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Method for preparing nitrogenous porous carbon material for electrode material of super-capacitor

A technology of supercapacitors and electrode materials, applied in capacitors, electrolytic capacitors, circuits, etc., to achieve the effects of low cost, good rate performance, and simple preparation process

Inactive Publication Date: 2011-09-21
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Using a green nitrogen-containing carbon precursor-glucosamine salt, through hydrothermal carbonization and activation, a porous carbon material with an appropriate specific surface area and nitrogen-containing functional groups can be obtained, which is an ideal supercapacitor electrode material. This preparation method Have not yet seen literature and patent reports

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  • Method for preparing nitrogenous porous carbon material for electrode material of super-capacitor
  • Method for preparing nitrogenous porous carbon material for electrode material of super-capacitor
  • Method for preparing nitrogenous porous carbon material for electrode material of super-capacitor

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Embodiment 1

[0018] Embodiment 1: Supercapacitor electrode material nitrogen-containing porous carbon I.

[0019] Glucosamine hydrochloride and deionized water were uniformly mixed at a ratio of 1:9, and hydrothermally treated at 180° C. for 12 hours in a polytetrafluoroethylene autoclave to obtain a hydrothermal nitrogen-containing porous carbon precursor. figure 1 It is a typical scanning electron micrograph of a porous carbon precursor synthesized by hydrothermal method. The nitrogen content of the precursor is 7.1%, the carbon content is 67.22%, and the specific surface area is 18m 2 / g; then the precursor and potassium hydroxide were mixed in a mass ratio of 1:2, under the protection of nitrogen, kept at 600° C. for 4 hours, and the obtained product was washed with water to neutrality to obtain nitrogen-containing porous carbon I. Typical scanning electron micrographs of nitrogen-containing porous carbons are as follows: figure 2 . The nitrogen content of the nitrogen-containing po...

Embodiment 2

[0020] Example 2: Supercapacitor electrode material Nitrogen-containing porous carbon II.

[0021] Glucosamine hydrochloride and deionized water are uniformly mixed at 1:9, and in a polytetrafluoroethylene autoclave, 180° C. of hydrothermal treatment for 12 hours obtains a hydrothermal nitrogen-containing porous carbon precursor; then the precursor is mixed with Potassium hydroxide was mixed at a mass ratio of 1:8, and kept at 600° C. for 4 hours under the protection of nitrogen, and the obtained product was washed with water to neutrality to obtain nitrogen-containing porous carbon II. The nitrogen content of the nitrogen-containing porous carbon is 1.3%, and the carbon content is 18.22%. Its specific surface area is 330m 2 / g. The electrode material has a maximum specific capacitance of 86F / g in 1M sulfuric acid electrolyte. The specific capacitance of the electrode material in 6M potassium hydroxide can be as high as 61F / g. The highest specific capacitance of the electr...

Embodiment 3

[0022] Example 3: Supercapacitor Electrode Material Nitrogen-Containing Porous Carbon III.

[0023] Glucosamine hydrochloride and deionized water are uniformly mixed at 1:9, and in a polytetrafluoroethylene autoclave, 180° C. of hydrothermal treatment for 12 hours obtains a hydrothermal nitrogen-containing porous carbon precursor; then the precursor is mixed with Potassium hydroxide was mixed in a mass ratio of 1:4, under the protection of nitrogen, kept at 600°C for 4 hours, and the obtained product was washed with water until neutral to obtain nitrogen-containing porous carbon III. The nitrogen content of the nitrogen-containing porous carbon is 2.8%, and the carbon content is 40.8%. Its specific surface area is 600m 2 / g. The electrode material has a maximum specific capacitance of 269F / g in 1M sulfuric acid electrolyte. The specific capacitance of the electrode material in 6M potassium hydroxide can be as high as 175F / g. The highest specific capacitance of the electrod...

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Abstract

The invention discloses a method for preparing a nitrogenous porous carbon material for an electrode material of a super-capacitor, which belongs to the field of electrochemistry and new energy materials. The method comprises the following steps of: using amino-glucose hydrochloride or amino-glucose sulfate as a raw material; preparing a nitrogenous porous carbon precursor by using a hydro-thermal method; mixing the precursor with potassium hydroxide; and realizing one-step carbonization and activation under the protection of an inert gas. The prepared nitrogenous porous carbon material has an appropriate specific area, and appropriate nitrogen content, the specific capacitance of the nitrogenous porous carbon material in aqueous electrolyte can be up to 270 F / g, the specific capacity of the nitrogenous porous carbon material in an organic system can be 160 F / g, and the nitrogenous porous carbon material is an ideal electrode material of the super-capacitor.

Description

technical field [0001] The invention discloses a method for preparing a nitrogen-containing porous carbon material for supercapacitor electrode materials, belonging to the fields of electrochemistry and new energy materials. Background technique [0002] Climate warming, environmental pollution and energy shortage are major challenges facing mankind at present, and the development of green and renewable energy storage devices is an important issue before mankind. As a new type of green energy storage device, supercapacitors have much higher energy density than traditional capacitors and much higher power density than batteries. application prospects. For example, in terms of high-performance electric vehicles, the supercapacitor is connected in parallel with the battery and the fuel cell. The battery provides energy in normal working conditions, and the supercapacitor supplies energy when pulse energy is needed, so that the service life of the battery can be extended, and t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/02H01G9/042
CPCY02E60/13
Inventor 范丽珍关慧乔素燕周梦琦冯玉川
Owner UNIV OF SCI & TECH BEIJING
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