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Carbon intercalation layer V2O3 nanometer material and preparation method and application thereof

A nanomaterial and nanotechnology, applied in structural parts, electrical components, battery electrodes, etc., can solve the problems of low cycle life, low energy density, poor rate performance, etc., and achieve the effect of improving cycle stability and alleviating volume changes.

Active Publication Date: 2017-07-07
HUAZHONG UNIV OF SCI & TECH
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  • Description
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Problems solved by technology

[0005] Aiming at the above defects or improvement needs of the prior art, the present invention provides a carbon intercalation V 2 o 3 Nanobelt, its preparation method and its application in lithium-ion battery and sodium-ion battery negative electrode materials, the purpose of which is to obtain a carbon-intercalated V 2 o 3 Nano-materials, the nano-materials can not only contact carbon on the surface but the inner nano-matrix cannot contact the carbon layer with good conductivity, thus solving the problem of carbon-coated V in the current technology 2 o 3 The technical problems of low cycle life, low energy density and poor rate performance when nanomaterials are applied to lithium-ion batteries and sodium-ion battery anode materials

Method used

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  • Carbon intercalation layer V2O3 nanometer material and preparation method and application thereof
  • Carbon intercalation layer V2O3 nanometer material and preparation method and application thereof
  • Carbon intercalation layer V2O3 nanometer material and preparation method and application thereof

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preparation example Construction

[0038] The carbon intercalation V 2 o 3 A method for preparing a nanomaterial, comprising the steps of:

[0039] (1) Add vanadium pentoxide and organic amine liquid into water, mix uniformly to obtain a mixed solution, place it in a reactor for hydrothermal reaction, and obtain a hybrid precursor; wherein the concentration of vanadium pentoxide in the mixed solution 0.02-0.04g / mL;

[0040] (2) After drying the hybrid precursor obtained in step (1), pass through inert gas for carbonization to obtain carbon intercalation V 2 o 3 nanomaterials.

[0041] Wherein the organic amine described in step (1) is one or more of 3-phenylpropylamine, ethylenediamine, aniline or octylamine, the mixing method is ultrasonic mixing, and the hydrothermal reaction temperature is 180-200°C, The hydrothermal reaction time is 40-48 hours.

[0042] The inert gas in step (2) is nitrogen or argon, preferably argon, and the heating rate during carbonization is 3°C / min-20°C / min, preferably 3°C / min-5...

Embodiment 1

[0049] The schematic diagram of the preparation method of this embodiment is as follows figure 1 shown, including the following steps:

[0050] The first step is to synthesize VO x / 3-phenylpropylamine nanoribbon precursor.

[0051] Will 0.81g V 2 o 5 The powder and 0.6 g of 3-phenylpropylamine liquid were added to 30 mL of water and stirred for 3 hours while being assisted by ultrasound to make the reaction mixture uniformly mixed. Afterwards, the reaction mixture was transferred to a reaction kettle and kept at 180° C. for 48 hours. After naturally cooling to room temperature, the product was removed with acetone to remove 3-phenylpropylamine that did not participate in the reaction, and then dried at 80° C. for 12 hours. A hybrid nanoribbon was obtained with the morphology as figure 2 shown. image 3 is the XRD pattern of the nanobelt precursor. The hydrothermal generation of the layered nanoribbon precursor was confirmed by XRD.

[0052] The second step, the syn...

Embodiment 2

[0060] The first step is to synthesize VO x / aniline precursor.

[0061] Will 0.6g V 2 o 5 The powder and 0.614 g of aniline were added to 30 mL of water and stirred for 3 hours while assisting with ultrasound to make the reaction mixture homogeneous. Afterwards, the reaction mixture was transferred to a reaction kettle and kept at 180° C. for 40 hours. Allow to cool to room temperature and then dry.

[0062] The second step, the synthesis of carbon intercalation V 2 o 3 nanomaterials.

[0063] VO x / aniline precursor, placed in an argon atmosphere, first heated to 400°C at a rate of 20°C / min, pre-carbonized at 400°C for 1 hour, and then raised to 600°C at a rate of 20°C / min , holding for 3 hours to obtain carbon intercalation V 2 o 3 nanomaterials. The length of the material obtained in this embodiment is 10-20 microns, the width is 0.5-1 microns, and the thickness is 60-90 nanometers, wherein V 2 o 3 The mass percentage of is 75.5%, and the content of C-N laye...

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Abstract

The invention discloses a preparation method and application of a carbon intercalation layer V2O3 nanometer material. The preparation method comprises the following steps of (1) adding vanadium pentoxide powder into an organic amine liquid, and uniformly stirring and mixing the powder; (2) transferring a mixed liquid to a reaction kettle for hydrothermal reaction; and (3) placing the obtained hybrid precursor in a furnace after drying, introducing an inert gas for carbonization to obtain a V2O3 / C hybrid nanometer material. The V2O3 / C hybrid nanometer material prepared by the method is uniform in morphology, and a carbon layer can be effectively dispersed in a nanometer substrate in the material. When the material is applied to a lithium ion battery or sodium ion battery negative electrode, the rate performance of a metal oxide used as an electrode material can be greatly improved, the volume energy density of the battery is improved, and the material has relatively large application prospect.

Description

technical field [0001] The invention belongs to the field of new energy and electrochemistry, in particular, relates to carbon intercalation V 2 o 3 Nanobelt, its preparation method and its application in lithium-ion battery and sodium-ion battery negative electrode material. Background technique [0002] With the depletion of traditional energy sources and the deterioration of environmental pollution, human demand for clean energy and renewable energy is increasing. Therefore, the field of new energy research has attracted great attention from scholars at home and abroad. Electrochemical energy storage has been extensively studied as a clean and pollution-free energy storage technology. Lithium-ion batteries have been successfully commercialized. They have many advantages such as light weight, long life, high specific energy density and specific power density, no pollution, and no memory effect. They are widely used in digital devices such as mobile phones, computers, ca...

Claims

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Application Information

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IPC IPC(8): H01M4/62
CPCH01M4/62H01M4/625Y02E60/10
Inventor 霍开富张家宝李庆伟
Owner HUAZHONG UNIV OF SCI & TECH
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