Tungsten-doped vanadium dioxide nanopowder and preparation method for the same

A vanadium dioxide nanometer and vanadium dioxide technology are applied in the field of tungsten-doped vanadium dioxide nanometer powder and its preparation, which can solve the problems affecting the large-scale implementation of industrialization, the process is cumbersome, the powder is difficult to apply, etc. Large-scale industrial implementation, simple preparation method, and good dispersibility
CN102295312BActive Publication Date: 2013-07-03HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
Publication Date
2013-07-03

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Abstract

The invention discloses a tungsten-doped vanadium dioxide nanopowder and a preparation method for the nanopowder. The powder is flaky or conic rod-shaped tungsten-doped B-phase vanadium dioxide of which the chemical formula is V1-xWxO2; the flaky V1-xWxO2 is 1-10 nm thick, 350-450 nm wide and 3-5 mum long, and the conic tip diameter of the conic rod-shaped V1-xWxO2 is 15-25 nm, the cone length is110-150 nm, the rod diameter is 130-150 nm and the rod length is 1-2 mum; the preparation method comprises the following steps of: firstly, weighting vanadium pentoxide and ammonium tungstate according to a component ratio of the V1-xWxO2, melting the weighted vanadium pentoxide and ammonium tungstate and preserving heat for at least 20 minutes, then, dipping the molten mass in a quenching media and stirring for at least 12 hours, standing and aging for at least 10 days to obtain a doped sol, afterwards, adding polyethylene glycol aqueous solution into the doped sol, stirring for at least 8 hours to obtain mixed solution, and setting the mixed solution to be airtight for reaction for 2-6 days at the temperature of 180-220 DEG C so as to prepare the tungsten-doped B-phase vanadium dioxide powder. The tungsten-doped B-phase vanadium dioxide powder can be used as electrode material for lithium ion batteries; and after being annealed, the tungsten-doped B-phase vanadium dioxide powder canbe prepared into a phase-change metallic oxide material with wider application, namely, a tungsten-doped M-phase VO2.
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Description

technical field

[0001] The invention relates to a nano-powder and a preparation method thereof, in particular to a tungsten-doped vanadium dioxide nano-powder and a preparation method thereof. Background technique

[0002] Vanadium dioxide (VO 2 ) mainly exists in 4 polycrystalline forms, R-phase VO 2 , M-phase VO 2 , Phase A VO 2 and B-phase VO 2 ; Among them, B-phase VO 2 is the metastable phase, with V 2 o 5 Very similar layered structure, so it also resembles V 2 o 5 , V 6 o 13 Like other vanadium oxides, it can be used as an electrode material for lithium-ion batteries. Single tungsten-doped B-phase VO 2 With superparamagnetism, it exhibits nonlinear current / voltage properties and reversible infrared light response characteristics. For tungsten-doped B-phase VO 2 Annealing treatment can obtain tungsten-doped M-phase VO 2 , while the tungsten-doped M-phase VO 2 It is a phase-change metal oxide material, which will combine with R-phase VO at the phase-chan...

Claims

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