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Flexible and solid supercapacitor, preparation method and application thereof

A supercapacitor, solid-state technology, used in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor electrodes, hybrid capacitor electrolytes, etc., can solve the problems of poor mechanical properties and can not meet the flexibility and other problems, achieve good charge-discharge cycle stability, high rate The effect of performance, preparation method is simple

Active Publication Date: 2019-03-15
SOUTH CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there are many reports on lignin hydrogels, their applications are limited due to the poor mechanical properties of lignin hydrogels prepared by current technologies and cannot meet the requirements of flexible, solid-state supercapacitor electrolytes.

Method used

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  • Flexible and solid supercapacitor, preparation method and application thereof
  • Flexible and solid supercapacitor, preparation method and application thereof
  • Flexible and solid supercapacitor, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] Example 1: Preparation of the first network lignin hydrogel (N-LP 0.6)

[0062] The lignin was selected as enzymatic lignin derived from corn stalks (Shandong Longli Biotechnology Co., Ltd.), and the cross-linking agent was selected as polyethylene glycol diglycidyl ether (PEGDGE, Mn=500) (purchased from Sigma). Weigh 5g of enzymatic lignin and fully dissolve it in 20mL of 1mol / L NaOH solution, then add 3g of PEGDGE to the above solution according to the mass ratio of lignin to PEGDGE of 1:0.6 and fully dissolve it, then put it in an oven at 50°C The reaction was cured for 2 hours to obtain the first network lignin hydrogel (N-LP 0.6).

Embodiment 2

[0063] Example 2: Preparation of the first network lignin hydrogel (N-LP 0.8)

[0064] The lignin was selected as enzymatic lignin derived from corn stalks (Shandong Longli Biotechnology Co., Ltd.), and the cross-linking agent was selected as polyethylene glycol diglycidyl ether (PEGDGE, Mn=500) (purchased from Sigma). Weigh 5g of enzymatic lignin and fully dissolve it in 20mL of 1mol / L NaOH solution, then add 4g of PEGDGE to the above solution according to the mass ratio of lignin to PEGDGE of 1:0.8 and fully dissolve it, then put it in an oven at 50°C The reaction was cured for 2 hours to obtain the first network lignin hydrogel (N-LP 0.8).

Embodiment 3

[0065] Example 3: Preparation of the first network lignin hydrogel (N-LP 1.0)

[0066] The lignin was selected as enzymatic lignin derived from corn stalks (Shandong Longli Biotechnology Co., Ltd.), and the cross-linking agent was selected as polyethylene glycol diglycidyl ether (PEGDGE, Mn=500) (purchased from Sigma). Weigh 5g of enzymatic lignin and fully dissolve it in 20mL of 1mol / L NaOH solution, then add 5g of PEGDGE to the above solution according to the mass ratio of lignin to PEGDGE of 1:1.0 and fully dissolve it, then put it in an oven at 50°C The reaction was cured for 2 hours to obtain the first network lignin hydrogel (N-LP 1.0).

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Abstract

The invention belongs to the field of supercapacitors and discloses a flexible and solid supercapacitor, a preparation method and application thereof. The supercapacitor comprises a positive electrode, a negative electrode and an electrolyte interposed therebetween, wherein the electrolyte is double-network lignin hydrogel, and both the positive and negative electrodes are conductive electrodes. The double-network lignin hydrogel as the electrolyte in the present invention not only has high mechanical strength property, but also has a simple preparation method, low raw material cost, renewability, green environmental protection, and high ionic conductivity; when the hydrogel is used as the electrolyte to assemble the supercapacitor, additional soaking of an ionic solution is not required and additional use of a diaphragm is not needed, thereby effectively reducing the thickness and weight of the supercapacitor. The obtained capacitor specific capacitance value is higher than the current hydrogel electrolyte type flexible supercapacitor specific capacitance value. In addition, the supercapacitor has very good charging and discharging cycle stability, compression resistance and bending resistance.

Description

technical field [0001] The invention belongs to the field of supercapacitors, in particular to a flexible and solid supercapacitor and its preparation method and application. Background technique [0002] With the depletion of fossil fuels and the seriousness of environmental pollution, people pay more and more attention to green and sustainable alternative energy sources. Among them, supercapacitors are widely used because of their fast charge and discharge, high power density and long service life. Attention, especially flexible and solid-state supercapacitors show good application prospects in the field of wearable devices (Chen, W., et al. Chemical Society Reviews 2018, 47(8), 2837-2872.). Solid-state supercapacitors use solid or semi-solid gel or polymer membranes as electrolytes, which avoid problems such as liquid leakage, corrosion, environmental pollution, difficult assembly, and heavy weight of liquid supercapacitors. In addition to satisfying the solid-state prop...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/32H01G11/56H01G11/84C08J3/075C08J3/24C08L97/00
CPCC08J3/075C08J3/243C08J2397/00H01G11/32H01G11/56H01G11/84Y02E60/13
Inventor 刘珍珍王清文刘涛欧荣贤郭垂根
Owner SOUTH CHINA AGRI UNIV
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