Carbon-coated vanadium trioxide nano material preparing method and lithium ion batteries

A vanadium trioxide, lithium ion battery technology, applied in secondary batteries, battery electrodes, nanotechnology and other directions, can solve the problems of poor cycle and rate performance, agglomeration and electrode powder, harsh synthesis conditions, etc., to achieve the reaction speed Fast, easy material structure, uniform morphology

Active Publication Date: 2016-10-12
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Application Information

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Problems solved by technology

The possible reasons include two aspects: one is V 2 o 3 The synthesis conditions are harsh and difficult to synthesize; the second is that the prepared low-dimensional V 2 o 3 Nanomaterials (such as zero-dimensional nanoparticles, one-dimensional nanowires, two-dimensional nanosheets, etc.) will undergo large volume expansion during the cycle, and there will also be disadvantages such as agglomeration and electrode pulverization, which will lead to its cycle and Magnification performance is poor

Method used

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  • Carbon-coated vanadium trioxide nano material preparing method and lithium ion batteries
  • Carbon-coated vanadium trioxide nano material preparing method and lithium ion batteries
  • Carbon-coated vanadium trioxide nano material preparing method and lithium ion batteries

Examples

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Embodiment 1

[0030] This embodiment is for the preparation of V 2 o 3 nanoparticle approach. Specific steps are as follows:

[0031] (1) Preparation of VO 2 (B) @C nanosheet precursor

[0032] Using high temperature mixed hydrothermal method, according to V 2 o 5 The molar ratio of glucose and glucose was 1:1, weighed and placed in two reaction chambers of a special high-temperature mixed hydrothermal reactor, and added 5ml of deionized water respectively. Then put the reaction kettle into the oven to heat up after sealing, and when the temperature of the oven rises to 200 ° C, the reaction kettle is rotated so that the reactants in the two chambers in the reaction kettle are mixed for hydrothermal reaction, and the heat preservation is continued for 6 hours . After the completion of the hydrothermal reaction, cool to room temperature to obtain VO 2 (B) @C nanomaterials, and washed several times with deionized water and absolute ethanol, put the obtained powder in a vacuum drying...

Embodiment 2

[0038] This example is to prepare 3D hierarchical porous V 2 o 3 @C micro-nano structure method. Specific steps are as follows:

[0039] (1) Preparation of 3D hierarchical porous VO 2 (B) @C micro-nano structure precursor

[0040] Using high temperature mixed hydrothermal method, according to V 2 o 5 The molar ratio of glucose and glucose was 1:1, weighed and placed in two reaction chambers of a special high-temperature mixed hydrothermal reactor, and added 5ml of deionized water respectively. Then put the reaction kettle into the oven to heat up after sealing. When the oven temperature rises to 240 ° C, the reaction kettle is rotated so that the reactants in the two chambers in the reaction kettle are mixed for hydrothermal reaction, and the heat preservation is continued for 6 hours. . After the completion of the hydrothermal reaction, cool to room temperature to obtain VO 2 (B) @C nanomaterials, and washed several times with deionized water and absolute ethanol, p...

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Abstract

The invention discloses a carbon-coated vanadium trioxide (V2O3) nano material preparing method. The method comprises that different morphologies of carbon-coated VO2(B) (VO2(B)@C) nano materials synthesized by a high temperature mixed hydrothermal method are used as precursors, then the precursors are calcined to obtain V2O3 nano materials having different morphologies and including V2O3 nanoparticles and a three-dimensional (3D) hierarchical porous V2O3@C micro-nano structure. The prepared materials can be used as electrode materials of lithium ion batteries, wherein the 3D hierarchical porous V2O3@C micro-nano structure shows extremely excellent electrochemical performance; and the prepared materials have highly broad application prospects.

Description

technical field [0001] The invention relates to a method for preparing vanadium trioxide nanomaterials, in particular to a carbon-coated VO with different shapes synthesized by a high-temperature mixed hydrothermal method. 2 (B) (VO 2 (B)@C) Nanomaterials are precursors, and then these precursors are calcined to obtain different morphologies V 2 o 3 The nanometer material method, the prepared material can be used as lithium ion battery electrode material, and belongs to the field of energy storage materials. Background technique [0002] With the depletion of fossil fuels represented by coal, oil, and natural gas, and the increasing environmental problems such as the greenhouse effect and air pollution caused by the combustion of these traditional fossil fuels, the establishment of clean and renewable new energy as the basis The new energy structure is one of the most decisive technical fields in the world economy in the future. In this new energy structure, energy s...

Claims

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Application Information

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IPC IPC(8): H01M4/583H01M4/48H01M10/0525H01M4/1393H01M4/1391B82Y40/00
CPCB82Y40/00H01M4/1391H01M4/1393H01M4/366H01M4/48H01M4/483H01M4/583H01M10/0525Y02E60/10
Inventor 朱孔军刘鹏程李丽叶刘劲松王婧裘进浩
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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