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A kind of preparation method of doped carbon material for supercapacitor

A carbon material and doping technology, which is applied in the field of preparation of doped carbon materials, can solve the problems of poor plasticity, failure to meet urgent requirements, and limited repeatability in the preparation process, and achieve low price, high safety, and low cost Effect

Active Publication Date: 2017-10-27
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the past, carbon sources were mostly concentrated in biomass (such as CN201410417487, CN201410303083) or carbohydrates (such as CN201410190621, CN201310713624, CN201110290185). These carbon sources have the advantages of wide sources and low cost, but the preparation process has poor plasticity and limited repeatability; , the rich functionality of this type of carbon source will cause a large amount of waste gas (such as carbon monoxide, carbon dioxide, etc.) emissions, which does not meet the urgent requirements of today's environmental protection

Method used

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  • A kind of preparation method of doped carbon material for supercapacitor
  • A kind of preparation method of doped carbon material for supercapacitor
  • A kind of preparation method of doped carbon material for supercapacitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] 2.00 g of sodium ethoxide was immersed in 10 ml of azamide, along with 1.00 g of polyvinylidene chloride and 0.50 g of melamine, followed by the addition of 1.00 g of potassium hydroxide. The above mixture is processed by ball milling to make the reactants fully contact. The rotation frequency of the ball mill is about 30Hz, and the processing time is 2 hours. After the treatment, vacuum drying at 70°C was directly carried out. The obtained dried samples were calcined under the protection of nitrogen, and the calcining temperature was 700°C. The calcined product was washed three times with deionized water and dried at 60°C to obtain the doped carbon material.

[0059] The transmission electron microscope photo of the doped carbon material obtained specifically can be found in figure 1 . The rich hollow structure in the transmission electron microscope photos shows that the prepared doped carbon material has a relatively rich pore structure. SEM photo see figure 2...

Embodiment 2

[0063] 1.00 grams of polyvinylidene chloride (abbreviated as PVDC) and 0.75 grams of melamine were immersed in 10 milliliters of nitrogen dimethylformamide, followed by the addition of 1.70 grams of zinc oxide. The above mixture was processed by ball milling to make the reactants fully contact, the rotation frequency of the ball mill was about 30 Hz, and the processing time was 4 hours. After the treatment, vacuum drying at 70°C was directly carried out. The obtained dried samples were calcined under the protection of nitrogen, and the calcining temperature was 700°C. The calcined product was washed three times with deionized water and dried at 60°C to obtain the doped carbon material.

[0064] The transmission electron microscope photo of the doped carbon material obtained specifically can be found in Figure 12 . SEM photo see Figure 13 . Electron microscope results show that the obtained doped carbon material is interconnected sheet-like porous amorphous material. Fo...

Embodiment 3

[0066] Use PVDC as a carbon source, ethylenediamine as a nitrogen doping agent, and magnesium oxide as a strong alkali dechlorination agent. The usage amounts of the three are 1.0g, 2.0mL and 3.0g respectively. in dimethylacetamide (DMA). Other processing modes are with embodiment 2.

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Abstract

The invention relates to a preparing method for a doped carbon material of a super-capacitor, which comprises the following steps: mixing polyvinylidene chloride, strong base and strong polar solvent for obtaining a mixture; then grinding the mixture; after grinding, calcining the ground mixture in an inert gas; and then performing cleaning and drying for obtaining the doped carbon material. The strong base is alkaline-earth metal hydroxide, alkaline-earth metal oxide, zinc oxide, alkaline-earth metal amide, alkaline-earth metal sulfide, alkaline-earth metal nitride or alkaline-earth metal alkoxide. The strong polar solvent is N,N-Dimethylformamide, N,N-Dimethylacetamide, dimethyl sulfoxide or N-methyl pyrrolidone. The preparing method has advantages of low price and easy availability of raw material, low cost, simple preparing process, high safety and environment-friendly performance. The prepared carbon material has excellent double-layer capacitance and important popularization value.

Description

technical field [0001] The invention belongs to the field of preparation methods of doped carbon materials, and in particular relates to a preparation method of doped carbon materials for supercapacitors prepared based on cheap industrial raw material polyvinylidene chloride. Background technique [0002] Supercapacitor is an emerging green energy storage device. Compared with traditional lithium-ion energy storage devices, it has the advantages of high power density, short charging time, and long cycle life, and has broad application prospects. The core of a supercapacitor is the capacitor electrode material. Commonly used capacitor electrode materials include carbon materials, metal (hydroxide) oxides, and the like. Among them, carbon materials have attracted much attention because of their wide source of raw materials, stable physical and chemical properties, and good charge and discharge performance. Carbon materials that can be used in capacitors include carbon nanotub...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/86H01G11/34H01G11/44
CPCY02E60/13
Inventor 孙晓明张国新周康徐若雨
Owner BEIJING UNIV OF CHEM TECH
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