Nitrogen-sulfur double-doped mesoporous carbon electrode material as well as preparation method and application thereof

An electrode material and mesoporous carbon technology, which is applied in the field of preparation and application of supercapacitor electrode materials, can solve the problems of ineffective utilization of electrolyte ions, limit specific capacitance and electrochemical charge-discharge performance, etc., and achieve improved electron transfer. properties, improve cycle stability, and reduce resistivity

Inactive Publication Date: 2015-03-25
DONGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, its mixed pore structure prevents the electrolyte ions from being effectively used and limits the space for ions in the pore wall, thereby limiting its specific capacitance and electrochemical charge-discharge performance.

Method used

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  • Nitrogen-sulfur double-doped mesoporous carbon electrode material as well as preparation method and application thereof
  • Nitrogen-sulfur double-doped mesoporous carbon electrode material as well as preparation method and application thereof
  • Nitrogen-sulfur double-doped mesoporous carbon electrode material as well as preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0033] A kind of nitrogen-sulfur double-doped electrode material, its precursor comprises that the template agent diameter of 46% is the silicon dioxide of 15nm, the nitrogen-containing compound PEI (polyethyleneimine, Sigma-Aldrich ( Shanghai) Trading Co., Ltd., 408700-250ML, Mw=2000) and transition metal salt heptahydrate ferrous sulfate with a mass content of 34% (the above mass content is based on the total mass of the precursor).

[0034] The preparation method of the above-mentioned nitrogen-sulfur double-doped electrode material is as follows: polyethyleneimine and silicon dioxide are formulated into 50% PEI aqueous solution and 20% SiO 2 Aqueous solution, weigh 0.7448g FeSO 4 ·7H 2 O and 0.9 g of 50% PEI in water and combined it with 5 g of 20% SiO 2 The aqueous solution was mixed uniformly under the condition of stirring, and then dried overnight in an oven at 85° C. after ultrasonication for 8 hours, and ground into powder to obtain the precursor. Put the above pr...

Embodiment 2

[0037]A kind of nitrogen-sulfur double-doped electrode material, its precursor comprises that the template agent diameter of 46% is the silicon dioxide of 15nm, the nitrogen-containing compound PEI (polyethyleneimine, Sigma-Aldrich ( Shanghai) Trading Co., Ltd., 408700-250ML, Mw=2000) and transition metal salt heptahydrate ferrous sulfate with a mass content of 34% (the above mass content is based on the total mass of the precursor).

[0038] The preparation method of the above-mentioned nitrogen-sulfur double-doped electrode material is as follows: polyethyleneimine and silicon dioxide are formulated into 50% PEI aqueous solution and 20% SiO 2 Aqueous solution, weigh 0.7448g FeSO 4 ·7H 2 O and 0.9 g of 50% PEI in water and combined it with 5 g of 20% SiO 2 The aqueous solution was mixed uniformly under the condition of stirring, and then dried overnight in an oven at 85° C. after ultrasonication for 8 hours, and ground into powder to obtain the precursor. Put the above pre...

Embodiment 3

[0041] A kind of nitrogen-sulfur double-doped electrode material, its precursor comprises that the template agent diameter of 46% is the silicon dioxide of 15nm, the nitrogen-containing compound PEI (polyethyleneimine, Sigma-Aldrich ( Shanghai) Trading Co., Ltd., 408700-250ML, Mw=2000) and transition metal salt heptahydrate ferrous sulfate with a mass content of 34%. (The above mass content is based on the total mass of the precursor)

[0042] The preparation method of the above-mentioned nitrogen-sulfur double-doped electrode material is as follows: polyethyleneimine and silicon dioxide are formulated into 50% PEI aqueous solution and 20% SiO 2 Aqueous solution, weigh 0.7448g FeSO 4 ·7H 2 O and 0.9 g of 50% PEI in water and combined it with 5 g of 20% SiO 2 The aqueous solution was mixed uniformly under the condition of stirring, and then dried overnight in an oven at 85° C. after ultrasonication for 8 hours, and ground into powder to obtain the precursor. Put the above p...

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Abstract

The invention discloses a nitrogen-sulfur double-doped mesoporous carbon electrode material as well as a preparation method and application thereof. A precursor of the electrode material comprises the following components in percentage by mass: 20%-85% of a template agent, 10%-75% of a nitrogen-containing compound and 5%-50% of a transition metal salt. The preparation method comprises the following steps: dissolving the template agent, the nitrogen-containing compound and the transition metal salt in a solvent, so as to obtain the precursor; carrying out calcination reduction on the precursor to obtain a primary carbonized material; carrying out acid pickling on the primary carbonized material to obtain a nitrogen-containing mesoporous carbon material; carrying out acid pickling and calcination reduction again, so as to obtain the nitrogen-sulfur double-doped mesoporous carbon electrode material. The application of the nitrogen-sulfur double-doped mesoporous carbon electrode material in a supercapacitor comprises the following steps: transferring a mixed solution of the electrode material, acetylene black, a binder and a dispersant to a glassy carbon electrode; carrying out three-electrode system testing in electrolyte solutions of different concentrations by virtue of an electrochemical workstation. The nitrogen-sulfur double-doped mesoporous carbon electrode material is of a hierarchical pore structure, has a high specific surface area and is an excellent supercapacitor material.

Description

technical field [0001] The invention belongs to the field of preparation and application of supercapacitor electrode materials, and in particular relates to a nitrogen-sulfur double-doped mesoporous carbon supercapacitor electrode material, preparation method and application. Background technique [0002] Supercapacitors have the characteristics of high energy density, long cycle life, and fast charge and discharge rates. They have been widely used in many fields such as portable electronic devices, memory backup systems, and uninterruptible power supplies. Not only that, there is great potential for cooperation with fuel cells in the conversion of acceleration and braking capabilities of hybrid vehicles. According to different energy storage principles, supercapacitors can be divided into electric double layer capacitors and pseudocapacitors. The electrode materials of electric double layer capacitors are mainly various high specific surface area carbon materials, and the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02H01G11/86
CPCY02E60/13
Inventor 乔锦丽陈文照石晶晶朱泰山王强
Owner DONGHUA UNIV
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