Carbon-based composite electrode material and preparation method thereof, and application of the carbon-based composite electrode material to super capacitor

A composite electrode, carbon-based material technology, applied in electrolytic capacitors, capacitors, circuits, etc., can solve the problems of cumbersome process, easily damaged templates, and insufficient charge-discharge cycle stability of polymer electrode materials, so as to improve the active area. , The effect of good charge-discharge cycle stability and high capacitance capacity

Inactive Publication Date: 2011-10-19
THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to overcome the disadvantages of cumbersome process, easily damaged templates and insufficient cycle stability of polymer electrode materials when preparing electrode materials by the above-mentioned template method, the present invention provides a simple process, low cost, stable charge and discharge cycle Good carbon-based composite electrode materials and their applications in supercapacitors

Method used

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  • Carbon-based composite electrode material and preparation method thereof, and application of the carbon-based composite electrode material to super capacitor
  • Carbon-based composite electrode material and preparation method thereof, and application of the carbon-based composite electrode material to super capacitor
  • Carbon-based composite electrode material and preparation method thereof, and application of the carbon-based composite electrode material to super capacitor

Examples

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Embodiment 1

[0048] This example is used to illustrate the preparation method of the carbon-based composite electrode material of the present invention.

[0049] The concentration to 20mL is 1molL -1 HClO 4 Add aniline monomer (Sinopharm Group Chemical Reagent Co., Ltd., analytically pure) to the aqueous solution to obtain a concentration of 0.1molL -1 Aniline monomer solution.

[0050] The graphene dispersion is prepared through the following process: first, natural graphite is oxidized to graphene oxide by the Hummers method. The process is to mix 5g of flaky natural graphite (Sinopharm Chemical Reagent Co., Ltd.) and 2g of sodium nitrate (Sinopharm Chemical Reagent Co., Ltd.), and add 120mL of concentrated sulfuric acid (98wt%, Sinopharm Chemical Reagent Co., Ltd.) . Stir in an ice bath, and slowly add 15 g of potassium permanganate. After 2-3 hours of reaction, add 300 mL of deionized water to the reaction solution, raise the temperature to 100° C. and continue the reaction for 30 ...

Embodiment 2

[0053] This example is used to illustrate the preparation method of the composite electrode material of the present invention.

[0054] The concentration to 20mL is 1.5molL -1 HClO 4 Add aniline monomer (Sinopharm Group Chemical Reagent Co., Ltd., analytically pure) to the aqueous solution to obtain a concentration of 0.1molL -1 Aniline monomer solution.

[0055] At a temperature of 25 °C, commercial carbon paper (10 × 30 mm, 0.19 mm, Toray carbon paper, Japan Toray Co., Ltd., Toray carbon paper) was used as the working electrode, and a Pt sheet (15 × 30 mm, 0.2 mm) was used as the counter electrode. A mercury electrode is used as a reference electrode, and the above-mentioned aniline monomer solution is used as an electrolyte, and a constant current method is adopted, and the current density is 0.01mAcm -2 , energized for 2 hours, a layer of green polyaniline nanowire array (can be seen by scanning electron microscope) was deposited on the surface of the working electrode....

Embodiment 3

[0057] This example is used to illustrate the preparation method of the carbon-based composite electrode material of the present invention.

[0058] The concentration to 20mL is 1molL -1 HClO 4 Add aniline monomer (Sinopharm Group Chemical Reagent Co., Ltd., analytically pure) to the aqueous solution to make its concentration 0.05molL -1 . To which adding 9mL concentration is 1mg / mL graphene oxide dispersion solution (prepared according to the method described in Example 1), then adding oxidant ammonium persulfate, making its concentration 0.034molL -1 . The reaction was stirred for 24 hours at a temperature of -10°C. After the reaction, filter and separate the solid sample, and use a concentration of 0.1molL -1 HClO 4 The solution washed the sample three times (5 mL each time) to obtain a composite electrode material of polyaniline and graphene oxide deposited on the surface of graphene oxide with a layer of polyaniline nanowire arrays. It can be estimated from the ele...

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Abstract

The invention relates to a carbon-based composite electrode material and a preparation method thereof, and application of the carbon-based composite electrode material to a super capacitor. The electrode material contains a conductive polymer and a carbon-based material. The conductive polymer is attached to a surface of the carbon-based material in a manner of a nanowire array of a conductive polymer, wherein the arrangement of the nanowire array of the conductive polymer is in a good order; besides, a diameter of the nanowire of the nanowire array of the conductive polymer is 40 to 100 nm and a length of the nanowire is 100 to 1500 nm. The carbon-based composite electrode material provide in the invention has a large specific surface area, so that an active area of a conductive polymer is substantially improved and thus high capacitance can be obtained; besides, the carbon-based composite electrode material provide in the invention has a highly ordered nano structure, so that a transmission path of an electrolyte ion is reduced and an internal resistance of an electrode is also reduced; therefore, the ion in an electrode material can be diffused and transmitted conveniently, and thus high power density can be obtained.

Description

technical field [0001] The invention relates to a carbon-based composite electrode material, a preparation method thereof and an application in a supercapacitor. Background technique [0002] Supercapacitor, also known as electrochemical capacitor, is a new type of energy storage element with the advantages of high power density, high energy density, wide temperature range and long cycle life. According to different energy storage mechanisms, supercapacitors can be divided into electric double layer capacitors and pseudocapacitors. The electrode material of the electric double layer capacitor is mainly a carbon material with a high specific surface area, which relies on the charge separation at the interface between the electrode and the electrolyte to form an electric double layer to store charges. The electrode materials of pseudocapacitors include metal oxides and conductive polymers, relying on the fast and reversible redox reaction of electrode active materials to stor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/00H01G9/042
CPCY02E60/13
Inventor 王凯许晶晶魏志祥
Owner THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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