Electrode with flexible self-supporting structure, preparation method and application thereof

A self-supporting structure and electrode technology, applied in the field of electrochemical energy storage, can solve the problems of complex process, low performance, high cost, etc., and achieve the effects of high area specific capacitance, high conductivity, and high flexibility

Active Publication Date: 2019-04-09
ANHUI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This approach, although simple, is not very performant
[0005] Nguyen Van Chuc (Journal of Materials Science&Technology 31(2015) 479–483) and others proposed to prepare graphene-carbon nanotube hybrid films by chemical vapor deposition, which is costly and complicated; Li Wei et al. ( Journal of Solid State Chemistry 224 (2015) 45–51) proposed a method for preparing graphene paper in a high temperature environment, the process is complicated and the cost is high

Method used

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  • Electrode with flexible self-supporting structure, preparation method and application thereof
  • Electrode with flexible self-supporting structure, preparation method and application thereof
  • Electrode with flexible self-supporting structure, preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0041] A method for preparing an electrode with a flexible self-supporting structure, specifically comprising the following steps:

[0042] 1) Using a high-purity titanium sheet as the substrate, sand the titanium sheet substrate with sandpaper to remove oil stains and impurities on the surface, then ultrasonically clean it with acetone, ethanol, and deionized water for 15 minutes, and then dry it;

[0043] 2) Take two titanium substrates with a thickness of 0.20mm and an area of ​​15mm×20mm, treat them with ozone for 30 minutes, and then place them flat on a 3.00ml container with a concentration of 0.20mg·ml -1 Place the beaker in a 65°C water bath to evaporate the solution to form a GO film;

[0044] 3) Add 2.00ml to the beaker with a concentration of 8.00mg·ml -1VC aqueous solution, continue to evaporate the solution in a 65°C water bath, so as to prepare a layer of RGO film on the titanium substrate;

[0045] 4) Prepare the first precursor aqueous solution, which contain...

Embodiment 2

[0052] A method for preparing an electrode with a flexible self-supporting structure, specifically comprising the following steps:

[0053] 1) Using a high-purity titanium sheet as the substrate, sand the titanium sheet substrate with sandpaper to remove oil stains and impurities on the surface, then ultrasonically clean it with acetone, ethanol, and deionized water for 15 minutes, and then dry it;

[0054] 2) Take two titanium substrates with a thickness of 0.20mm and an area of ​​15mm×20mm, and treat the surface with ozone chemical modification for 25 minutes, and then place them flat on a 3.00ml container with a concentration of 0.20mg·ml -1 Place the beaker in a 60°C water bath to evaporate the solution to form a GO film;

[0055] 3) Add 2.00ml to the beaker with a concentration of 8.00mg·ml -1 VC aqueous solution, continue to evaporate the solution in a 60°C water bath, so as to prepare a layer of RGO film on the titanium substrate;

[0056] 4) Prepare the first precurs...

Embodiment 3

[0063] A method for preparing an electrode with a flexible self-supporting structure, specifically comprising the following steps:

[0064] 1) Using a high-purity titanium sheet as the substrate, sand the titanium sheet substrate with sandpaper to remove oil stains and impurities on the surface, then ultrasonically clean it with acetone, ethanol, and deionized water for 15 minutes, and then dry it;

[0065] 2) Take two titanium sheet substrates with a thickness of 0.20mm and an area of ​​15mm×20mm, treat them with ozone for 40 minutes, and then place them flat on a 3.00ml container with a concentration of 0.20mg·ml -1 The bottom of the beaker of the GO aqueous solution, the beaker is placed in an 80 ° C water bath, the solution is evaporated, and a layer of GO film is formed;

[0066] 3) Add 2.00ml to the beaker with a concentration of 8.00mg·ml -1 VC aqueous solution, and continue to evaporate the solution in a water bath at 80 ° C, so as to prepare a layer of RGO film on th...

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Abstract

The invention discloses an electrode with a flexible self-supporting structure and a preparation method thereof, belonging to the technical field of electrochemical energy storage. A metal substrate is soaked in a graphene oxide solution and evaporated to form a layer of graphene oxide on the substrate. The thin film is then reduced with ascorbic acid to obtain the lower layer of reduced graphene oxide thin film; the mixed aqueous solution of transition metal salt, copper salt, and surfactant is spin-coated on the titanium sheet substrate, and synthesized in a flame to prepare The middle nano-carbon film is obtained; the upper reduced graphene oxide film is prepared by the same preparation method as the lower reduced graphene oxide film; the substrate is dried, and the prepared film is peeled off from the substrate to obtain a flexible, metal-free Substrate self-supporting structural electrodes. The electrode has a unique structure, simple preparation method and low cost, and has high area specific capacitance and excellent cycle stability when used as an electrode of a supercapacitor, and has broad application prospects.

Description

technical field [0001] The invention relates to an electrode, in particular to an electrode with a flexible self-supporting structure and its preparation method and application, belonging to the technical field of electrochemical energy storage. Background technique [0002] With the rapid development of society, people's demand for electric energy is increasing. At present, the common electrical energy storage devices are mainly batteries and capacitors, and supercapacitors are a new type of electrical storage devices that have the advantages of these two devices at the same time. The advantages of long life and environmental friendliness. Flexible, lightweight, and high-energy-density supercapacitors are portable and practical, and have become one of the main research directions of supercapacitors. The electrode of a supercapacitor is a key component of the overall device. The electrode is generally composed of a conductive substrate and an active material. The conductiv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/24H01G11/26H01G11/86
CPCY02E60/13
Inventor 曾玮孙良武谢玉巧程瑀梁栋王年徐超黄林生
Owner ANHUI UNIVERSITY
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