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Method for manufacturing cellulose nanofiber electrochromism supercapacitor

A supercapacitor and nanofiber technology, applied in the manufacture of hybrid/electric double layer capacitors, etc., can solve the problems of high thermal expansion coefficient, low processing temperature, difficult biodegradation and recycling, and achieve good uniformity, good flexibility and Improved transparency and cycle stability

Active Publication Date: 2014-08-20
BEIJING INSTITUTE OF TECHNOLOGYGY +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of low processing temperature, high thermal expansion coefficient, difficult biodegradation and recycling of traditional polymer substrates, and provide a method for preparing a cellulose nanofiber-based flexible electrochromic film supercapacitor

Method used

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  • Method for manufacturing cellulose nanofiber electrochromism supercapacitor
  • Method for manufacturing cellulose nanofiber electrochromism supercapacitor
  • Method for manufacturing cellulose nanofiber electrochromism supercapacitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1. Carry out TEMPO catalytic oxidation of bamboo pulp fibers to prepare oxidized cellulose, then process the oxidized cellulose with an ultrasonic cell pulverizer, and centrifuge the mixture to obtain the supernatant to obtain a CNFs dispersion;

[0028] 2. Pour the CNFs dispersion obtained in step 1 into a special plastic evaporating dish, and let it stand for several days to obtain a CNFs base film with a thickness of 0.2mm;

[0029] 3. Immerse the CNFs base film obtained in step 2 into CuCl with a temperature of 30°C and a concentration of 1 mg / mL (pH value 4.66). 2 After being in the solution for 1 min, it was taken out, rinsed with deionized water and dried in the air to obtain CNFs / Cu 2+ membrane;

[0030] 4. Adjust the pH value of the GO dispersion liquid with a concentration of 8.7 mg / mL (that is, 8.7 mg of GO dispersed in each mL of water) to the same value as the above CuCl 2 The pH value of the solution is the same, i.e. 4.66, and then the CNFs / Cu obtained ...

Embodiment 2

[0040] 1. Carry out TEMPO catalytic oxidation of wood pulp fibers to prepare oxidized cellulose, then process the oxidized cellulose with an ultrasonic cell pulverizer, and centrifuge the mixture to obtain the supernatant to obtain a CNFs dispersion;

[0041] 2. Pour the CNFs dispersion obtained in step 1 into a special plastic evaporating dish, and let it stand for several days to obtain a CNFs base film with a thickness of 0.15mm;

[0042] 3. Immerse the CNFs base film obtained in step 2 into CuCl with a temperature of 60°C and a concentration of 25 mg / mL (pH value 2.39) 2 After being in the solution for 1 min, it was taken out, rinsed with deionized water and dried in the air to obtain CNFs / Cu 2+ membrane;

[0043] 4. Adjust the pH value of the GO dispersion with a concentration of 1 mg / mL to the same value as the above CuCl 2 The pH value of the solution is the same, i.e. 2.93, and then the CNFs / Cu obtained in step 3 2+ The film was immersed in GO dispersion at 60 °C fo...

Embodiment 3

[0053] 1. Prepare oxidized cellulose by TEMPO catalytic oxidation of straw pulp fiber, then process the oxidized cellulose with an ultrasonic cell pulverizer, and centrifuge the mixture to obtain the supernatant to obtain a CNFs dispersion;

[0054] 2. Pour the CNFs dispersion obtained in step 1 into a special plastic evaporating dish, and let it stand for several days to obtain a CNFs base film with a thickness of 0.25mm;

[0055] 3. Immerse the CNFs base film obtained in step 2 into CuCl with a temperature of 90°C and a concentration of 75 mg / mL (pH value 1.56). 2 After being in the solution for 1 min, it was taken out, rinsed with deionized water and dried in the air to obtain CNFs / Cu 2+ membrane;

[0056] 4. Adjust the pH value of the GO dispersion with a concentration of 10 mg / mL to the same value as the above CuCl 2 The pH value of the solution is the same, i.e. 1.56, and then the CNFs / Cu obtained in step 3 2+The film was immersed in GO dispersion at 90 °C for 1 min, ...

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Abstract

The invention relates to a method for manufacturing a cellulose nanofiber electrochromism supercapacitor, and provides a method for manufacturing the cellulose nanofiber-supported flexible electrochromism thin film supercapacitor. The method is higher in machining temperature and low in thermal expansion coefficient, and facilitates biodegradation. The method for manufacturing the cellulose nanofiber electrochromism supercapacitor has the steps that a CNFs / [Cu<2+>-GO]n composite thin film is immersed into a PANI dispersion liquid, the thin film is taken out, cleaned and dried and then is immersed into PEDOT:PSS dispersion liquid, the thin film is taken out, cleaned and dried, the above steps are repeated for m times, and finally a CNFs / [Cu<2+>-GO]n / [PANI-PEDOT:PSS]m multi-layer composite film is obtained; dilute hydrochloric acid treatment and HI acid reduction are performed on the manufactured CNFs / [Cu<2+>-GO]n / [PANI-PEDOT:PSS]m film to obtain a CRGPP-m composite conductive film, the double-piece CRGPP-m composite conductive film is taken as an electrode, H2SO4-PVA gel is taken as electrolyte, and the supercapacitor S-RGPP of a double-electrode system can be assembled. The unit-area capacitance of the manufactured supercapacitor S-RGPP is greatly improved, the good light transmittance reaches 37.8 percent, and after discharging and charging are performed for 1,000 times, the unit-area capacitance can reach 78.3 percent of an initial unit-area capacitance.

Description

technical field [0001] The invention relates to a flexible electrochromic thin-film supercapacitor with an organic substrate, in particular to a preparation method for a cellulose nanofiber-based flexible electrochromic thin-film supercapacitor, and belongs to the field of flexible electrochromic supercapacitors. Background technique [0002] Flexible electrochromic thin film supercapacitors are widely used in display devices, e-books, electrochromic smart windows, glare-free mirrors, military anti-counterfeiting, sensing, and communication due to their excellent flexibility, conductivity, and unique electrochromic properties. , Electro-drive and other fields have very attractive application prospects, and thus have received more and more attention. At present, flexible electrochromic thin film supercapacitors generally use metal oxides, carbon materials, conductive polymers and other materials as transparent conductive layers, and inorganic color-changing materials or condu...

Claims

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Application Information

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IPC IPC(8): H01G11/84
CPCY02E60/13
Inventor 王飞俊吴雪邵自强王茜王文俊张仁旭
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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