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Li2C6O6 composite material and preparation method thereof

A composite material, graphene technology, applied in the direction of structural parts, electrical components, battery electrodes, etc., can solve the problems of low power density, inability to perform high current charge and discharge, short life, etc., to achieve high capacity, excellent conductivity and Excellent thermal stability and energy storage

Active Publication Date: 2013-12-18
OCEANS KING LIGHTING SCI&TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The oxocarbon lithium salt material has the advantages of high specific capacity, high energy density, and good thermal stability, but there are two problems in this material, one is that the power density is not high, and it cannot be charged and discharged with a large current; cycle, the capacity decays quickly, and the life is shorter than that of current commercial lithium-ion batteries

Method used

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  • Li2C6O6 composite material and preparation method thereof
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  • Li2C6O6 composite material and preparation method thereof

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preparation example Construction

[0022] Examples of the present invention also provide a simple process, high efficiency, easy to operate and control the above Li 2 C 6 o 6 Methods of preparation of composite materials. The Li 2 C 6 o 6 For the preparation method and process flow of composite materials, please refer to figure 1 , the method includes the following steps:

[0023] S01, prepare graphene suspension: obtain graphene, and prepare graphene suspension;

[0024] S02, the graphene suspension and Li 2 C 6 o 6 Solution mixing to prepare Li 2 C 6 o 6 Composite material: the graphene suspension prepared in step S01 was mixed with Li 2 C 6 o 6 After the solutions were mixed, they were vacuum-dried to obtain the Li 2 C 6 o 6 composite materials, in which graphene accounts for the Li 2 C 6 o 6 30% to 60% of the total mass of composite materials.

[0025] Specifically, the preparation method of the graphene suspension in the above step S01 is preferably: dispersing the graphene in the aqu...

Embodiment 1

[0047] A kind of Li 2 C 6 o 6 Composite material and preparation method thereof, the specific steps of its preparation method are as follows:

[0048] S11. Provide graphite: purity 99.5%.

[0049] S12. Preparation of graphite oxide: graphite oxide was prepared by the improved Hummers method (extracted from JACS, 1958, 80, 1339). The specific steps are adding 20g of 50 mesh graphite powder, 10g of potassium persulfate and 10g of phosphorus pentoxide into concentrated sulfuric acid at 80°C, stirring evenly, cooling for more than 6h, washing until neutral, and drying. Add the dried sample to 230mL of concentrated sulfuric acid at 0°C, then add 60g of potassium permanganate, keep the temperature of the mixture below 20°C, then keep it in an oil bath at 35°C for 2h, then slowly add 920mL of deionized water . After 15 minutes, add 2.8L of deionized water (which contains 50mL of 30% hydrogen peroxide), and then the color of the mixture turns bright yellow. Suction filtration whi...

Embodiment 2

[0053] A kind of Li 2 C 6 o 6 Composite material and preparation method thereof, the specific steps of its preparation method are as follows:

[0054] S21. Provide graphite: the purity is 99.5%.

[0055] S22. Preparation of graphite oxide: Graphite oxide was prepared by the improved Hummers method (from JACS, 1958, 80, 1339); by the improved Hummers method (Hummers W S, Offeman R E.[J].J Am Chem Soc,1958, 80:133921339) for the preparation of graphite oxide. The specific steps are adding 20g of 50 mesh graphite powder, 10g of potassium persulfate and 10g of phosphorus pentoxide into concentrated sulfuric acid at 80°C, stirring evenly, cooling for more than 6h, washing until neutral, and drying. Add the dried sample to 230mL of concentrated sulfuric acid at 0°C, then add 60g of potassium permanganate, keep the temperature of the mixture below 20°C, then keep it in an oil bath at 35°C for 2h, then slowly add 920mL of deionized water . After 15 minutes, add 2.8L of deionized...

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Abstract

The invention discloses a Li2C6O6 composite material and its preparation method and use as an anode material. The Li2C6O6 composite material comprises graphene and Li2C6O6, wherein the Li2C6O6 composite material comprises 30-60wt% of graphene. The preparation method comprises the following steps of preparing a graphene suspension liquid and mixing the graphene suspension liquid and a Li2C6O6 solution. Through compounding of graphene and Li2C6O6, the Li2C6O6 composite material has excellent electrical conductivity and heat stability. When the Li2C6O6 composite material is used as an accumulator anode material, the accumulator anode can carry out charging and discharging at a large current and a capacity is stabe in a charging-discharging cycle. The preparation method has simple processes and easily controlled production conditions, effectively reduces a production cost, improves production efficiency and is suitable for industrial production.

Description

technical field [0001] The invention belongs to the technical field of carbon materials, in particular to a Li 2 C 6 o 6 Composite materials and methods for their preparation. Background technique [0002] Graphene is a two-dimensional carbon atom crystal discovered by Andre K. Geim of the University of Manchester in 2004, and won the Nobel Prize in Physics in 2010, which once again sparked an upsurge in carbon material research. Due to its unique structure and photoelectric properties, it has become a research hotspot in the fields of carbon materials, nanotechnology, condensed matter physics and functional materials, attracting many scientific and technological workers. Single-layer graphene has excellent electrical and thermal conductivity and low thermal expansion coefficient, and its theoretical specific surface area is as high as 2630m 2 / g, can be used in effect transistors, electrode materials, composite materials, liquid crystal display materials, sensors, etc. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/62H01M4/485H01M10/0525
CPCY02E60/10
Inventor 周明杰钟玲珑王要兵
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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