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Method for compounding graphene and metallic oxide/metallic compound and composite material thereof

A technology of metal compounds and oxides, which is applied in the field of synthesis and compounding of nanomaterials, to achieve the effects of good dispersion, lower impedance and uniform compounding

Active Publication Date: 2013-05-08
CHENGDU SCI & TECH DEV CENT CHINA ACAD OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the capacity and cycle performance of the material have been significantly improved, the preparation process still requires high-temperature calcination of the composite material to reduce the graphene oxidized during the synthesis process.

Method used

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  • Method for compounding graphene and metallic oxide/metallic compound and composite material thereof
  • Method for compounding graphene and metallic oxide/metallic compound and composite material thereof
  • Method for compounding graphene and metallic oxide/metallic compound and composite material thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0029] a. graphene oxide is dissolved in deionized water to make a pH value of 6.5 (to ensure the solubility of graphene in solution), and the concentration is a graphene oxide solution of 1 mg / mL;

[0030] b. Put 0.01g of manganese oxide nanowires into 20ml of graphene oxide aqueous solution with a concentration of 1mg / mL, mix the mixture ultrasonically for 2 hours (to ensure sufficient dispersion of manganese oxide in graphene aqueous solution) and put the mixed solution into Put into a hydrothermal kettle, react at 90° C. for 36 hours, filter with suction after the reaction, wash, then dry at 60° C. to obtain graphene and metal oxide / metal compound composite material.

[0031] In this embodiment, replacing deionized water with one or more mixtures of ethylene glycol and isopropanol can achieve the purpose of the invention.

[0032] In this embodiment, manganese oxide is replaced by manganese hydroxide, cobalt oxide, cobalt hydroxide, iron oxide, iron hydroxide, zinc oxide, ...

Embodiment 2

[0034] a. graphene oxide is dissolved in ethylene glycol to make a pH value of 6.5, and the concentration is a graphene oxide solution of 0.5 mg / mL (to ensure the solubility of graphene in the solution);

[0035] b. Put 0.005g of CoOOH nanoparticles into 20ml of graphene oxide aqueous solution with a concentration of 0.5mg / mL, mix the mixture ultrasonically for 1 hour (to ensure sufficient dispersion of CoOOH in the graphene aqueous solution), and then put the mixed solution into water In a hot kettle, react at 70°C for 32 hours, suction filter, wash after the reaction, and then dry at 55°C to obtain graphene and metal oxide / metal compound composites.

[0036] In this embodiment, replacing ethylene glycol with one or more mixtures of deionized water and isopropanol can achieve the purpose of the invention.

[0037] In this embodiment, manganese hydroxide is replaced by manganese oxide, cobalt oxide, cobalt hydroxide, iron oxide, iron hydroxide, zinc oxide, zinc hydroxide, titani...

Embodiment 3

[0039] a. graphene oxide is dissolved in isopropanol to make a pH value of 6 and a concentration of graphene oxide solution of 20mg / mL (to ensure the solubility of graphene in the solution);

[0040] b. Add 0.1g of cobalt oxide (Co 3 o 4 ) nanoparticles into 20ml concentration of 20mg / mL graphene oxide aqueous solution, the mixture was ultrasonically mixed for 3 hours (to ensure sufficient dispersion of cobalt oxide in the graphene aqueous solution) and then put the mixed solution into a hydrothermal kettle, React at 120°C for 40 hours, after the reaction, suction filter, wash, and then dry at 60°C to obtain graphene and metal oxide / metal compound composites.

[0041] In this embodiment, the purpose of the invention can be achieved by replacing isopropanol with one or more mixtures of ethylene glycol and deionized water.

[0042] In this embodiment, cobalt oxide is replaced by manganese hydroxide, manganese oxide, cobalt hydroxide, iron oxide, iron hydroxide, zinc oxide, zin...

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Abstract

The invention discloses a method for compounding graphene and a metallic oxide / metallic compound. The method comprises the following steps: a, dissolving graphene oxide in a dispersing agent, regulating the PH value of the solution to be 5-9, and preparing a graphene oxide solution; and b, adding the oxide / metallic compound into the graphene oxide solution, ultrasonically mixing, reacting at the temperature of 70-120 DEG C for 32-40 hours. According to the method for compounding graphene and the metallic oxide / metallic compound, a reducing agent is not used, the composite material is reduced by utilizing the reducing property of graphene oxide in a hydrothermal environment, and the final product forms the uniformly dispersed graphene and oxide / metallic compound composite material by utilizing the high water solubility of the graphene oxide; and moreover, according to the material, the cycle performance, rate capability and gram volume of the oxide which serves as an electrode of a lithium ion battery can be effectively improved, and the impendence is reduced.

Description

technical field [0001] The invention relates to the field of synthesis and compounding of nanometer materials, in particular to a method for preparing a composite material of graphene and metal oxide / metal compound. Background technique [0002] Graphene is a two-dimensional new material composed of a single layer of carbon atoms and has a sheet-like structure. The hexagonal Jingge plane film is composed of carbon atoms with sp2 hybrid orbitals. It is the basic material of other graphite materials. Since the material was discovered in 2004, it has received extensive attention from the world's scientific and engineering communities. Graphene is currently the thinnest and hardest material in the world, with extremely low light absorption (2-3%), high thermal conductivity (5300W / mk) and electron mobility (15000cm 2 / v.s), extremely low resistivity (10 -6 Ω / cm), and extremely high mechanical strength (100 times that of steel). Therefore, graphene has a wide range of applica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/48H01M4/58H01M4/62B82Y30/00
CPCY02E60/12Y02E60/10
Inventor 刘昊张义梅军朱泽华刘焕明黄家伟
Owner CHENGDU SCI & TECH DEV CENT CHINA ACAD OF ENG PHYSICS
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