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Graphene, production method and use thereof and battery

A production method and graphene technology, applied in the field of graphene, can solve the problems of alleviating pollution, high metal impurity content in graphene, large amount of sewage, etc., so as to reduce manganese content, save washing water consumption, reduce sewage treatment amount and environment. The effect of pollution

Active Publication Date: 2018-09-18
SHANDONG YUHUANG NEW ENERGY TECH
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Problems solved by technology

[0004] The purpose of the present invention is to provide a kind of production method of graphene, to alleviate the graphene metal impurity content that utilizes existing graphene production technology to obtain is high, is not suitable for lithium-ion battery material and the sewage amount that purification treatment causes is big, easily causes Mitigate technical issues such as pollution

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  • Graphene, production method and use thereof and battery

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Embodiment 1

[0047] Present embodiment is a kind of production method of graphene, and its production process flow is as follows figure 1 As shown, specifically, the following steps are included:

[0048] A) Add 1kg of graphite powder into the double-layer reaction kettle, then add 40L of concentrated sulfuric acid, set the circulating water to 0°C, then slowly add 4kg of potassium permanganate, and perform the low-temperature intercalation reaction for 1 hour; set the circulating water temperature to 40°C, medium temperature Oxidation reaction for 1 hour; set the circulating water temperature to 70°C, and high temperature reaction for 1 hour;

[0049] B) After the reaction is completed, the material is transported to the plate and frame filter press for solid-liquid separation, the waste sulfuric acid is recovered and purified, and continues to be used in the next oxidation production. The first-grade graphene oxide obtained by filtration is placed in a dispersion tank, and 100L of pure w...

Embodiment 2

[0054] The present embodiment is a kind of production method of graphene, comprises the following steps:

[0055] A) Put 2kg of graphite powder into the double-layer reaction kettle, then add 60L of concentrated sulfuric acid, set the circulating water to 0°C, then slowly add 5kg of potassium permanganate, and perform low-temperature intercalation reaction for 1 hour; set the circulating water temperature to 40°C, medium temperature Oxidation reaction for 1 hour; set the circulating water temperature to 70°C, and high temperature reaction for 1 hour;

[0056] B) After the reaction is completed, the material is transported to a flat centrifuge for solid-liquid separation, the waste sulfuric acid is recovered and purified, and continued to be used in the next oxidation production. The first-grade graphene oxide obtained by filtration is placed in a dispersion tank, and 50L of pure water is added, and stirred Until the dispersion is uniform, add hydrogen peroxide to remove impuri...

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Abstract

The invention provides graphene, a production method and use thereof and a battery, relating to the technical field of graphene. The production method comprises the following steps: (A) after graphitegenerates oxidation reaction with concentrated sulfuric acid and potassium permanganate, carrying out solid-liquid separation, so as to recycle concentrated sulfuric acid and obtain first-grade graphene oxide solids; and (B) removing impurities from first-grade graphene oxide solids by virtue of hydrogen peroxide, carrying out solid-liquid separation so as to obtain second-grade graphene oxide solids, sequentially washing with hydrochloric acid and water so as to obtain refined graphene oxide, and carrying out reduction on refined graphene oxide, so as to obtain graphene. The production method can be used for relieving the technical problems that graphene produced by virtue of an existing graphene production process is high in content and is not applicable to lithium ion battery materials, the amount of sewage produced during the purification is large, and environmental pollution is easily caused, and the purpose of reducing the content of graphene is achieved.

Description

technical field [0001] The invention relates to the technical field of graphene, in particular to a graphene and its production method, application and battery. Background technique [0002] Graphene is a carbon atom with sp 2 The single-layer planar film composed of hexagonal hybrid orbitals arranged in a honeycomb lattice is a two-dimensional material with a thickness of only one carbon atom. tubes and three-dimensional graphite) as the basic unit. Graphene has excellent physical and chemical properties such as large specific surface area, high electrical conductivity and high thermal conductivity, and can be widely used in fields such as energy storage, composite materials and new catalysts. [0003] The common preparation methods of graphene include mechanical exfoliation method, redox method, SiC epitaxial growth method and chemical vapor deposition method. At present, the relatively mature method for large-scale production of high-quality graphene is redox method, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/184H01M4/583H01M4/62
CPCC01B32/184C01B2204/30H01M4/583H01M4/625Y02E60/10
Inventor 张晓玉肖双王超武敖丽丽赵成龙王瑛
Owner SHANDONG YUHUANG NEW ENERGY TECH
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