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a nano v 2 o 5 preparation method

A V2O5, nanotechnology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of complex process control, high cost, uncontrollable morphology and particles, and achieve uniform particle size distribution, The effect of short time and good electrochemical lithium storage capacity

Active Publication Date: 2020-02-04
CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods have problems such as complicated process control, uncontrollable particle shape and high cost, which limit the V 2 o 5 In the application of lithium-ion batteries, it is of great practical significance to seek a low-cost method that can effectively control the morphology of V2O5 nanomaterials.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0019] Nano V 2 o 5 The preparation method comprises the following steps: mixing and stirring vanadium-containing substances, chelating agents, and surfactants in water until they are completely dissolved to obtain a precursor solution; the precursor solution is continuously stirred at room temperature or heated. Treatment, precipitation occurs in the system, the precipitate is filtered, washed, and dried to obtain nano V 2 o 5 .

[0020] In the method of the present invention, the precursor solution is prepared to obtain V 2 o 5 The conditions for precipitation are not particularly limited, and stirring at room temperature is enough, but it takes a long time and is less efficient than heating. There is no particular limitation on the heating method, and any conventional heating method is acceptable. However, in order to ensure the uniformity of heating, it is preferred to adopt microwave heating.

Embodiment 1

[0022] (1) Weigh 5g NH 4 VO 3 , add 0.2g citric acid, CTAB 0.1g, stir for 2h, dissolve completely, and make NH with a concentration of 0.1mol / L 4 VO 3 aqueous solution;

[0023] (2) The precursor solution prepared in step (1) was assisted by microwave synthesis, the power was 700W, the frequency was 2450Hz, the reaction time was 10 minutes, and the solution had brick red precipitation;

[0024] (3) Wash with deionized water and alcohol for 3 times, and dry at 80°C to prepare nano-V 2 o 5 .

Embodiment 2

[0026] (1) Weigh 2g VOSO 4 , add 0.1g of polyacrylic acid, add 0.1g of EDTA, stir for 3 hours, dissolve completely, and configure an aqueous solution with a vanadium ion concentration of 0.2mol / L;

[0027] (2) Synthesize the precursor solution prepared in step (1) in the air by microwave-assisted synthesis, the power is 700W, the frequency is 2450Hz, the reaction time is 15 minutes, and the solution has brick red precipitation;

[0028] (3) Wash with deionized water and alcohol for 3 times, and dry at 80°C to prepare nano-V 2 o 5 .

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Abstract

The invention belongs to the field of lithium battery electrode materials and in particular relates to a preparation method of nano-V2O5. The invention aims to provide the preparation method of the nano-V2O5; the preparation method comprises the following steps: uniformly stirring and mixing a vanadium-containing substance, a chelate compound and a surfactant to prepare a precursor solution; enabling the precursor solution to react under a room-temperature or heating condition; separating out sediment; filtering to obtain a solid; washing and drying the solid to obtain the nano-V2O5. The method provided by the invention is simple to operate and the nano-grade V2O5 can be prepared.

Description

technical field [0001] The invention belongs to the field of lithium battery electrode materials, in particular to a nano V 2 o 5 method of preparation. Background technique [0002] V 2 o 5 It is a typical layered structure (covalent bonds with strong binding force in the layer and weak van der Waals force between layers), which can make small molecules or ions freely embedded or extracted. As a lithium-ion battery cathode material, its theoretical capacity is as high as 290mAh / g, but V 2 o 5 As a lithium-ion cathode material, there are two major problems, namely poor rate performance and cycle stability. [0003] Nanomaterials have a higher specific surface area and more active sites. As a lithium ion cathode material, the contact area with the electrolyte is large, and the distance between delithiation and lithium intercalation is short, which can effectively improve the electrochemical activity of the electrode material. Therefore, the preparation of V 2 o 5 Nano...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G31/02H01M4/485H01M10/0525B82Y30/00
CPCB82Y30/00C01G31/02C01P2004/64H01M4/485H01M10/0525Y02E60/10
Inventor 韩慧果彭穗陈勇龙秀丽
Owner CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
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