Narrow-neck bottle type porous carbon and redox micromolecule composite supercapacitor energy storage electrode material and preparation method

A technology for supercapacitors and energy storage electrodes, which is applied in the manufacture of hybrid capacitor electrodes, hybrid/electric double layer capacitors, etc., can solve the problems of poor cycle stability and electrochemical capacity decay of composite electrode materials, and achieve the purpose of suppressing loss and excellent performance. Rate characteristics, high capacity effect

Active Publication Date: 2017-09-01
HARBIN ENG UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

However, due to the absence of constraints, redox active species gradually diffuse into the electrolyte and lose during multiple electrochemical cycles, which eventually leads to a rapid decline in the electrochemical capacity of the composite electrode material and poor cycle stability.

Method used

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  • Narrow-neck bottle type porous carbon and redox micromolecule composite supercapacitor energy storage electrode material and preparation method
  • Narrow-neck bottle type porous carbon and redox micromolecule composite supercapacitor energy storage electrode material and preparation method
  • Narrow-neck bottle type porous carbon and redox micromolecule composite supercapacitor energy storage electrode material and preparation method

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Embodiment 1

[0037]1) Preparation of composite electrode materials

[0038] Take 1g of SiO with an average diameter of 150nm 2 Mix the powder, 0.5g pitch, 0.01g potassium citrate and 50g tetrahydrofuran (THF) evenly, and heat in a water bath at 60°C to evaporate the solvent. Then carbonization was carried out at 850 °C for 2 h in a nitrogen atmosphere in a tube furnace. After natural cooling to room temperature, soak and wash with dilute hydrofluoric acid solution to remove SiO 2 , then washed with distilled water to become neutral, and dried at 100°C for 24 hours to obtain a "flask" type porous carbon (structure as attached figure 1 , 3 shown), the sample is labeled FC.

[0039] Immerse equal volumes of FC in 10%wt potassium ferricyanide solution (the weight ratio of potassium ferricyanide to FC is 20:80, soak for 24 hours, vacuum degassing, and dry at 100-150°C to obtain the electrode material FC -K 3 Fe(CN) 6 (if attached figure 2 shown).

[0040] 2) Characterization and descr...

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Abstract

The invention provides a narrow-neck bottle type porous carbon and redox micromolecule composite supercapacitor energy storage electrode material and a preparation method. A composite supercapacitor energy storage electrode system comprises narrow-neck bottle type porous carbon and a redox active substance for charging pore channels, wherein the content of the redox active substance is 0.1 to 50 weight percent; the narrow-neck bottle type porous carbon consists of spherical holes with diameters of 50 to 500nm and hole walls of the spherical holes, small holes are uniformly distributed in the hole walls, and penetrate through all the large-sized spherical holes, and the ratio of the diameters of each small hole and each spherical hole is (0.1 to 10):100. The narrow-neck bottle type porous carbon and redox micromolecule composite supercapacitor energy storage electrode system is high in capacity and rate performance and ultralong in service lifecycle.

Description

technical field [0001] The invention relates to a supercapacitor energy storage electrode material. The invention also relates to a preparation method of a supercapacitor energy storage electrode material. Background technique [0002] Supercapacitor is a new type of energy storage device, which has the characteristics of high power density, fast charge and discharge speed, environmental friendliness and long cycle life. It is widely used in automobiles, electronics, communications, aerospace and other fields. Porous carbon materials have stable physical and chemical structures, good electrical conductivity, high specific surface area, wide range of sources, and low price. They are currently the main commercial supercapacitor electrode materials. Since the surface of carbon materials can only provide electric double layer capacitance, in order to improve the specific capacity of carbon materials, many researchers proposed to combine carbon materials with small redox molecul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/24H01G11/30H01G11/38H01G11/86
CPCY02E60/13H01G11/24H01G11/30H01G11/38H01G11/86
Inventor 范壮军盛利志江丽丽魏彤
Owner HARBIN ENG UNIV
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