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Tremella-like V2O5 lithium ion battery cathode material adopting hollow core-shell structure and preparation method of cathode material

A lithium vanadium pentoxide, core-shell structure technology, applied in battery electrodes, secondary batteries, structural parts, etc., can solve the problems of poor electrical conductivity and structural stability, difficult to obtain reversible capacity and cycle performance, and achieve low cost, Easy operation, high charge and discharge efficiency

Inactive Publication Date: 2018-06-01
HUNAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are still disadvantages of poor conductivity and structural stability, which makes it difficult to obtain high reversible capacity and good cycle performance. In order to obtain and maintain V 2 o 5 High reversible capacity, good cycle performance and excellent rate capability of electrode materials are still a big challenge

Method used

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  • Tremella-like V2O5 lithium ion battery cathode material adopting hollow core-shell structure and preparation method of cathode material
  • Tremella-like V2O5 lithium ion battery cathode material adopting hollow core-shell structure and preparation method of cathode material
  • Tremella-like V2O5 lithium ion battery cathode material adopting hollow core-shell structure and preparation method of cathode material

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Embodiment 1

[0042] This embodiment provides a method for preparing a positive electrode material for a vanadium pentoxide lithium ion battery with a tremella-shaped hollow core-shell structure, comprising the following steps:

[0043] S1. Place 100mg of hollow carbon spheres in a 100ml beaker, add 40ml of organic solvent ethylene glycol into the beaker filled with hollow carbon spheres, then place on a magnetic stirrer, stir for 10min, and obtain suspension A;

[0044] S2. Measure 25ml of urea into another beaker, add 10ml of deionized water, stir to completely dissolve the urea, then add 150mg of ammonium metavanadate, stir at 50°C to completely dissolve the ammonium metavanadate, and obtain a light yellow transparent sol B;

[0045] S3. Add light yellow transparent sol B to suspension A, keep stirring in a water bath at 50°C, then transfer to a reaction kettle, and conduct hydrothermal reaction at 180°C for 12 hours. After the reaction, centrifuge to obtain black The product, the black...

Embodiment 2

[0054] This embodiment provides a method for preparing a positive electrode material for a vanadium pentoxide lithium ion battery with a tremella-shaped hollow core-shell structure, comprising the following steps:

[0055] S1. Place 150mg of hollow carbon spheres in a 100ml beaker, add 50ml of organic solvent ethylene glycol into the beaker filled with hollow carbon spheres, then place on a magnetic stirrer, stir for 10min, and obtain suspension A;

[0056] S2. Measure 30ml of urea in another beaker, add 10ml of deionized water, stir to completely dissolve the urea, then add 200mg of ammonium metavanadate, stir at 50°C to completely dissolve the ammonium metavanadate, and obtain a light yellow transparent sol B;

[0057] S3. Add light yellow transparent sol B to suspension A, keep stirring in a water bath at 50°C, then transfer to a reaction kettle, and conduct a hydrothermal reaction at 200°C for a reaction time of 24 hours. After the reaction, centrifuge to obtain black The...

Embodiment 3

[0063] This embodiment provides a method for preparing a positive electrode material for a vanadium pentoxide lithium ion battery with a tremella-shaped hollow core-shell structure, comprising the following steps:

[0064] S1. Place 200mg of hollow carbon spheres in a 100ml beaker, add 45ml of organic solvent ethylene glycol into the beaker filled with hollow carbon spheres, then place on a magnetic stirrer, stir for 10min, and obtain suspension A;

[0065] S2. Measure 26ml of urea in another beaker, add 10ml of deionized water, stir to completely dissolve the urea, then add 100mg of ammonium metavanadate, stir at 50°C to completely dissolve the ammonium metavanadate, and obtain a light yellow transparent sol B;

[0066] S3. Add light yellow transparent sol B to suspension A, keep stirring in a water bath at 50°C, then transfer to a reaction kettle, and conduct a hydrothermal reaction at 190°C for a reaction time of 16 hours. After the reaction, centrifuge to obtain black The...

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Abstract

The invention relates to the technical field of lithium ion cathode materials and discloses a tremella-like V2O5 lithium ion battery cathode material adopting a hollow core-shell structure and a preparation method of the cathode material. The tremella-like V2O5 lithium ion battery cathode material adopting the hollow core-shell structure is prepared from raw materials including ethyl orthosilicate, m-dihydroxybenzene, formaldehyde, ammonium metavanadate and the like with a simple hydrothermal method. The electrical conductivity and stability of the existing V2O5 cathode material are greatly improved by the tremella-like hollow core-shell structure C@V2O5 with the special morphology, so that the electrochemical performance of the cathode material is significantly improved. The specific surface area is enlarged and the electrochemical performance is improved due to the tremella-like morphology. The electrical conductivity of the material is improved due to existence of hollow carbon spheres. The stability of the material is greatly improved by the hollow structure.

Description

technical field [0001] The invention relates to the technical field of lithium-ion positive electrode materials, and more specifically, relates to a tremella-shaped hollow core-shell structure vanadium pentoxide lithium-ion battery positive electrode material and a preparation method thereof. Background technique [0002] As an efficient and environmentally friendly electrochemical energy storage device, lithium-ion batteries are widely used in various mobile electronic products, and have great application prospects in emerging fields such as electric vehicles and smart grids. However, the low energy and power density of current lithium-ion batteries limits their application in electric and hybrid vehicles. [0003] Among the various components of the lithium-ion battery, the performance of the cathode material is particularly important, and its performance greatly restricts the improvement of the overall performance of the lithium-ion battery. Traditional lithium-ion batte...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/485H01M4/62H01M10/0525B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M4/366H01M4/485H01M4/62H01M4/625H01M10/0525Y02E60/10
Inventor 周伟郑佳玲毛宇轩
Owner HUNAN UNIV OF TECH
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