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Novel cathode material of vanadium oxide nanometer lithium ion battery and preparation method thereof

A lithium-ion battery and cathode material technology, which is applied in the direction of battery electrodes, circuits, electrical components, etc., can solve problems such as not found, and achieve the effects of improving conductivity, simple operation, and low cost

Inactive Publication Date: 2011-11-16
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] At present, there is no patent report on the preparation of vanadium oxynano lithium-ion battery cathode materials by induction of carbon nanotubes using vanadium oxide or vanadium powder, and hydrogen peroxide as raw materials

Method used

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  • Novel cathode material of vanadium oxide nanometer lithium ion battery and preparation method thereof
  • Novel cathode material of vanadium oxide nanometer lithium ion battery and preparation method thereof
  • Novel cathode material of vanadium oxide nanometer lithium ion battery and preparation method thereof

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Effect test

Embodiment 1

[0026] Embodiment 1: a kind of preparation method of lithium battery cathode material, comprises the following steps,

[0027] 1. Preparation of Vanadium Oxysol

[0028] Vanadyl sol was prepared by sol-gel method, and 1gV 2 o 5 The powder and hydrogen peroxide (30% concentration) are mixed at a mass / volume ratio of 1:30 (g / ml), stirred magnetically in a water bath at 5°C, and will be accompanied by violent oxygen and heat release shortly thereafter. The whole process takes about 1 hour . Finally, an orange-red vanadium oxysol is generated.

[0029] 2. Dispersion of carbon nanotubes

[0030] Take 1 g of original carbon nanotubes and add them into 50 mL of concentrated sulfuric acid / concentrated nitric acid with a volume ratio of 5:1, and react for 1 hour. After cooling, centrifuge at 1000 rpm for 10 minutes to remove the mixed acid in the upper layer, then filter and wash until neutral.

[0031] 3. Preparation of colloidal suspension

[0032] The prepared vanadyl sol was...

Embodiment 2

[0041] 1. Preparation of Vanadium Oxysol

[0042] Vanadyl sol was prepared by sol-gel method, and 1gV 2 o 3 The powder and hydrogen peroxide (30% concentration) are mixed at a mass / volume ratio of 1:20 (g / ml), stirred magnetically in a water bath at 5°C, and will be accompanied by violent oxygen and heat release shortly thereafter. The whole process takes about 1 hour . Finally, an orange-red vanadium oxysol is generated.

[0043] 2. Dispersion of carbon nanotubes

[0044] 1 g of original carbon nanotubes was added into 50 mL of concentrated sulfuric acid / concentrated nitric acid with a volume ratio of 7:1, and reacted for 1 hour. After cooling, centrifuge at 1000 rpm for 10 minutes to remove the mixed acid in the upper layer, then filter and wash until neutral.

[0045] 3. Preparation of colloidal suspension

[0046] The prepared vanadyl sol was mixed with 0.2 g of dispersed carbon tubes and magnetically stirred for ~1 hour until a black colloidal suspension was formed....

Embodiment 3

[0055] 1. Preparation of Vanadium Oxysol

[0056] Prepare vanadium oxysol by sol-gel method, mix 1g of vanadium powder and hydrogen peroxide (30% concentration) at a mass / volume ratio of 1:40 (g / ml), stir magnetically in a water bath at 5°C, and soon thereafter With intense oxygen and heat release, the whole process takes about 1 hour. Finally, an orange-red vanadium oxysol is generated.

[0057] 2. Dispersion of carbon nanotubes

[0058] Take 1g of original carbon nanotubes and add 100mL60 o C in water, magnetically stirred for 2 days, then filtered and washed to neutral.

[0059] 3. Preparation of colloidal suspension

[0060] The prepared vanadyl sol was mixed with 0.18 g of dispersed carbon tubes and magnetically stirred for ~1 hour until a black colloidal suspension was formed.

[0061] 4. Preparation of vanadium oxide nanosheets under hydrothermal conditions

[0062] The black colloidal turbid liquid was transferred into a hydrothermal reaction kettle for 2 days of...

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Abstract

The invention relates to a novel cathode material of a vanadium oxide nanometer lithium ion battery and a preparation method thereof. According to the invention, vanadium oxide or vanadium powder, a carbon nano tube and hydrogen peroxide are taken as main raw materials, and a nano flaky composite material is prepared under a hydrothermal condition by using a sol-gel method. Serving as the cathodematerial of the lithium ion battery, the nanoo vanadium oxide flake provided by the invention has a unique and very flat charge and discharge platform, thus the charge and discharge action of the material with high ratio capacity can be realized within a thinner voltage range; and in addition, high ration capacity and favorable circulating reversibility of the nano flaky material are reveled under the condition of high rate discharge.

Description

technical field [0001] The invention belongs to the field of lithium ion batteries, and in particular relates to a novel vanadium oxide nanometer lithium ion battery cathode material and a preparation method thereof. Background technique [0002] Since the 1990s, as people's energy shortage problem has deepened, the demand for lithium-ion secondary batteries has become increasingly strong. Especially in recent years, with the rapid development of microelectronics industry, medical engineering, electric vehicles, space technology, military industry and other fields, the application range of lithium-ion batteries is becoming wider and wider, and the requirements for the performance of lithium-ion batteries are also increasing high. The characteristics of a Li-ion battery depend strongly on its electrode materials, especially the cathode material, V 2 o 5 Due to its special layered structure, the material makes it better than other traditional cathode materials (LiMn 2 o 4...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/48H01M4/1391
CPCY02E60/12Y02E60/122Y02E60/10
Inventor 吴广明周小卫高国华杨辉宇王际超吴建栋
Owner TONGJI UNIV
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