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Method for preparing line supercapacitor electrode

A supercapacitor and linear technology, which is applied in the field of preparing linear supercapacitor electrodes, can solve the problems of not being flexible, bendable and foldable, and achieve the effects of facilitating the transmission of electrons, reducing internal resistance, and increasing capacitance

Active Publication Date: 2016-11-23
SHANDONG LVSEN WOOD PLASTIC COMPOSITE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a new type of electrical energy storage device, supercapacitor has its own unique advantages: compared with traditional parallel plate capacitors, it can store more energy (high energy density); compared with lithium-ion batteries, it can store more energy Fast charging and discharging (high power density) and longer life (good cycle stability), however, they do not have flexible, bendable and foldable properties

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Embodiment 1: prepare the preparation of titanium dioxide nanotube / reduced graphene oxide composite fiber material, its main steps are as follows:

[0065] (1) Accurately weigh 0.02 g of the prepared ultra-long titanium dioxide nanotubes and put them into a beaker, add 100 ml of deionized water into the beaker, and stir for 5 minutes. Put the uniformly stirred solution into an ultrasonic cell disruptor for ultrasonic treatment, the ultrasonic power is 500W, and the ultrasonic time is 30 minutes;

[0066] (2) Accurately weigh 0.02 g of graphene oxide and put it into a beaker, add 100 ml of deionized water into the beaker, and stir for 5 minutes. Put the uniformly stirred solution into an ultrasonic cell disruptor for ultrasonic treatment, the ultrasonic power is 960W, and the ultrasonic time is 30 minutes;

[0067] (3) Pour the mixed solution after ultrasonication in the above steps (1) and (2) into a beaker, stir evenly, and put it into an ultrasonic cell disruptor for...

Embodiment 2

[0071] Embodiment 2: By cyclic voltammetry and galvanostatic charge-discharge test test, the electrochemical performance of ultra-long titanium dioxide nanotube / reduced graphene oxide composite electrode material is better than common titanium dioxide nanotube / reduced graphene oxide composite electrode material, Moreover, the mass specific capacitance can reach 118.75 F / g, and the capacitance retention rate can reach 70% after 3000 charge-discharge cycles, which has high stability.

Embodiment 3

[0072] Example 3: Composite nanocellulose with multi-walled carbon nanotubes and ultra-long titanium dioxide nanotubes, using the characteristics of good mechanical properties of nanocellulose to provide support for the entire electrode material, and multi-walled carbon nanotubes to improve the overall electrode material. Conductivity, and ultra-long titanium dioxide nanotubes are not only interspersed between nanocellulose and multi-walled carbon nanotubes, but also use their high specific area to absorb more electrolyte and provide channels for electron transmission. After electrochemical test and analysis, the area specific capacity of nanocellulose / multi-walled carbon nanotubes / ultra-long titanium dioxide nanotubes can reach 62.5mF / cm 2 , after 1000 charge and discharge tests, its capacitance retention rate can reach 95%.

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Abstract

The invention provides a method for preparing a line supercapacitor electrode. The method comprises the steps that 1, cellulose nanofibers are prepared; 2, super long titanium dioxide nanotubes are prepared; 3, a solution obtained by conducting ternary complexing on the cellulose nanofibers, the super long titanium dioxide nanotubes and multiwalled carbon nanotubes is prepared; 4, a line supercapacitor electrode material is prepared. The method has the advantages that the average diameter of the cellulose nanofibers ranges from 30 nm to 50 nm, the length-diameter ratio of the cellulose nanofibers exceeds 1,000; the average diameter of the super long titanium dioxide nanotubes ranges from 40 nm to 80 nm, and the length-diameter ratio of the super long titanium dioxide nanotubes exceeds 800; the cellulose nanofibers, the super long titanium dioxide nanotubes, the multiwalled carbon nanotubes and graphene achieve a network-interpenetrated interlaced system; the line electrode is formed at a time; the electrochemical properties that the area-ratio capacitance is 62.5 mF / cm<2> when scanning is conduced at 10 mV / s, and the capacitance retention rate is 95% after charging and discharge are cycled 1,000 times at the current density of 0.5 mA / cm<2> are achieved.

Description

technical field [0001] The invention relates to a method for preparing a linear supercapacitor electrode, which belongs to the field of supercapacitors. Background technique [0002] Supercapacitors can also be called quasi-Faraday capacitors, electrochemical capacitors or electric double layer capacitors. As a new type of electrical energy storage device, supercapacitor has its own unique advantages: compared with traditional parallel plate capacitors, it can store more energy (high energy density); compared with lithium-ion batteries, it can store more energy Fast charging and discharging (high power density) and longer life (good cycle stability), however, they do not have the properties of flexible bending and folding. Contents of the invention [0003] The object of the present invention is to compound titanium dioxide nanotubes, nanocellulose, multi-walled carbon nanotubes, and graphene oxide to prepare flexible, bendable and foldable nanocellulose / multi-walled carb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/86H01G11/24H01G11/26H01G11/28H01G11/30H01G11/36H01G11/46
CPCH01G11/24H01G11/26H01G11/28H01G11/30H01G11/36H01G11/46H01G11/86Y02E60/13
Inventor 李大纲莫梦敏王飞李玲张春霞高涵王秋杰
Owner SHANDONG LVSEN WOOD PLASTIC COMPOSITE
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