Mesopore-micropore carbon micro sphere of high specific surface area for super capacitor and preparation method of carbon micro sphere

A high specific surface area, supercapacitor technology, applied in the field of materials, can solve the problems of low specific surface area and pore volume, affect the service life of equipment, and unfavorable capacitance performance, etc., and achieve the effect of simple preparation process, improved hydrophilicity and low price

Inactive Publication Date: 2016-02-24
XIAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the existing microporous carbon materials are mostly activated by strong acid and strong alkali. However, strong acid and strong alkali will cause great corrosion to the equipment, which will affect the service life of the equipment, increase the production cost, and also increase the risk factor.
[0004] Chinese patent CN103159886A discloses a preparation method of ultra-high specific surface area monodisperse polymer microspheres, using soap-free miniemulsion po

Method used

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  • Mesopore-micropore carbon micro sphere of high specific surface area for super capacitor and preparation method of carbon micro sphere
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  • Mesopore-micropore carbon micro sphere of high specific surface area for super capacitor and preparation method of carbon micro sphere

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Embodiment 1

[0037] A preparation method for high specific surface area mesoporous-microporous carbon microspheres for supercapacitors, comprising the following steps:

[0038] (1) Dissolve 2gPVPK-30 and 2gSBA-15 in 90mL ethanol at 60-80°C to obtain solution A; dissolve 3g ammonium polyphosphate in 10mL water to obtain solution B; add solution A and solution B to the Stirrer, condenser, thermometer and vent 2 250mL four-necked flask, then 20g styrene and 0.2g initiator AIBN (azobisisobutyronitrile) were shaken and mixed evenly, and slowly dropped into the four-necked flask. Cool to room temperature to obtain an emulsion. Then carry out centrifugal sedimentation at a speed of 3500r / min, discard the supernatant, wash the microspheres in the lower layer with absolute ethanol, and after ultrasonic dispersion, centrifuge and wash again, and repeat this 5 times to remove unreacted styrene and other raw materials; Finally, it was poured into a petri dish and dried in a vacuum oven at 60° C. for...

Embodiment 2

[0057] (1) Dissolve 1g PVPK-30 and 5g SBA-15 in 90mL ethanol at 80°C to obtain solution A; dissolve 4g ammonium polyphosphate in 10mL water to obtain solution B; add solution A and solution B to the , condenser, thermometer and N 2 In a 250mL four-necked flask, 18g of styrene and 0.1g of initiator AIBN (azobisisobutyronitrile) were shaken and mixed evenly, and slowly dropped into the four-necked flask. Cool to room temperature to obtain an emulsion. Then carry out centrifugal sedimentation at a speed of 3500r / min, discard the supernatant, wash the lower layer of microspheres with absolute ethanol, and after ultrasonic dispersion, then centrifuge and wash, repeat this 5 times to remove unreacted substances; finally pour into the culture medium dish, and dried in a vacuum oven at 60°C for 8 hours to obtain a white powder product, namely polystyrene microspheres.

[0058] (2) Divide 50mL of n-heptane into the first part and the second part, the volume ratio of the first part an...

Embodiment 3

[0062] (1) Dissolve 3g PVPK-30 and 4g SBA-15 in 90mL ethanol at 60°C to obtain solution A; dissolve 1g ammonium polyphosphate in 10mL water to obtain solution B; add solution A and solution B to the , condenser, thermometer and N 2 In a 250mL four-necked flask, 19g of styrene and 0.3g of initiator AIBN (azobisisobutyronitrile) were shaken and mixed evenly, and slowly dropped into the four-necked flask. Cool to room temperature to obtain an emulsion. Then carry out centrifugal sedimentation at a speed of 3500r / min, discard the supernatant, wash the lower layer of microspheres with absolute ethanol, and after ultrasonic dispersion, then centrifuge and wash, repeat this 5 times to remove unreacted substances; finally pour into the culture medium dish, and dried in a vacuum oven at 60°C for 8 hours to obtain a white powder product, namely polystyrene microspheres.

[0063] (2) Divide 100mL of n-heptane into the first part and the second part, the volume ratio of the first part a...

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Abstract

The invention relates to a mesopore-micropore carbon micro sphere of high specific surface area for a super capacitor and a preparation method of the carbon micro sphere. A polystyrene micro sphere is prepared by using styrene as a monomer, SBA-15 as a mesopore template and ammonium polyphosphate as a multifunctional auxiliary agent; and the polystyrene micro sphere is crosslinked, carbonized and etched to obtain the polystyrene-based mesopore-micropore carbon micro sphere of the high specific surface area. The preparation method is characterized in that the ammonium polyphosphate serves as the multifunctional auxiliary agent, acid and alkali activation is not needed, and the N and P codoped mesopore-micropore carbon micro sphere of the high high specific surface area for the super capacitor can be obtained; the specific surface area of the material is 1168-1476m2/g, the pore volume is 1.069-1.341m3/g, and when the mesopore-micropore carbon micro sphere is used as the electrode material of the super capacitor, the specific capacitance in a water system electrolyte is 132.5-175F/g; and the mesopore-micropore carbon micro sphere is very suitable for serving as the electrode material of the super capacitor.

Description

technical field [0001] The invention belongs to the field of material technology, and in particular relates to a high specific surface area mesoporous-microporous carbon microsphere for a supercapacitor and a preparation method thereof. Background technique [0002] Supercapacitor is a new type of energy storage device between traditional capacitors and batteries. It has high power density, high energy density, fast charge and discharge speed, long cycle life, no pollution to the environment, wide operating temperature range and high safety performance. In recent years, it has attracted worldwide attention and has become one of the research hotspots in the field of new energy. The electrode material is one of the key factors determining the performance of supercapacitors, so the synthesis and optimization of high-performance electrode materials is the focus of supercapacitor research. The mesoporous-microporous carbon material, as a carbon material widely used in supercapac...

Claims

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Application Information

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IPC IPC(8): H01G11/86H01G11/26H01G11/42H01G11/34
CPCY02E60/13H01G11/86H01G11/26H01G11/34H01G11/42
Inventor 蔡江涛陈晨邱介山周安宁张亚婷
Owner XIAN UNIV OF SCI & TECH
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