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Self-supporting flexible super capacitor electrode material and preparation method

A technology for supercapacitors and electrode materials, which is applied in the manufacture of hybrid capacitor electrodes and hybrid/electric double-layer capacitors, etc., can solve the problems of reduced electrochemical performance of supercapacitors, shape limitations of electrode devices, etc., so as to save the electrode preparation process and improve The effect of specific capacitance

Inactive Publication Date: 2019-05-07
HANGZHOU INST OF ADVANCED MATERIAL BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the inflexibility of the electrode, the shape of the traditional supercapacitor is greatly limited, and the electrode preparation process involves metal current collectors, conductive agents and binders, which will reduce the electrochemical performance of the supercapacitor.

Method used

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  • Self-supporting flexible super capacitor electrode material and preparation method
  • Self-supporting flexible super capacitor electrode material and preparation method
  • Self-supporting flexible super capacitor electrode material and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] 0.1305g of phenoxy polyphosphazene (PDPP) was dissolved in 10ml of N, N-dimethylformamide, added to 20ml of polyamic acid (PAA) solution with a solid content of 15%, stirred for 12h to obtain a uniform PAA / PDPP solution, wherein the weight ratio of PDPP and PAA is 3.9:100.

[0042] Pour the uniform PAA / PDPP solution into the syringe, and prepare the PAA / PDPP nanofiber membrane by electrospinning. 18kV. Then, the PAA / PDPP nanofiber membrane was heat-treated in an oven with programmed temperature increase, and the heat treatment was performed at 300° C. for 2 hours to obtain a low-temperature heat-treated nanofiber membrane.

[0043] The low-temperature heat-treated nanofiber membrane was placed in a tube furnace, treated in a nitrogen atmosphere at 800°C for 2 hours, the heating rate was 2.5°C / min, and the cooling rate was 5°C / min to obtain a carbonized nanofiber membrane.

[0044] The carbonized nanofiber membrane was immersed in a 5M KOH solution for 0.5 hour, and dr...

Embodiment 2

[0048] 0.2141g of phenoxy polyphosphazene (PDPP) was dissolved in 10ml of N, N-dimethylformamide, added to 20ml of polyamic acid (PAA) solution with a solid content of 15%, stirred for 12h to obtain a uniform PAA / PDPP solution, wherein the weight ratio of PDPP and PAA is 6.4%.

[0049] Pour the uniform PAA / PDPP solution into the syringe, and prepare the PAA / PDPP nanofiber membrane by electrospinning. 18kV. Then, the PAA / PDPP nanofiber membrane was heat-treated in an oven with programmed temperature increase, and the heat treatment was performed at 300° C. for 2 hours to obtain a low-temperature heat-treated nanofiber membrane.

[0050] The low-temperature heat-treated nanofiber membrane was placed in a tube furnace, treated in a nitrogen atmosphere at 800°C for 2 hours, the heating rate was 2.5°C / min, and the cooling rate was 5°C / min to obtain a carbonized nanofiber membrane.

[0051] The carbonized nanofiber membrane was immersed in a 5M KOH solution for 0.5 hour, and dried...

Embodiment 3

[0055] 0.3446g of phenoxy polyphosphazene (PDPP) was dissolved in 10ml of N, N-dimethylformamide, added to 20ml of polyamic acid (PAA) solution with a solid content of 15%, stirred for 12h to obtain a uniform PAA / PDPP solution, wherein the weight ratio of PDPP and PAA is 10.3:100.

[0056] Pour the uniform PAA / PDPP solution into the syringe, and prepare the PAA / PDPP nanofiber membrane by electrospinning. 18kV. Then, the PAA / PDPP nanofiber membrane was heat-treated in an oven with programmed temperature increase, and the heat treatment was performed at 300° C. for 2 hours to obtain a low-temperature heat-treated nanofiber membrane.

[0057] The low-temperature heat-treated nanofiber membrane was placed in a tube furnace, and treated in a nitrogen atmosphere at 800°C for 2 hours, with a heating rate of 2.5°C / min and a cooling rate of 5°C / min to obtain a carbonized nanofiber membrane.

[0058] The carbonized nanofiber membrane was immersed in a 5M KOH solution for 0.5 hour, and...

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Abstract

The invention relates to a self-supporting flexible super capacitor electrode material and a preparation method, and belongs to the technical field of super capacitor electrode materials. The method comprises the following concrete steps that a polyphosphazene and polymer mixed solution is prepared, the mixed solution is used to prepare a polymer / polyphosphazene nanometer fiber film via a static spinning method, and a nitrogen and phosphor doped self-supporting flexible carbon nanometer fiber film is obtained from the polymer / polyphosphazene nanometer fiber film by means of low-temperature heat treatment, high-temperature carbonization and potassium hydrate activation, and can be applied to a flexible super capacitor electrode material. According the method, extra conductive additive and binder are not needed, the electrode material can be used directly, the carbon fiber film electrode material doped with nitrogen and phosphor includes a meso-structure and fake capacitance at the sametime, the specific capacitance can reach 176F / g, the carbon fiber film is highly flexible, and the material can be widely applied to the flexible and wearable electronic fields.

Description

technical field [0001] The invention belongs to the field of supercapacitor electrode materials, and in particular relates to a self-supporting flexible supercapacitor electrode material and a preparation method. Background technique [0002] A supercapacitor is an electrochemical energy storage device that combines the high energy storage capacity of conventional batteries and the high power transmission capability of conventional capacitors. It has fast charge and discharge, high power density, long cycle life, small size, recyclability, environmental protection and safety. And other advantages, are widely used in electric vehicles, portable electronic equipment and emergency power supply and other fields. According to the difference in energy storage mechanism, supercapacitors are divided into electric double layer capacitors and pseudocapacitors. The energy storage and release of electric double layer capacitors is through the rapid adsorption and desorption process of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/24H01G11/30H01G11/36H01G11/86
CPCY02E60/13
Inventor 武德珍闫晓娜齐胜利刘伟
Owner HANGZHOU INST OF ADVANCED MATERIAL BEIJING UNIV OF CHEM TECH
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