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Flexible electrode with carbon fiber wrapped metal oxide for capacitor and preparation method

A flexible electrode and oxide technology, which is applied in the manufacture of hybrid capacitor electrodes and hybrid/electric double layer capacitors, can solve the problems of poor cycle stability of electrode materials, cumbersome processes, and poor controllability, and achieves low cost and controllable material structure. , the effect of improving performance

Inactive Publication Date: 2017-02-22
DALIAN OCEAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Both of the above two methods have the following disadvantages: the preparation process requires the use of surface chemical deposition or electrodeposition methods, which are cumbersome and poorly manipulated; the metal oxide nanoparticle layer is exposed on the outer surface without forming a carbon-wrapped structure, resulting in a stable cycle of electrode materials poor sex

Method used

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  • Flexible electrode with carbon fiber wrapped metal oxide for capacitor and preparation method
  • Flexible electrode with carbon fiber wrapped metal oxide for capacitor and preparation method
  • Flexible electrode with carbon fiber wrapped metal oxide for capacitor and preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0029] a. Weigh 10 g of polyacrylonitrile (PAN) particles into 190 mL of dimethylformamide (DMF) solvent, stir at 80°C for 60 min until completely dissolved, forming a uniform, stable, and viscous sol;

[0030] b. Dissolve 0.5g tetrabutylammonium bromide (TBAB) in 1g water, add 0.5g MnO 2 Particles were ultrasonically dispersed for 30 min, then 2.5 g of acrylonitrile (AN) and 2.5 g of azobisisobutyronitrile (AIBN) were added to the above solution, and the reaction was refluxed at 80 ° C for 3 h to obtain PAN-modified MnO 2 particle;

[0031] c. Add PAN-modified MnO to the sol solution at a mass percentage of 0.1% 2 Particles, magnetically stirred for 1h, and then ultrasonically dispersed for 0.5h to obtain uniformly dispersed MnO 2 - polyacrylonitrile (PAN) complex solution;

[0032] d. MnO 2 - Pour polyacrylonitrile (PAN) compound solution into a 10 mL glass syringe, connect the needle tip to the positive pole of the high-voltage power supply, connect the aluminum foil co...

Embodiment 2

[0036] a. Weigh 10 g of polyacrylonitrile (PAN) particles into 56.6 mL of tetrahydrofuran (THF) solvent, stir at 80 °C for 90 min until completely dissolved, forming a uniform, stable, and viscous sol;

[0037] b. Weigh 10 g of polyvinylpyrrolidone (PVP-90), add it to 115 mL of absolute ethanol, and stir magnetically at room temperature for 0.5 h to obtain a PVP solution with a concentration of 8%;

[0038] c. Dissolve 0.5 g tetrabutylammonium bromide (TBAB) in 3 g water, add 5 g MnO 2 Particles were ultrasonically dispersed for 60 min, then 2.5 g of acrylonitrile (AN) and 2.5 g of azobisisobutyronitrile (AIBN) were added to the above solution, and refluxed at 80 ° C for 3 h to obtain PAN-modified MnO 2 particle;

[0039] d. Add PAN-modified MnO to the PVP solution at a mass percentage of 3% 2 Particles, magnetically stirred for 1h, and then ultrasonically dispersed for 0.5h to obtain uniformly dispersed MnO 2 - polyvinylpyrrolidone composite solution;

[0040] e. Combine ...

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Abstract

The invention discloses a flexible electrode with carbon fiber wrapped metal oxide for a capacitor and a preparation method. Through surface modification of metal oxide nanoparticles and the like, a flexible membrane that metal oxide nanoparticles are wrapped with a carbon nano fiber (a one-dimensional carbon material) is prepared by using an electrospinning technique, and the flexible membrane can be used in a flexible super-capacitor electrode. Not only is good flexibility achieved, a sufficient buffer space can be provided for volume variation of the metal oxide nanoparticles in operation through the carbon nano fiber, the volume effect of the metal oxide can be reduced, advantages of high specific capacitance, good stability and the like can be achieved, and the properties of a flexible capacitor can be further improved. In addition, methods such as surface chemical deposition or electric deposition are not needed in the production process, and the flexible electrode is simple to operate, controllable in material structure, low in cost and applicable to large-scale industrial production.

Description

technical field [0001] The invention relates to a flexible electrode for capacitors and a preparation method thereof, in particular to a flexible electrode for capacitors with good flexibility, high specific capacitance and good stability and carbon fiber wrapping metal oxides and a preparation method thereof. Background technique [0002] With the development of portable and wearable electronic devices, flexible supercapacitors have received extensive attention, and flexible electrodes are the key to flexible supercapacitors. Capacitor electrode materials are divided into two types: electric double layer capacitance and pseudocapacitance: electric double layer capacitance is mainly based on carbon materials, although the cycle performance is good, but the specific capacitance is very low; pseudocapacitance materials are mainly based on metal oxides, although the specific capacitance is high, But cycle performance and flexibility are poor. Therefore, at present, people are ...

Claims

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Application Information

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IPC IPC(8): H01G11/46H01G11/40H01G11/86
CPCY02E60/13H01G11/46H01G11/40H01G11/86
Inventor 潘超汪静
Owner DALIAN OCEAN UNIV
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