Method for preparing graphite alkenyl nanometer materials by electron beam irradiation method

An electron beam irradiation, nanomaterial technology, applied in nanotechnology, nanotechnology, nanostructure manufacturing, etc., can solve the problems of low process efficiency, environmental protection, long time pyrolysis reduction, and highly toxic hydrazine hydrate, and achieve superior performance. , The effect of short preparation period and stable cycle performance

Inactive Publication Date: 2009-10-21
SHANGHAI UNIV
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Problems solved by technology

Many people use hydrazine hydrate aqueous solution reduction or pyrolytic reduction to prepare graphene nanomaterials. However, hydrazine hydrate is highly toxic, the reduction time is long (24 hours), the process efficiency is low, and there are environmental problems.
Pyrolytic reduction usually takes a long time and is inefficient

Method used

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  • Method for preparing graphite alkenyl nanometer materials by electron beam irradiation method
  • Method for preparing graphite alkenyl nanometer materials by electron beam irradiation method
  • Method for preparing graphite alkenyl nanometer materials by electron beam irradiation method

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Embodiment 1

[0021] Embodiment one: at first, potassium persulfate (K 2 S 2 o 8 ) 2.5g, phosphorus pentoxide (P 2 o 5 ) 2.5g, dissolved in 12ml of concentrated sulfuric acid, heated to 80°C; then 3g of natural graphite as the above solution, kept at 80°C for 4.5 hours; cooled to room temperature, diluted with 500ml of deionized water, and left to stand overnight; filtered, with Float with 0.2mm filter to remove residual acid; dry in a vacuum oven at 60°C; dissolve the above product in 120ml of concentrated sulfuric acid, slowly add 15g of potassium permanganate into the solution in an ice bath; stir at a constant temperature of 35°C for 2 hours, then Slowly dilute with 250nl water, let it stand for 2 hours; add 700ml water to dilute, 20mlH 2 o 2 (30%) was added to the above solution; filtered and then washed with 1 L of 1:10 HCl solution; dissolved in a small amount of water or ethanol, ultrasonicated for 20-30 minutes, washed, filtered, and separated to obtain a precipitate for use; ...

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Abstract

The invention relates to a method for preparing graphite alkenyl nanometer materials by an electron beam irradiation method. The method comprises the following steps: firstly, oxidizing natural graphite to obtain oxidized graphite; secondly, realizing the stripping between layers of the oxidized graphite by ultrasonic sound at the state of solution; and finally reducing the oxidized graphite through certain dosage of electron beam irradiation, and obtaining the graphite alkenyl nanometer materials. The method has simple preparation process, short preparation period and high yield, can be operated at normal temperature, does not add any catalyst and chemical initiator, and can be applied on a large scale.

Description

technical field [0001] The invention relates to a preparation method of a graphene-based nanometer material. In particular, the invention relates to a method for preparing quasi-two-dimensional graphene-based nanomaterials by electron beam irradiation, which belongs to the technical field of electrochemistry and material synthesis. Background technique [0002] Lithium-ion secondary batteries have the advantages of high specific energy, high operating voltage and long life, and have been widely used in portable appliances such as mobile phones and notebook computers. With the continuous development of electric vehicles and advanced electronic equipment, power supplies with higher storage capacity and cycle life are required. Commercially available highly graphitized carbon anode materials exhibit relatively low lithium storage capacity (<372mAh / g, LiC 6 ), are increasingly unable to meet the requirements of technological development, and finding new carbon anode materia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02B82B3/00
Inventor 赵兵潘登余王松蒋永焦正张海娇陶海华庄华张国华
Owner SHANGHAI UNIV
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