Large current charge/discharge nitrogen-oxygen co-doped spherical/sheet-like porous carbon material and application thereof in supercapacitor electrode material

A technology of porous carbon materials and electrode materials, applied in hybrid capacitor electrodes, hybrid/electric double-layer capacitor manufacturing, carbon preparation/purification, etc., can solve problems such as limited application and industrial production, high cost, and difficulty in mass production , to achieve the effect of huge application potential and industrial value, excellent electrical performance

Active Publication Date: 2019-11-22
INST OF NEW MATERIALS & IND TECH WENZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Capacitors assembled from materials prepared by this method have unsatisfactory capacity under high current
[0008] As mentioned above, various methods for preparing nitrogen-oxygen-doped carbon materials have been reported in existing patents, and thus a variety of new carbon materials with high performance have been obtained, but these carbon materials usually fail under high-rate conditions. Rapid decay occurs, and even this is difficult to function at higher current densities (>100A / g)
In addition, these synthetic methods also have high cost and difficulty in macro-preparation, which seriously limit their practical application and industrial production.

Method used

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  • Large current charge/discharge nitrogen-oxygen co-doped spherical/sheet-like porous carbon material and application thereof in supercapacitor electrode material
  • Large current charge/discharge nitrogen-oxygen co-doped spherical/sheet-like porous carbon material and application thereof in supercapacitor electrode material
  • Large current charge/discharge nitrogen-oxygen co-doped spherical/sheet-like porous carbon material and application thereof in supercapacitor electrode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] S1: Hexabromobenzene and pyridine were subjected to closed reaction at a reaction pressure of 3MPa and 200°C for 6 hours; wherein, the mass ratio of hexabromobenzene to pyridine was 80:1;

[0056] S2: After the reaction, the pressure was released to normal pressure, and naturally cooled to room temperature, the obtained solid was fully washed 3 times with petroleum ether, and vacuum-dried at 40°C for 10 hours to obtain a dry sample;

[0057] S3: The dried sample was treated at a high temperature of 1000°C for 2 hours under the protection of nitrogen to obtain the nitrogen-oxygen co-doped sphere / sheet porous carbon material, which was named SL1.

Embodiment 2-3

[0058] Embodiment 2-3: the investigation of reaction ratio in the step S1

[0059] Except that the quality of the reaction-free hexabromobenzene in step S1 is replaced by 2g and 6g respectively, other operations are all the same, so that the embodiment 2-3 is carried out successively, and the obtained nitrogen-oxygen co-doped ball / sheet porous carbon The materials were named SL2 and SL3 in turn.

Embodiment 4-6

[0060] Embodiment 4-6: the investigation of high temperature treatment temperature in step S3

[0061] Except that the high-temperature treatment temperature in step S3 was replaced by 800°C, 900°C, and 1100°C, the other operations remained unchanged, so that Examples 7-9 were carried out in sequence, and the obtained nitrogen-oxygen co-doped ball / sheet porous The carbon materials are named SL4, SL5 and SL6 in turn.

[0062] Preparation of capacitor electrodes

[0063] The preparation method of the capacitor electrode comprises the following steps:

[0064] (A) Weigh nitrogen-oxygen co-doped ball / sheet porous carbon material SL1, PTFE (polytetrafluoroethylene) emulsion (the mass ratio of the two is 9:1, due to the good electrical conductivity of the material, during the preparation of the electrode There is no need to add additional conductive agent), add an appropriate amount of ethanol, mix well, and when stirring continuously into a paste, apply it to foamed nickel and st...

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Abstract

The invention relates to a large current charge/discharge nitrogen-oxygen co-doped spherical/sheet-like porous carbon material and applications thereof in a supercapacitor electrode material. The method comprises the following steps that S1, hexabromobenzene and pyridine are subjected to a closed reaction under the reaction pressure higher than the atmospheric pressure; s2, after the reaction is finished, the pressure is relieved to normal pressure, the reaction products are naturally cooled to room temperature, the obtained solid is washed, and vacuum drying is carried out to obtain a dried sample; and S3, high-temperature treatment is carried out on the dried sample under the protection of inert gas to obtain the nitrogen-oxygen co-doped spherical/sheet-like porous carbon material. The nitrogen-oxygen co-doped spherical/sheet-like porous carbon material has excellent electrical properties, and can be applied to the field of supercapacitors. The material can support large-current charging and discharging when applied to a supercapacitor, and can be synthesized in a macro manner. The method is simple in process and excellent in performance, and has good application prospect and industrialization potential.

Description

technical field [0001] The present invention relates to a kind of composite material and its preparation method and application, specifically to a kind of supercapacitor electrode material and its preparation method of nitrogen and oxygen co-doped ball / sheet porous carbon material for high current charge and discharge. Background technique [0002] Supercapacitor is a new type of energy storage device. It has the advantages of high output power, short charging time, long service life, wide operating temperature range, safety and no pollution. It is called "green energy storage device". [0003] Carbon materials, especially heteroatom-doped carbon materials, have the characteristics of high specific surface area and high conductivity. Supercapacitors prepared with them have the characteristics of high power density and long cycle life, and are rich in resources, diverse in structure, and low in cost. [0004] But on the other hand, carbon nanomaterials used as electrode mater...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/05H01G11/86H01G11/32H01G11/24H01G11/30
CPCC01B32/05H01G11/86H01G11/32H01G11/24H01G11/30Y02E60/13
Inventor 金辉乐冯鑫王舜李俊陈星刘一严竺超群吴婉仪
Owner INST OF NEW MATERIALS & IND TECH WENZHOU UNIV
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