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Pomelo peel porous carbon material and preparation methodand application thereof

A porous carbon material, grapefruit peel technology, applied in chemical instruments and methods, carbon compounds, inorganic chemistry, etc., can solve the problems of limited application of supercapacitors, complex production process, long production cycle, etc., to solve the problem of low recycling rate , the raw materials are easy to obtain, the production method is simple and effective

Inactive Publication Date: 2019-12-20
SOUTH CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Activated carbon has a long history of research on capacitors as electrode materials, and the technology is the most mature, but its production process is complicated, the production cycle is long, and the capacity is generally relatively low, which limits the application of supercapacitors

Method used

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  • Pomelo peel porous carbon material and preparation methodand application thereof
  • Pomelo peel porous carbon material and preparation methodand application thereof
  • Pomelo peel porous carbon material and preparation methodand application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] To prepare grapefruit peel charcoal:

[0037] Put 5g of pomelo peel in a porcelain boat, put nitrogen in the tube furnace for 30min, then raise the temperature to 450℃ at a rate of 2℃ / min under the protection of nitrogen, carbonize for 2 hours and then cool naturally to obtain carbonization grapefruit peel. Mix the carbonized pomelo peel and KOH in a certain mass ratio (m (carbonized pomelo peel): m(KOH)=1:1, 1:2, 1:3, 1:4) and name them PH1, PH2 , PH3, PH4. Then each sample was ground in an agate mortar and then placed in a tube furnace and fed with nitrogen for 30 minutes. Under the protection of nitrogen, the temperature was raised to 800 degrees Celsius at a rate of 2 degrees Celsius / min, activated for 2 hours and then cooled naturally. . Add 6M KOH to the activated material and adjust the pH to about 10 (because the alkali will corrode the porcelain boat, so add the lye to dissolve the corroded porcelain boat inner wall material mixed in the material), and put i...

Embodiment 2

[0047] Electrode fabrication and assembly:

[0048] Firstly, nickel foam is washed with deionized water and ethanol ultrasonically, dried and weighed, then the prepared sample is mixed with polyvinylidene fluoride and acetylene black at a mass ratio of 0.85:0.05:0.15, and N-methylpyrrolidone is added After mixing, apply it on 2×1cm foamed nickel, then place it in a vacuum oven and dry it at 80°C for about 6 hours, press it on a desktop electric tablet machine with a pressure of 10MPa, and weigh the mass of foamed nickel again, twice 85% of the mass difference is the active substance mass. A three-electrode system is composed of nickel foam coated with active material as the working electrode, nickel foam as the counter electrode, and HgO / Hg electrode as the reference electrode, immersed in 6MKOH for 3 hours, and 10min N into the electrolytic cell before the test. 2 Exhaust O 2 .

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Abstract

The invention discloses a pomelo peel porous carbon material and a preparation method and application thereof, and relates to electrode materials. The carbon material contains a certain amount of nitrogen elements, the hydrophilicity of an electrode material can be improved, thus the electrode material can form a double-electric-layer capacitance with a water electrolyte well, and the specific capacitance of the electrode material is improved. The preparation method of the carbon material comprises the following steps that (1) pomelo peel is placed in a tube furnace, nitrogen is firstly introduced for 20-40 min, then temperature is raised to 440-460 DEG C at the rate of 1-3 DEG C / min, and cooling is conducted naturally after carbonizing for 1-3 h to obtain carbonized pomelo peel; (2) afterthe carbonized pomelo peel is mixed with KOH according to the mass ratio of 1:(1-4), grinding is conducted, a mixture is placed into the tube furnace, the nitrogen is introduced for 20-40 min, the temperature is raised to 790-810 DEG C at the rate of 1-3 DEG C / min, and cooling is conducted naturally after activating for 1-3 h to obtain activated pomelo peel; and (3) the pH of the activated pomelopeel is adjusted to 10, decompressing, filtering and washing are conducted after centrifuging, and the activated pomelo peel is placed into a blast drying box for drying to obtain the pomelo peel porous carbon material.

Description

technical field [0001] The invention relates to an electrode material, in particular to a pomelo peel porous carbon material and a preparation method and application thereof. Background technique [0002] With the advancement of science and technology, the development of social economy and the rapid growth of population, the consumption of energy is also increasing. The depletion of non-renewable resources urgently requires renewable resources to play their role as substitutes, and at the same time requires the sustainable development of non-renewable resources. , effective use, and give full play to its potential. The existing traditional energy system can no longer meet the development needs of modern industry, agriculture, forestry, etc. Fuel and coal resources are not only non-renewable, but also produce a large amount of CO in the process of use and consumption. 2 , SO 2 and other harmful substances, causing serious environmental pollution. This has prompted people t...

Claims

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Application Information

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IPC IPC(8): C01B32/348C01B32/324H01G11/34H01G11/44
CPCC01B32/324C01B32/348H01G11/34H01G11/44Y02E60/13
Inventor 陈新丽顾凤龙陈晶晶张文雅胡涵姝刘畅
Owner SOUTH CHINA NORMAL UNIVERSITY
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