CN104609408A - Method for preparing nano-graphite with electric arc method - Google Patents
Method for preparing nano-graphite with electric arc method Download PDFInfo
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- CN104609408A CN104609408A CN201510027984.7A CN201510027984A CN104609408A CN 104609408 A CN104609408 A CN 104609408A CN 201510027984 A CN201510027984 A CN 201510027984A CN 104609408 A CN104609408 A CN 104609408A
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Abstract
The invention provides a method for preparing nano-graphite with an electric arc method. Graphite rods are taken as two poles of an electric arc furnace, electric arc discharge is performed under the high-current and helium atmosphere, a graphite rod of the positive pole is continuously consumed in the electric arc discharge process, and graphite can be obtained in an inner wall area of a reaction chamber. The graphite prepared with the method has a smaller size, the migration path of lithium ions is short when the graphite is used as a lithium ion battery anode material, and accordingly, the graphite has excellent high-rate charge-discharge performance.
Description
Technical field
The invention belongs to carbon nanomaterial fabricating technology field, particularly a kind of arc process prepares the method for nano-graphene.
Background technology
Nano-graphene is a kind of carbon nanomaterial with two-dimension plane structure found recently, its special monoatomic layer structure makes it have the physicochemical property of many uniquenesses, about the basic and applied research of Graphene has become current one of forward position and hot subject.
Carbon material be material more general and special on a kind of earth it can form the larger diamond of hardness, also softer graphite can be formed, over nearly 20 years, carbon nanomaterial is the Disciplinary Frontiers of scientific and technical innovation always, the soccerballene found for 1985 and the carbon nanotube found for 1991 all cause huge repercussion, risen research boom, the Geim group of Manchester university in 2004 obtains the New Two Dimensional atomic crystal-Graphene of individual layer or thin layer first by mechanically peel method.Carbon material family has been enriched in the discovery of Graphene, and define the diamond of Graphene to three-dimensional from the CNTs of the soccerballene of zero dimension, one dimension, two dimension and the integral framework of graphite, Graphene is with sp by carbon atom
2the monoatomic layer that hydridization connects is formed, and its basic structural unit is benzene six-ring the most stable in organic materials, and its theoretic throat is only 0.35nm, is the thinnest two-dimensional material found at present.
Nano-graphene forms the elementary cell of other graphite material, and warpage can become the soccerballene of zero dimension, curl into the CNTs of one dimension, or be stacked to three-dimensional graphite, this special construction has contained abundant and peculiar physical phenomenon.The intensity of nano-graphene is that intensity is the highest in test material, and reaching 130GPa, is more than 200 times of steel; Its carrier mobility is known at present 2 times with the indium antimonide materials of most high mobility, and exceed 50 times of commercial silicon chip mobility, the thermal conductivity of nano-graphene is adamantine 3 times; In addition, nano-graphene also has the corresponding and room-temperature ferromagnetic of room-temperature quantum Hall etc. special property.These excellent specific properties of nano-graphene cause " carbon " research boom of scientific and technological circle's new round.
The Graphene size prepared of existing employing arc process is comparatively large, during as lithium ion battery negative material, lithium from migration path long, charge-discharge performance is bad.
Summary of the invention
The present invention proposes a kind of method that arc process prepares nano-graphene, solve existing Graphene as the bad problem of charge-discharge performance during lithium ion battery negative material.
A kind of arc process prepares the method for nano-graphene, the negative and positive the two poles of the earth of preparing nano-graphene using graphite rod as arc process, arc-over is carried out under high electric current and helium atmosphere, in arc discharge process, continuous consumable anode graphite rod, can obtain high-purity 1-2 layer nano-graphene in reaction chamber wall region.
Wherein, preferably, described graphite rod is square spectrum Graphite Electrodes.
Wherein, preferably, described square spectrum Graphite Electrodes is of a size of 35mm*35mm*420mm.
Wherein, preferably, two described square spectrum Graphite Electrodess are just to placement, and spacing is 1 ~ 3mm.
Wherein, preferably, discharging current during described arc-over is 1500 ~ 3000A.
Wherein, preferably, the pressure of described helium atmosphere is-5 ~-10*10
-2mPa.
Wherein, preferably, arc temperature 2500-3000 DEG C in vacuum.
Wherein, preferably, the step by obtaining nano-graphene calcination in atmosphere is also comprised, in order to remove decolorizing carbon a small amount of in nano-graphene, calcination temperature 400-500 DEG C.
Beneficial effect of the present invention:
The nano-graphene size adopting method of the present invention to prepare is less, and during as lithium ion battery negative material, the migration path of lithium ion is short, thus has outstanding high-rate charge-discharge capability.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, put after not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is Graphene electron scanning micrograph (enlargement ratio 200,000 times);
Fig. 2 is the electron micrograph that Graphene thickness in monolayer is measured.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art put obtained every other embodiment after not making creative work, all belong to the scope of protection of the invention.
A kind of arc process prepares the method for nano-graphene, the negative and positive the two poles of the earth of preparing nano-graphene using graphite rod as arc process, arc-over is carried out under high electric current and helium atmosphere, in arc discharge process, continuous consumable anode graphite rod, can obtain high-purity 1-2 layer nano-graphene in reaction chamber wall region.
Embodiment 1
A kind of arc process prepares the method for nano-graphene, the negative and positive the two poles of the earth of preparing nano-graphene using graphite rod as arc process, arc-over is carried out under high electric current and helium atmosphere, in arc discharge process, continuous consumable anode graphite rod, can obtain high-purity 1-2 layer nano-graphene in reaction chamber wall region.
Wherein, graphite rod is square spectroscopically pure electrode ink, and square spectroscopically pure electrode ink is of a size of 35mm*35mm*420mm.Two described square spectroscopically pure electrode inks are just to placement, and spacing is 2mm.
Wherein, discharging current during arc-over is 2200A, arc temperature 2500 DEG C, and the pressure of helium atmosphere is-6.5*10
-2mPa.
Wherein, also comprise the step by obtaining Graphene calcination in atmosphere, in order to remove decolorizing carbon a small amount of in Graphene, calcination temperature 450 DEG C.
Embodiment 2
A kind of arc process prepares the method for nano-graphene, the negative and positive the two poles of the earth of preparing nano-graphene using graphite rod as arc process, arc-over is carried out under high electric current and helium atmosphere, in arc discharge process, continuous consumable anode graphite rod, can obtain high-purity 1-2 layer nano-graphene in reaction chamber wall region.
Wherein, graphite rod is square spectroscopically pure electrode ink, and square spectroscopically pure electrode ink is of a size of 35mm*35mm*420mm.Two described square spectroscopically pure electrode inks are just to placement, and spacing is 1mm.
Wherein, discharging current during arc-over is 1500A, arc temperature 3000 DEG C, and the pressure of helium atmosphere is-5*10
-2mPa.
Wherein, also comprise the step by obtaining Graphene calcination in atmosphere, in order to remove decolorizing carbon a small amount of in Graphene, calcination temperature 400 DEG C.
Embodiment 3
A kind of arc process prepares the method for nano-graphene, the negative and positive the two poles of the earth of preparing nano-graphene using graphite rod as arc process, arc-over is carried out under high electric current and helium atmosphere, in arc discharge process, continuous consumable anode graphite rod, can obtain high-purity 1-2 layer nano-graphene in reaction chamber wall region.
Wherein, graphite rod is square spectroscopically pure electrode ink, and square spectroscopically pure electrode ink is of a size of 35mm*35mm*420mm.Two described square spectroscopically pure electrode inks are just to placement, and spacing is 3mm.
Wherein, discharging current during arc-over is 3000A, arc temperature 2800 DEG C, and the pressure of helium atmosphere is-10*10
-2mPa.
Wherein, also comprise the step by obtaining Graphene calcination in atmosphere, in order to remove decolorizing carbon a small amount of in Graphene, calcination temperature 500 DEG C.
The obtained Graphene electron micrograph of above-described embodiment as depicted in figs. 1 and 2, wherein, size: 100-200nm, nitrogen content: 1%, specific surface area: 75-160 ㎡/g, electric conductivity: 1023s/m-1500s/m, aperture: 10nm.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. an arc process prepares the method for nano-graphene, it is characterized in that the negative and positive the two poles of the earth of preparing nano-graphene using graphite rod as arc process, arc-over is carried out under high electric current and helium atmosphere, in arc discharge process, continuous consumable anode graphite rod, can obtain high-purity 1-2 layer nano-graphene in reaction chamber wall region.
2. a kind of arc process according to claim 1 prepares the method for nano-graphene, it is characterized in that: described graphite rod is square spectrum Graphite Electrodes.
3. a kind of arc process according to claim 2 prepares the method for nano-graphene, it is characterized in that: described square spectrum Graphite Electrodes is of a size of 35mm*35mm*420mm.
4. a kind of arc process according to claim 2 prepares the method for nano-graphene, it is characterized in that: two described square spectrum Graphite Electrodess are just to placement, and spacing is 1 ~ 3mm.
5. a kind of arc process according to claim 1 prepares the method for nano-graphene, it is characterized in that: discharging current during described arc-over is 1500 ~ 3000A.
6. a kind of arc process according to claim 1 prepares the method for nano-graphene, it is characterized in that: the pressure of described helium atmosphere is-5 ~-10*10
-2mPa.
7. a kind of arc process according to claim 1 prepares the method for nano-graphene, it is characterized in that: arc temperature 2500-3000 DEG C under helium atmosphere.
8. a kind of arc process according to claim 1 prepares the method for nano-graphene, it is characterized in that: also comprise the step by obtaining nano-graphene calcination in atmosphere, in order to remove decolorizing carbon a small amount of in nano-graphene, and calcination temperature 400-500 DEG C.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105399423A (en) * | 2015-11-30 | 2016-03-16 | 太原理工大学 | Method for preparing nanopore graphene filter film through arc discharge method |
| CN106587021A (en) * | 2016-12-21 | 2017-04-26 | 东莞市悉达纳米科技有限公司 | Method for producing graphene through vacuum photoelectric reaction |
| CN107117602A (en) * | 2017-06-15 | 2017-09-01 | 成都新柯力化工科技有限公司 | A kind of method that continuous stripping of arc plasma prepares graphene |
| CN107473210A (en) * | 2017-09-30 | 2017-12-15 | 向新多 | A kind of method that vacuum energy prepares cavernous body graphene |
| CN107840323A (en) * | 2017-11-23 | 2018-03-27 | 安徽百特新材料科技有限公司 | A kind of method that graphene is prepared using electric arc graphite rod |
| CN108238598A (en) * | 2018-04-20 | 2018-07-03 | 上海地霸电子科技有限公司 | A kind of mechanical device of continuous production graphene |
| CN110526237A (en) * | 2019-09-03 | 2019-12-03 | 北京化工大学 | It is a kind of to prepare noble metal/graphene composite nano material device and method |
| CN111892040A (en) * | 2020-08-24 | 2020-11-06 | 江苏清大际光新材料有限公司 | Method for preparing graphene by arc process |
| CN112607731A (en) * | 2020-12-24 | 2021-04-06 | 广东工业大学 | Device and method for preparing graphene powder |
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| CN101717083A (en) * | 2009-12-29 | 2010-06-02 | 北京大学 | Graphene and preparation method thereof |
| CN102153076A (en) * | 2011-05-04 | 2011-08-17 | 上海大学 | Method for preparing graphene with high crystallinity |
| KR20140092642A (en) * | 2013-01-16 | 2014-07-24 | 한국과학기술연구원 | Method of preparing high quality graphene using acr discharge and high quality graphene using the same |
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Patent Citations (3)
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| CN101717083A (en) * | 2009-12-29 | 2010-06-02 | 北京大学 | Graphene and preparation method thereof |
| CN102153076A (en) * | 2011-05-04 | 2011-08-17 | 上海大学 | Method for preparing graphene with high crystallinity |
| KR20140092642A (en) * | 2013-01-16 | 2014-07-24 | 한국과학기술연구원 | Method of preparing high quality graphene using acr discharge and high quality graphene using the same |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105399423A (en) * | 2015-11-30 | 2016-03-16 | 太原理工大学 | Method for preparing nanopore graphene filter film through arc discharge method |
| CN106587021A (en) * | 2016-12-21 | 2017-04-26 | 东莞市悉达纳米科技有限公司 | Method for producing graphene through vacuum photoelectric reaction |
| CN106587021B (en) * | 2016-12-21 | 2019-01-25 | 东莞市悉达纳米科技有限公司 | A method of graphene is produced using vacuum photovoltaic reaction |
| CN107117602A (en) * | 2017-06-15 | 2017-09-01 | 成都新柯力化工科技有限公司 | A kind of method that continuous stripping of arc plasma prepares graphene |
| CN107473210A (en) * | 2017-09-30 | 2017-12-15 | 向新多 | A kind of method that vacuum energy prepares cavernous body graphene |
| CN107840323A (en) * | 2017-11-23 | 2018-03-27 | 安徽百特新材料科技有限公司 | A kind of method that graphene is prepared using electric arc graphite rod |
| CN108238598A (en) * | 2018-04-20 | 2018-07-03 | 上海地霸电子科技有限公司 | A kind of mechanical device of continuous production graphene |
| CN110526237A (en) * | 2019-09-03 | 2019-12-03 | 北京化工大学 | It is a kind of to prepare noble metal/graphene composite nano material device and method |
| CN110526237B (en) * | 2019-09-03 | 2023-08-29 | 北京化工大学 | Device and method for preparing noble metal/graphene composite nano material |
| CN111892040A (en) * | 2020-08-24 | 2020-11-06 | 江苏清大际光新材料有限公司 | Method for preparing graphene by arc process |
| CN112607731A (en) * | 2020-12-24 | 2021-04-06 | 广东工业大学 | Device and method for preparing graphene powder |
| CN112607731B (en) * | 2020-12-24 | 2021-08-10 | 广东工业大学 | Device and method for preparing graphene powder |
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