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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  • 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 performanc

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

Examples

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Example Embodiment

[0041] Example 1

[0042] This embodiment provides a method for preparing a cathode material of a white fungus-shaped hollow core-shell structure vanadium pentoxide lithium ion battery, which includes the following steps:

[0043] S1. Place 100mg of hollow carbon balls in a 100ml beaker, take 40ml of organic solvent glycol into the beaker containing the hollow carbon balls, then place it on a magnetic stirrer and stir for 10min to obtain suspension A;

[0044] S2. Measure 25ml of urea in another beaker, add 10ml of deionized water, stir to completely dissolve the urea, add 150mg of ammonium metavanadate, stir at 50℃ 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, and then transfer to a reaction kettle for hydrothermal reaction at 180°C, reaction time 12h, after reaction, centrifuge to get black The product, the black product is dried i...

Example Embodiment

[0053] Example 2

[0054] This embodiment provides a method for preparing a cathode material for a white fungus-shaped hollow core-shell structure vanadium pentoxide lithium ion battery, which includes the following steps:

[0055] S1. Place 150mg of hollow carbon balls in a 100ml beaker, take 50ml of organic solvent glycol into the beaker containing the hollow carbon balls, then place it on a magnetic stirrer and stir for 10min to 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℃ to completely dissolve the ammonium metavanadate to 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, reaction time 24h, after the reaction is centrifuged to get black The product, the black ...

Example Embodiment

[0062] Example 3

[0063] This embodiment provides a method for preparing a cathode material for a white fungus-shaped hollow core-shell structure vanadium pentoxide lithium ion battery, which includes the following steps:

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

[0065] S2. Measure 26ml of urea in another beaker, add 10ml of deionized water, stir to completely dissolve the urea, add 100mg of ammonium metavanadate, stir at 50℃ 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, and keep stirring in a water bath at 50°C, then transfer to the reaction kettle, carry out a hydrothermal reaction at 190°C, reaction time 16h, centrifuge after reaction to get black The product, the black produ...

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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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