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A method for preparing an all-hydrogel stretchable supercapacitor and the capacitor

A technology for supercapacitors and hydrogels, applied in hybrid capacitor electrodes, hybrid capacitor electrolytes, hybrid/electric double layer capacitor manufacturing, etc., can solve the problem that the substrate does not make any contribution to the electrochemical energy storage of supercapacitors, electrode materials and elastic substrates Stretchability does not match, active materials cannot be distributed ideally and continuously, etc., to achieve good charge-discharge cycle stability, excellent electrochemical properties, and good stretchability

Active Publication Date: 2019-11-12
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above methods provide some reference ideas in the preparation of stretchable supercapacitors. However, these methods also have some disadvantages, such as the stretchability of the electrode material and the elastic substrate do not match during the stretching process, and the The active material cannot be distributed ideally and continuously, the substrate does not contribute to the electrochemical energy storage of the supercapacitor, and the pre-stretching method requires pre-stressing, which is not suitable for large-scale actual production, etc.

Method used

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  • A method for preparing an all-hydrogel stretchable supercapacitor and the capacitor
  • A method for preparing an all-hydrogel stretchable supercapacitor and the capacitor
  • A method for preparing an all-hydrogel stretchable supercapacitor and the capacitor

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preparation example Construction

[0037] figure 1 It is a schematic diagram of the design principle of preparing an all-hydrogel stretchable supercapacitor constructed according to the present invention, and the stretchable supercapacitor is assembled entirely from hydrogel materials. Such as figure 1 As shown in , the preparation process mainly includes the following process steps:

[0038] S1 First, the dilution of carbon nanotubes (CNTs)

[0039] Weigh the CNT water-based slurry, add deionized water, stir first, and then sonicate.

[0040] In this step, the commercially available CNT water-based slurry with a mass fraction of 5% can be added to deionized water, stirred first, and then ultrasonicated. Specifically, the stirring time is preferably set at 6h-10h, and the stirring speed is preferably set at 200-500r / min until the mixed solution is stirred into a uniform ink-like solution; then it is ultrasonically 60min-120min, more preferably 90min , to obtain a dilute solution of the CNT water-based dispe...

Embodiment 1

[0055] Weigh acrylamide, dissolve acrylamide in the diluted aqueous dispersion of CNT with a mass fraction of 2%, stir evenly, then weigh sodium alginate, slowly add it to the mixture, and stir at room temperature for 8 hours until it forms Uniform CNT / AM / SA mixed solution, the mass fraction of acrylamide in the uniform CNT / AM / SA mixed solution is 17%, the mass fraction of sodium alginate is 2%; The AM / SA mixture was mixed with PEDOT / PSS (model PH1000), stirred at room temperature for 2 h, and then 0.01% of the cross-linking agent N,N-methylenebisacrylamide was added sequentially, and the mass fraction of 0.09% The catalyst tetramethylethylenediamine and the initiator ammonium persulfate with a mass fraction of 0.1% are mixed evenly, and the mixed solution is quickly transferred to a clean petri dish, and left to stand for 6 hours until the polymerization reaction is complete; The petri dish was sealed and then placed in a drying oven at 80°C for 12 hours to complete the polym...

Embodiment 2

[0059] Weigh acrylamide, dissolve the acrylamide in the diluted aqueous dispersion of CNT with a mass fraction of 2%, stir evenly, then weigh sodium alginate, slowly add it to the mixture, and stir at room temperature for 8 hours until Form a uniform CNT / AM / SA mixed solution, the mass fraction of acrylamide in the uniform CNT / AM / SA mixed solution is 16%, the mass fraction of sodium alginate is 3%; / AM / SA mixture mixed with PEDOT / PSS (model PH1000), stirred at room temperature for 3 hours, and then sequentially added 0.02% of cross-linking agent N,N-methylenebisacrylamide with a mass fraction of 0.1% The catalyst tetramethylethylenediamine and the initiator ammonium persulfate with a mass fraction of 0.1% are mixed evenly, and the mixed solution is quickly transferred to a clean petri dish, and left to stand for 6 hours until the polymerization reaction is complete; The complete petri dish is sealed and then placed in a drying oven at 70°C for 12 hours to complete the polymeriz...

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Abstract

The invention belongs to the field of supercapacitor production and specifically discloses a method for producing an all-hydrogel stretchable supercapacitor and the capacitor. The stretchable supercapacitor is assembled in a traditional sandwich structure by taking sodium alginate / polyacrylamide / carbon nanotube / poly(3,4-ethylendioxythiophene)-polystyrolsulfon acid composite hydrogel with high stretchability as an electrode material and sodium alginate / polyacrylamide / sodium sulfate / redox couple composite hydrogel with high stretchability as electrolyte. Each of the electrode material and electrolyte provided in the method is based on a stretchable hydrogel material, and strong adhesion exists between the electrode material and the electrolyte, so that the constraint that an existing assembling technology needs the help of a stretchable base can be avoided. The all-hydrogel stretchable supercapacitor is suitable for a traditional application field of the supercapacitor and high-end application fields such as wearable electronic equipment, stretchable electronic equipment, electronic skins and portable integrated devices.

Description

technical field [0001] The invention belongs to the field of supercapacitor preparation, and more specifically relates to a method for preparing an all-hydrogel stretchable supercapacitor and the capacitor. Background technique [0002] At present, with the continuous progress of technological development, wearable, portable, integrated and intelligent electronic devices are an inevitable development trend. These devices not only need to have good flexibility, but also need to have a certain degree of stretchability to meet the needs of higher production and life. Therefore, in recent years, stretchable electronic devices have developed very rapidly and have good application prospects. As an important energy storage device, supercapacitors are widely used in portable electronic devices. [0003] In recent years, the stretchable supercapacitors that have been reported usually require a stretchable elastic polymer film as a substrate (such as PDMS), and the relatively mature...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F251/00C08F220/56C08J3/075H01G11/30H01G11/56H01G11/86
CPCC08F251/00C08J3/075C08J2351/02H01G11/30H01G11/56H01G11/86C08F220/56Y02E60/13
Inventor 魏璐曾娟郭新
Owner HUAZHONG UNIV OF SCI & TECH
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