Vanadium phosphate nano material with porous network structure and preparation method thereof
A vanadium phosphate nanometer and network structure technology, applied in structural parts, chemical instruments and methods, phosphorus compounds, etc., can solve the problems of poor electrical conductivity of electrode materials, and achieve the effects of low production cost, simple operation process and high capacity.
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Embodiment 1
[0051] This embodiment discloses a vanadium phosphate nanomaterial with high purity, good crystallinity, and excellent electrical conductivity and a porous network structure, and a preparation method. The vanadium phosphate nanomaterial is applied to the negative electrode material of a lithium ion battery. First, chemical vapor deposition ( CVD) to grow a graphene foam structure, and then use a hydrothermal method to grow porous, uniformly distributed vanadium phosphate (VPO) on the self-supporting graphene foam structure. 4 ) network nanomaterials, in vanadium phosphate (VPO 4 ) into the precursor solution of citric acid to carry out carbon mixing treatment, so that the conductivity of the material is further improved.
[0052] This embodiment proposes a vanadium phosphate nanomaterial with a porous network structure as a lithium-ion battery negative electrode material and a preparation method thereof, the steps of which include:
[0053] 1) Dissolve low-priced vanadium sou...
Embodiment 2
[0064] In the synthesis process of the self-supporting vanadium phosphate / graphene foam composite nanomaterial, the following steps are mainly involved:
[0065] 1) Dissolve 0.364g of vanadium pentoxide, 0.460g of ammonium dihydrogen phosphate, and 0.96g of citric acid in 30mL of DI water, and stir at 80°C for 2h;
[0066] 2) After the mixed solution in step 1) is stirred, use concentrated ammonia water to adjust the pH value of the solution to 7, then transfer the reaction solution to a 50mL reaction kettle, and react in an oven at 200°C for 20h;
[0067] 3) After step 2) the reaction is finished, cool to room temperature, and collect the self-supporting vanadium phosphate / graphene composite nanomaterial;
[0068] 4) Rinse the sample obtained in step 3) three times with deionized water, and dry the self-supporting electrode material in an oven at 80°C;
[0069] 5) Put the dried sample in step 4) for calcination in a tube furnace, place it in an argon atmosphere, and pre-calc...
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