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Flexible supercapacitor based on carbon-based composite electrode and preparation method

A technology for supercapacitors and composite electrodes, which is applied in the manufacture of hybrid/electric double-layer capacitors, capacitor manufacture, electrolytic capacitors, etc., can solve problems such as difficulty in implementation, and achieve improved work reliability, high ionic conductivity, and good flexibility. Effect

Inactive Publication Date: 2021-10-08
EAST CHINA NORMAL UNIVERSITY
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Problems solved by technology

[0003] At present, supercapacitors still face challenges in terms of flexibility and capacitance density. On the one hand, there is a bottleneck in increasing the specific surface area of ​​supercapacitors and increasing the charge storage density with a single material or method. It is still difficult to meet the requirements of various performance indicators such as storage capacity

Method used

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  • Flexible supercapacitor based on carbon-based composite electrode and preparation method
  • Flexible supercapacitor based on carbon-based composite electrode and preparation method
  • Flexible supercapacitor based on carbon-based composite electrode and preparation method

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Embodiment 1

[0038] refer to figure 1 , the flexible supercapacitor of this embodiment includes carbon fiber / conductive graphite / graphene / MnO 2 Composite electrode 1, PVA gel solid electrolyte 2 and flexible PDMS package 3. After both sides of the PVA gel solid electrolyte 2 are covered with the composite electrodes to form a sandwich structure, PDMS flexible packaging is performed, and electrodes are drawn out during the packaging process as charging and discharging ports.

[0039] The concrete preparation process of this embodiment:

[0040] (1) Put 2×5cm 2 The carbon cloth was ultrasonically cleaned with acetone, deionized water, and ethanol for 90 minutes, and dried at 90°C;

[0041] (2) Arrange the cleaned carbon in a sucrose solution of sucrose: deionized water = 1:5, dry at 90°C, and perform laser ablation at 50% laser power and engraving depth of 10.0;

[0042] (3) Dissolve graphene oxide and PI glue in polyimide acid-methylpyrrolidone at a ratio of 1:1 to form a 30ml solution, a...

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Abstract

The invention provides a flexible supercapacitor based on a carbon-based composite electrode and a preparation method, and belongs to the field of flexible supercapacitors. A flexible carbon fiber is used as a current collector of a supercapacitor, sucrose, graphene oxide and PI glue are used as carbon sources, a laser ablation method, a thermal reduction method and an electrochemical deposition method are adopted, and the carbon fiber / conductive graphite / graphene / MnO2 composite active electrode with a multi-stage nanostructure is prepared. The high specific surface area of the carbon fiber / conductive graphite / graphene composite electrode is combined with a pseudocapacitance effect of MnO2 on the surface of the electrode, so that the preparation of the high-capacitance flexible supercapacitor is realized. Finally, silica gel flexible packaging is combined, so that the flexible supercapacitor has good biocompatibility and good flexible bending performance, and the working reliability of the supercapacitor is improved.

Description

technical field [0001] The invention belongs to the field of flexible and wearable supercapacitors, and relates to a method for preparing a flexible supercapacitor based on a carbon-based composite electrode. Background technique [0002] In recent years, electronic devices are developing towards thinner, lighter and more flexible devices. One of the current challenges is flexible and thinner energy devices that match flexible electronic devices. With high power density and long cycle life, supercapacitors are widely used in the consumer electronics market and in uninterruptible power supplies, such as transportation for fast energy storage during braking. Researchers have begun to try to use different preparation methods to realize the flexibility of supercapacitors. Cui et al. (Kaempgen M., Chan C. K., Ma J., et al. Printable Thin Film Supercapacitors Using Single-Walled Carbon Nanotubes. Nano Lett 2009, 9(5), 1872-1876.) used the immersion of carbon nanotube dispersion ...

Claims

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Application Information

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IPC IPC(8): H01G11/26H01G11/32H01G11/34H01G11/36H01G11/46H01G11/56H01G11/74H01G11/78H01G11/84H01G11/86H01G13/00
CPCH01G11/36H01G11/32H01G11/34H01G11/46H01G11/56H01G11/78H01G11/74H01G11/86H01G11/84H01G13/003H01G11/26Y02E60/13
Inventor 王超伦金梦歌邹欣宇乔雨翀吴幸
Owner EAST CHINA NORMAL UNIVERSITY
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