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Graphene-coating mesoporous carbon-base metal oxide as well as preparation method thereof and application

A technology of ene-coated mesoporous and mesoporous silica, applied in the field of graphene-coated mesoporous carbon-based metal oxides and its preparation, can solve the problem of affecting the electrochemical performance of metal oxides and the easy agglomeration of metal oxide particles , Mesoporous structure is easy to be destroyed, etc., to achieve excellent electrochemical properties, improve cycle performance and rate performance, and high charge and discharge capacity

Inactive Publication Date: 2014-03-19
BEIJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the mesoporous structure is easily destroyed during charging and discharging, and the metal oxide particles are easy to agglomerate, which affects the further improvement of the electrochemical performance of mesoporous carbon-based metal oxides.
However, there is no report on graphene-coated mesoporous carbon-based metal oxides

Method used

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  • Graphene-coating mesoporous carbon-base metal oxide as well as preparation method thereof and application
  • Graphene-coating mesoporous carbon-base metal oxide as well as preparation method thereof and application
  • Graphene-coating mesoporous carbon-base metal oxide as well as preparation method thereof and application

Examples

Experimental program
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Effect test

Embodiment 1

[0026] 1) Preparation of mesoporous silica SBA-15 template

[0027] 4.0g triblock copolymer P123 (EO 20 PO 70 EO 20 ) was dissolved in 130mL deionized water and 20mL hydrochloric acid (37%, HCl) mixed solution; 8.5g tetraethyl orthosilicate (TEOS) was added dropwise in a water bath at 35-40°C; after stirring for 24 hours, at 100-130°C Keep the temperature constant for 2-3 days; filter, wash, and dry, heat at 550°C for 5 hours, and cool to room temperature to obtain the SBA-15 template.

[0028] 2) Fill carbon-based nickel oxide (NiO) into the SBA-15 channel

[0029] Dissolve 1g of sucrose, 2g of nickel nitrate, and 0.1g of concentrated sulfuric acid into 10mL of deionized water, then add 1g of SBA-15, mix well and then dry at 100°C for 6 hours, and then dry at 160°C for 6 hours; grind the solid product and add Add to 10mL aqueous solution containing 0.5g sucrose, 1g nickel nitrate, 0.05g concentrated sulfuric acid, mix well and dry at 100°C for 6 hours, then dry at 160°C f...

Embodiment 2

[0040] 1) Preparation of Mesoporous Silica KIT-6 Template

[0041] Dissolve 3.0g of triblock copolymer P123 in 115mL of deionized water and 5mL of hydrochloric acid (37%, HCl) mixture; add 3.0g of butanol dropwise in a water bath at 35-40°C, react for 1 hour, and add dropwise 6.45g Orthoethyl silicate (TEOS); after stirring for 24 hours, keep the temperature at 100-130°C for 2-3 days; filter, wash, and dry, heat at 550°C for 5 hours, and cool to room temperature to obtain the KIT-6 template .

[0042] 2) Fill the KIT-6 channel with carbon-based copper oxide (CuO)

[0043] Dissolve 1g of sucrose, 3g of copper nitrate, and 0.1g of concentrated sulfuric acid into 10mL of deionized water, then add 1g of KIT-6, mix well and then dry at 100°C for 6 hours, then at 160°C for 6 hours; grind the solid product and add Add to 10mL aqueous solution containing 0.5g sucrose, 1.5g copper nitrate, 0.05g concentrated sulfuric acid, mix well and dry at 100°C for 6 hours, and then at 160°C for ...

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Abstract

The invention relates to a graphene-coating mesoporous carbon-base metal oxide as well as a preparation method of the graphene-coating mesoporous carbon-base metal oxide and application of the graphene-coating mesoporous carbon-base metal oxide. The preparation method of the graphene-coating mesoporous carbon-base metal oxide comprises the following steps of (1) preparing mesoporous silicon dioxide; (2) filling a pore channels of a silicon dioxide template with carbon-base metal oxide; (3) aminating the surface of the silicon dioxide template; (4) preparing graphene oxide; (5) preparing silicon dioxide with carbon-base metal oxide contained in the graphene-oxide-coating pore channels in a self-assembling way; (6) reducing the graphene oxide to the graphene; (7) removing the silicon dioxide template; and (8) centrifuging, washing and drying. The graphene-coatinng mesoporous carbon-base metal oxide has excellent electrochemical properties and can be used as an electrode material of a lithium battery and a super-capacitor.

Description

technical field [0001] The invention relates to the field of nanocomposite materials and battery electrode materials, in particular to a graphene-coated mesoporous carbon-based metal oxide and its preparation method and application. Background technique [0002] Lithium-ion batteries are widely used in people's daily life due to their high storage energy density, large capacity, no memory effect, high rated voltage, low self-discharge rate, light weight, long service life, high and low temperature adaptability, and environmental protection. In daily life, especially many digital devices use lithium-ion batteries as power sources. Some metal oxides can be used as lithium-ion battery materials due to their high theoretical capacity, such as Co 3 o 4 , NiO, Fe 3 o 4 , The theoretical specific capacity of ZnO is 700-1000mAh / g. However, metal oxides themselves have poor conductivity and low charge and discharge rates. At the same time, there will be a large volume deformati...

Claims

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Application Information

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IPC IPC(8): H01M4/38H01M4/48H01G11/36H01G11/46B82Y30/00B82Y40/00
CPCY02E60/13H01G11/46H01M4/483H01M4/523H01M4/625H01M4/628Y02E60/10
Inventor 岳文博
Owner BEIJING NORMAL UNIVERSITY
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