Nitrogen-doped porous carbon and preparation method as well as application of nitrogen-doped porous carbon to super-capacitor electrode material

A technology of porous carbon and nitrogen doping, which is applied in the field of supercapacitor electrodes, preparation, and nitrogen-doped porous carbon. It can solve the problems of limiting the application value of porous carbon reagents, low energy density, etc., and achieve improved pore utilization and high specific capacitance. and energy density, the effect of high electric double layer capacitance

Active Publication Date: 2017-05-10
ANHUI UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Literature Liang Q, Ye L, Huang Z H, et al.Ahoneycomb-like porous carbon derived from pomelo peel for use in high-performance supercapacitors[J].Nanoscale,2014,6(22):13831-13837. Using natural waste Honeycomb-shap

Method used

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  • Nitrogen-doped porous carbon and preparation method as well as application of nitrogen-doped porous carbon to super-capacitor electrode material
  • Nitrogen-doped porous carbon and preparation method as well as application of nitrogen-doped porous carbon to super-capacitor electrode material
  • Nitrogen-doped porous carbon and preparation method as well as application of nitrogen-doped porous carbon to super-capacitor electrode material

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Embodiment 1

[0037](1) Take the natural waste peanut shells, wash them in deionized water, dry them in the air, and pre-crumble them with a tissue grinder; then, use deionized water as a dispersant, and use a planetary ball mill to further grind the pre-crushed peanut shells For processing, the rotating speed is 500 rpm, and the ball milling time is 12 hours.

[0038] (2) The slurry after ball milling is sieved through a 250-mesh screen cloth, and the filtrate is centrifuged at a speed of 8000 rpm to obtain a precipitate, which is repeatedly ultrasonically washed 3 times with absolute ethanol and deionized water, and the centrifugal precipitate is subjected to Obtain pretreated peanut shell powder after drying at 50 degrees centigrade.

[0039] (3) Weigh 0.5 grams of peanut shell powder and 1 gram of melamine, grind them evenly, then add 1 gram of potassium hydroxide and 5 milliliters of deionized water to the system, continue to grind until uniform, and transfer them to a drying oven at 5...

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Abstract

The invention discloses nitrogen-doped porous carbon and a preparation method as well as application of the nitrogen-doped porous carbon to a super-capacitor electrode material and belongs to the technical field of energy source materials and application. The nitrogen-doped porous carbon is prepared by taking natural waste products, namely peanut shells, as raw materials through steps of carrying out ball milling, sieving, carrying out high-temperature activation and washing. The nitrogen-doped porous carbon prepared by the invention has graded pores including micro-pores and medium pores; a main pore diameter range is 2nm to 5nm, the specific surface area is 1000 square meters per gram to 1200 square meters per gram, the nitrogen mass ratio is 8 percent to 10 percent and the mass specific capacitance is 290 Faraday per gram to 310 Faraday per gram; the mass energy density of a nitrogen-doped porous carbon based super-capacitor prepared from the nitrogen-doped porous carbon is 40 watt-hour per kilogram to 43 watt-hour per kilogram; the nitrogen-doped porous carbon has excellent circulating stability so that the nitrogen-doped porous carbon can be better applied to the field of super-capacitor electrodes.

Description

technical field [0001] The invention belongs to the technical field of energy materials and applications, and in particular relates to a nitrogen-doped porous carbon, a preparation method and its application as a supercapacitor electrode. Background technique [0002] Porous carbon is often used as a supercapacitor electrode material due to its special porous structure, high specific surface area, stable chemical structure, good capacitive performance, and low price, but its low conductivity, low energy density and other factors severely limit it. its practical commercial application. In recent years, nitrogen-doped porous carbons have attracted extensive attention due to their superior electrochemical performance compared with traditional porous carbons. [0003] The raw materials and methods for preparing porous carbon are various. For example, the patent application number 201510004277.6 discloses a method for preparing porous carbon. Polycarboxylic acid and diamine are ...

Claims

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Application Information

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IPC IPC(8): C01B32/348C01B32/324C01B32/378H01G11/32H01G11/26H01G11/86
CPCY02E60/13H01G11/32C01P2002/70C01P2002/80C01P2004/03C01P2006/12C01P2006/14C01P2006/17C01P2006/40H01G11/26H01G11/86
Inventor 毕红张翔
Owner ANHUI UNIVERSITY
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