75mg of vanadium pentoxide and 500mg of oxalic acid dihydrate, add them to 40mL of deionized water, stir magnetically at 90°C for 1min, at a speed of 600r / min, then transfer to a 50ml reaction kettle, and place in an environment of 180°C Reaction 5h. The collected samples were left standing and washed three times to obtain the spindle-shaped VO 2 Negative material.
Embodiment 3
[0030] Accurately weigh 1000mg of vanadium pentoxide and 500mg of oxalic acid dihydrate, add them into 40mL of deionized water, stir magnetically at 40°C for 30min, at a speed of 100r / min, then transfer to a 50ml reaction kettle, in an environment of 200°C Reaction 2h. The collected samples were left standing and washed three times to obtain the spindle-shaped VO 2 Negative material.
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