Porous VO2 nano-wire as well as preparation method and application thereof

Abstract

The invention relates to a preparation method of a porous VO2 nano-wire. The preparation method comprises the following steps: (1) measuring deionized water, placing the deionized water into a beaker, and maintaining a water-bath stirring state; (2) measuring ammonium metavanadate powder, adding the ammonium metavanadate powder into the beaker, and stirring continuously; (3) taking out the beaker, stirring while cooling the beaker to room temperature, slowly adding hydrochloric acid into the beaker, stirring continuously, and adjusting the pH value while keeping the stirring state; (4) transferring the obtained solution into a reaction kettle, heating the reaction kettle to facilitate a reaction, taking out the reaction kettle, and naturally cooling the reaction kettle to room temperature; (5) placing the obtained product, namely an NH4V3O8 nano-wire, into a plastic pipe, and drying the NH4V3O8 nano-wire in a drying box; and (6) sintering the NH4V3O8 nano-wire to finally obtain the porous VO2 nano-wire. The porous VO2 nano-wire and the preparation method have the beneficial effects that the nano-wire is excellent in cycling characteristic and serves as a potential application material of a long-service-life lithium ion battery; the process is simple, the adopted simple hydrothermal method and calcining process have low requirements on equipment, the expanded production is likely to realize, and the market popularization can be favored.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials and electrochemistry, and in particular relates to a porous VO 2 The preparation method of nanowire, the material can be used as a novel high-capacity lithium-ion battery positive electrode active material. Background technique [0002] As a green energy, lithium-ion batteries have been widely used in daily life, such as mobile phones, notebook computers and other electronic products. The rapid rise of the new energy vehicle field will definitely bring a broader development space for lithium-ion batteries. The natural resources of the world's manganese ore are very rich and therefore relatively cheap. The research on lithium-ion battery electrode materials with longer cycle life, higher reversible capacity, and lower production cost is one of the frontiers and hotspots of current research. VO 2 With a special layered structure and high capacity, it is considered to be the most potential ...

AI Technical Summary

Problems solved by technology

VO 2 With a special layered structure and high capacity, it is considered to be the most potential high-capacity lithium-ion battery cathode material, but its poor cycle performance, low electronic conductivity and ionic conductivity severely restrict its use in lithium-ion batteries. Application in battery

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