Graphene and its production method, application and battery

A production method and graphene technology, applied in the field of graphene, can solve problems such as pollution mitigation, high content of graphene metal impurities, and large amount of sewage, so as to reduce manganese content, save washing water consumption, reduce sewage treatment volume and protect the environment pollution effect

Active Publication Date: 2020-06-09
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 and its production method, application 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 present invention provides a kind of graphene and production method thereof, use and battery, relate to graphene technical field, the production method of this graphene comprises the following steps: A) after the oxidation reaction of graphite with concentrated sulfuric acid and potassium permanganate, Carry out solid-liquid separation to recover concentrated sulfuric acid, and obtain the first-level graphene oxide solid; B) the first-level graphene oxide solid is removed by hydrogen peroxide and the second-level graphene oxide solid is obtained after solid-liquid separation, and then washed with hydrochloric acid and then water Washing to obtain refined graphene oxide, and the refined graphene oxide is reduced to obtain graphene. Utilizing this production method can alleviate the high metal impurity content of graphene obtained by the existing graphene production process, which is not suitable for lithium-ion battery materials and the amount of sewage caused by purification treatment is large, which is likely to cause technical problems such as pollution mitigation, so as to achieve the reduction of graphene. purpose of metal content.

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 Patents(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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