Functionalized graphene hydrogel/functionalized carbon cloth composite fabric, flexible all-solid-state supercapacitor integrated electrode and preparation method

A composite fabric and hydrogel technology, which is applied in the manufacture of hybrid capacitor electrodes, hybrid capacitor current collectors, and hybrid/electric double layer capacitors, can solve the problems of inability to fill the gaps and large pores of carbon cloth, and achieve high redox Effects of activity and charge storage capacity, improved capacitance, and improved cycling stability

Active Publication Date: 2019-03-12
HUNAN UNIV
View PDF5 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these 1D nanofibers and 2D graphene are still unable to fill the gaps and macropores in the carbon cloth
Therefore, it is still challenging to make

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Functionalized graphene hydrogel/functionalized carbon cloth composite fabric, flexible all-solid-state supercapacitor integrated electrode and preparation method
  • Functionalized graphene hydrogel/functionalized carbon cloth composite fabric, flexible all-solid-state supercapacitor integrated electrode and preparation method
  • Functionalized graphene hydrogel/functionalized carbon cloth composite fabric, flexible all-solid-state supercapacitor integrated electrode and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0041] Example 1

[0042] Step 1: Oxidation of carbon cloth: put 0.5g CC in 30mL concentrated HNO 3 : Concentrated H 2 SO 4 (1:2, v / v%) in the mixture, ice-bathed and stirred. Subsequently, 3g KMnO 4 Slowly added to the above mixture, heated to 35°C and continued to stir for 3h. Then, 100 mL of deionized water was added dropwise into the above mixture, and stirring was continued for 3 h. Finally, add H 2 o 2 The solution was allowed to stop bubbling and the solution became clear. Washing with deionized water and drying yielded oxidized CC (OCC).

[0043] Step 2: Preparation of FGH / FCC: FGH / FCC is prepared by a one-step hydrothermal method. First, graphene oxide (GO) prepared by Hummer’s method was added to PPD aqueous solution to obtain GO / PPD dispersion. Among them, the final concentration of GO was 2 mg / mL, and the mass ratio of GO to PPD was 1:5, that is, the PPD concentration was 10 mg / mL. Then the OCC was submerged in the GO / PPD dispersion and sonicated for 10 ...

Example Embodiment

[0059] Example 2

[0060] Embodiment 1 is the best preferred solution of the present invention, and the following Table 1 and Table 2 are the single factor optimization experiment part carried out in the process of obtaining the best preferred solution of Example 1. Except that the conditions of investigation are different from Example 1, other conditions are all the same as Example 1.

[0061] Table 1: Effect of reaction conditions on the electrochemical performance of Lig / PANI / FGH / FCC during the hydrothermal reaction

[0062]

[0063] Table 2. Influence of reaction conditions during in situ polymerization on the electrochemical performance of Lig / PANI / FGH / FCC

[0064]

[0065]

Example Embodiment

[0066] Example 3

[0067] Electrochemical performance comparison experiments of OCC, rOCC, rGO / rOCC, FGH / FCC, Lig / PANI / rOCC, Lig / PANI / rGO / rOCC and Lig / PANI / FGH / FCC:

[0068] The symmetric supercapacitor (SSC) assembled by FGH / FCC operates at a current density of 1mA cm -2 When the area capacitance is 816mF cm -2 , significantly higher than OCC, rOCC and rGO / rOCC without PPD doping. When the current density increases to 20mA cm -2 , the rate performance of FGH / FCC is as high as 78%. The higher electrochemical performance of FGH / FCC is mainly due to two reasons: (1) PPD functionalization and N-doping can provide a larger pseudocapacitance; (2) the introduction of FGH greatly increases the specific capacitance of the electrode. The surface area, the contact area between the electrolyte and the material increases, and the number of active sites increases. More importantly, when the loading of Lig / PANI in a single electrode is 2.5 mg cm -2 , the SSC assembled by Lig / PANI / FGH / ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Diameteraaaaaaaaaa
Area capacitanceaaaaaaaaaa
Conductivityaaaaaaaaaa
Login to view more

Abstract

The invention discloses a functionalized graphene hydrogel/functionalized carbon cloth composite fabric, a flexible all-solid-state supercapacitor integrated electrode and a preparation method. Functionalized graphene hydrogel is fixed in a functionalized carbon cloth frame through a one-step hydrothermal method, and then lignin/polyaniline composite hydrogel and the functionalized graphene hydrogel/functionalized carbon cloth composite fabric are prepared into the flexible all-solid-state supercapacitor integrated electrode by adopting an in-situ polymerization method. According to the method, the functionalized graphene hydrogel is used for filling gaps and macroscopic macropores in carbon cloth, and serves as a 3D conductive scaffold, so that the load of active substances in the electrode can be obviously increased, the interface resistance of the electrode is reduced, and the conductivity of the electrode is improved; and the prepared integrated electrode is assembled into a symmetric supercapacitor which shows excellent area capacitance, super-high energy density, high mechanical flexibility and cycling stability.

Description

technical field [0001] The invention relates to an integrated electrode for a supercapacitor, in particular to a flexible, large-area integrated fabric formed by anchoring a functionalized graphene hydrogel in a functionalized carbon cloth frame, and utilizing the functionalized graphene hydrogel / functional The invention discloses a flexible all-solid-state supercapacitor integrated electrode composed of in-situ loaded lignin / polyaniline hydrogel active material on a carbonized carbon cloth composite fabric, and also relates to a preparation method of the integrated electrode, which belongs to the technical field of energy storage. Background technique [0002] With the increasing demand for portable and wearable electronic devices, flexible supercapacitors have attracted much attention due to their excellent flexibility and deformability, high power density, fast charge-discharge speed, and long cycle life. Under the limited use area and space, the area capacitance and its ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H01G11/30H01G11/48H01G11/32H01G11/36H01G11/68H01G11/70H01G11/86
CPCH01G11/30H01G11/32H01G11/36H01G11/48H01G11/68H01G11/70H01G11/86Y02E60/13
Inventor 钟文斌吴丹
Owner HUNAN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap