Fluoro graphene oxide electrode and preparation method thereof

A fluorinated oxygen and fossil technology, applied in the field of electrochemical energy, can solve the problems of lower specific surface area, lower performance of supercapacitors and lithium-ion batteries, lower specific capacity, etc., achieve simple process technology, save coating process and parameters controllable effect

Active Publication Date: 2012-07-25
OCEANS KING LIGHTING SCI&TECH CO LTD +1
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0003] However, due to the fact that graphene materials and their derivatives are prone to agglomeration, the specific surface area is reduced, so that when it is used as a supercapacitor electrode material, the specific capacity is reduced, and ultimately the performance of the resulting supercapacitor and lithium-ion battery the reduction,

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  • Fluoro graphene oxide electrode and preparation method thereof
  • Fluoro graphene oxide electrode and preparation method thereof
  • Fluoro graphene oxide electrode and preparation method thereof

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preparation example Construction

[0020] The preparation process of the above-mentioned fluorinated graphene oxide electrode is as follows:

[0021] Graphite → graphite oxide → graphene oxide → graphene oxide electrode → fluorinated graphene oxide electrode → passivated fluorinated graphene oxide electrode.

[0022] like figure 1 As shown, the preparation process steps of the fluorinated graphene oxide electrode are as follows:

[0023] Step 1, preparation of graphite oxide: utilize graphite flakes, such as natural flake graphite with a purity of 99.5%, to prepare graphite oxide by the Hummers method (extracted from JACS, 1958, 80, 1339);

[0024] Step 2, preparation of graphene oxide: adding the prepared graphite oxide into water for ultrasonic dispersion to form a graphene oxide solution uniformly dispersed in a single layer, filtering and drying to obtain graphene oxide;

[0025] Step 3, preparation of graphene oxide electrode: Add graphene oxide to a container filled with water or NMP (N-methylpyrrolidon...

Embodiment 1

[0040] The preparation technological process of fluorinated graphene oxide electrode among the present invention is as follows:

[0041] Graphite → Graphene Oxide → Graphene Oxide Electrode → Fluorinated Graphene Oxide Electrode

[0042] (1) Graphite: purity 99.5%;

[0043] (2) Graphene oxide: Utilize graphite with a purity of 99.5%, to obtain graphene oxide through the improved Hummers method (extracted from JACS, 1958, 80, 1339);

[0044] (3) Ultrasonic disperse the prepared graphene oxide into water, place a current collector aluminum foil at the bottom of the container, stand still and deposit for 12 hours, take out the pole piece, dry, and obtain a graphene oxide electrode;

[0045] (4) fluorinated graphene oxide electrode: the graphene oxide electrode obtained in (3) is passed through with F2 React to obtain a fluorinated graphene oxide electrode; put the dried graphene oxide electrode into the reactor and pass through dry nitrogen for 0.5h, then pass through fluorine g...

Embodiment 2

[0048] The preparation technological process of fluorinated graphene oxide electrode among the present invention is as follows:

[0049] Graphite → Graphene Oxide → Graphene Oxide Electrode → Fluorinated Graphene Oxide Electrode

[0050] (1) Graphite: purity 99.5%;

[0051] (2) Graphene oxide: with embodiment 1;

[0052] (3) Graphene oxide electrode: ultrasonically disperse the prepared graphene oxide into water, place a current collector aluminum foil at the bottom of the container, stand still and deposit for 48 hours, take out the pole piece, and dry;

[0053] (4) Fluorinated graphene oxide electrode: put the dried graphene oxide electrode into the reactor and pass through dry nitrogen gas for 0.5h, then pass through fluorine gas and react with graphene oxide at 20°C for 24h, then you can Obtain fluorinated graphene oxide; continue to feed the mixed gas of fluorine and nitrogen into the reactor, and in the whole reactor, fluorine accounts for 5% (volume ratio) of the mixe...

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Abstract

The invention discloses a fluoro graphene oxide electrode and a preparation method thereof, belonging to the field of electrochemical energy sources. The preparation method of the fluoro graphene oxide electrode comprises the following steps of: adding graphene oxide to a container, stirring, standing, depositing, then taking out metal concentrates concentrating the graphene oxide to dry to prepare a graphene oxide electrode; and adding the graphene oxide electrode into a reactor, and following charging mixed gas of fluorine and nitrogen into the reactor to carry out a substitution reaction to manufacture the fluoro graphene oxide electrode. The preparation method of the fluoro graphene oxide electrode, disclosed by the invention, has the advantages of simple technical skill, controllable parameters, low implementation cost and wide application; in addition, a common coating process at the present stage is saved, fluorination is implemented in an electrode plate manufacturing process once, and multiple complex flows in a material fluorination process are saved.

Description

technical field [0001] The invention relates to the field of electrochemical energy, in particular to a fluorinated graphene oxide electrode and a preparation method thereof. Background technique [0002] Andre K. Geim (Andre K.Geim) of the University of Manchester in the United Kingdom prepared graphene materials in 2004, and it has received widespread attention due to its unique structure and photoelectric properties. Single-layer graphite is considered an ideal material due to its large specific surface area, excellent electrical and thermal conductivity, and low thermal expansion coefficient. Such as: 1, high strength, Young's molar weight, (1,100GPa), breaking strength: (125GPa); 2, high thermal conductivity, (5,000W / mK); 3, high electrical conductivity, carrier transport rate, ( 200,000cm 2 / V*s); 4, high specific surface area, (theoretical calculation value: 2,630m 2 / g). In particular, its high conductivity, large specific surface properties and its two-dimension...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/1393H01M4/133H01G9/042
CPCY02E60/122Y02E60/10
Inventor 周明杰刘大喜潘军王要兵
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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