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Preparation method and application of glucose-based porous carbon supercapacitor electrode material

A technology for supercapacitors and electrode materials, applied in hybrid capacitor electrodes, chemical instruments and methods, carbon compounds, etc., to achieve the effects of stable structure, simple preparation process, and high specific capacitance

Active Publication Date: 2017-05-31
江苏锦记智能电气科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when the phosphorus-doped porous carbon material obtained by this method is used as an electrode material, the specific capacitance is low. When 1mol / L of H 2 SO 4 It is an electrolyte, and the specific capacitance is only 320F / g when the constant current discharge current density is 0.1A / g

Method used

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  • Preparation method and application of glucose-based porous carbon supercapacitor electrode material
  • Preparation method and application of glucose-based porous carbon supercapacitor electrode material
  • Preparation method and application of glucose-based porous carbon supercapacitor electrode material

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Effect test

Embodiment 1

[0031] 8.9g of glucose, 0.188g of thiourea and 0.2g of sodium lauryl sulfate were dissolved in 100ml of distilled water, ultrasonicated for 5min, and then transferred to a polytetrafluoroethylene reactor, at 180 o C hydrothermal reaction 4h; After filtering, washing with distilled water and ethanol three times respectively, then at 40 o Drying at C for 8h to obtain a glucose-based carbon material; the mol ratio of the glucose, thiourea and sodium lauryl sulfate is 20:1:0.28;

[0032] 0.05g of glucose-based carbon material was impregnated in 2.5g of 2wt% KOH solution for 24h, dried, and then heated at 750°C under the protection of argon. o C was activated for 3h, and naturally cooled to room temperature; wherein, the mass ratio of glucose-based carbon material to KOH was 1:1;

[0033] The product obtained above was washed with dilute acid solution, then washed to neutrality with distilled water; o After drying at C for 10 h, the glucose-based porous carbon supercapacitor elec...

Embodiment 2

[0040] Dissolve 8.9g of glucose, 0.188g of thiourea and 0.2g of sodium lauryl sulfate in 100ml of distilled water, the molar ratio of glucose to thiourea is 20:1, sonicate for 5min, and then transfer to a polytetrafluoroethylene reactor , at 180 o C hydrothermal reaction 4h; After filtering, washing with distilled water and ethanol three times respectively, then at 40 oDrying at C for 8h to obtain a glucose-based carbon material; the mol ratio of the glucose, thiourea and sodium lauryl sulfate is 20:1:0.28;

[0041] 0.05g of glucose-based carbon material was impregnated in 5g of 2wt% KOH solution for 24h, dried, and then heated at 750°C under the protection of argon. o C was activated for 3h, and naturally cooled to room temperature; wherein, the mass ratio of glucose-based carbon material to KOH was 0.5:1;

[0042] The product obtained above was washed with dilute acid solution, then washed to neutrality with distilled water; o After drying at C for 10 h, the glucose-based...

Embodiment 3

[0045] Dissolve 8.9g of glucose, 0.188g of thiourea and 0.2g of sodium lauryl sulfate in 100ml of distilled water, the molar ratio of glucose to thiourea is 20:1, sonicate for 5min, and then transfer to a polytetrafluoroethylene reactor , at 180 o C hydrothermal reaction 4h; After filtering, washing with distilled water and ethanol three times respectively, then at 40 o Drying at C for 8h to obtain a glucose-based carbon material; the mol ratio of the glucose, thiourea and sodium lauryl sulfate is 20:1:0.28;

[0046] 0.05g of glucose-based carbon material was impregnated in 1.25g of 2wt% KOH solution for 24h, dried, and then heated at 750°C under the protection of argon. o C was activated for 3h, and naturally cooled to room temperature; wherein, the mass ratio of glucose-based carbon material to KOH was 2:1;

[0047] The product obtained was washed with dilute acid solution, then washed to neutrality with distilled water; o After drying at C for 10 h, the glucose-based por...

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Abstract

The invention relates to a preparation method and application of a glucose-based porous carbon supercapacitor electrode material. The preparation method includes the following steps that glucose, thiourea and lauryl sodium sulfate are dissolved in 100 ml of water, ultrasonic treatment is conducted for 5 min, and then the mixture is transferred into a polytetrafluoroethylene reaction kettle for a hydrothermal reaction; the obtained product is washed three times with distilled water and alcohol, dried and activated with KOH at 650-850 DEG C; the obtained activated product is washed with a diluted acid solution and then washed with distilled water to be neutral, and the glucose-based porous carbon supercapacitor electrode material is finally obtained after drying. The preparation process is simple, and the preparation method is controllable. The prepared glucose-based porous carbon supercapacitor electrode material has the advantages of being stable in structure, excellent in electrochemical property, good in circulating property, high in specific capacitance and the like, and is very suitable for serving as the electrode material to be applied to the supercapacitor field.

Description

technical field [0001] The invention belongs to the technical field of new energy electronic materials, and relates to a preparation method and application of a glucose-based porous carbon supercapacitor electrode material. Background technique [0002] Glucose is the most widely distributed and most important monosaccharide in nature. It is a polyhydroxy aldehyde and can be used as a carbon precursor to prepare activated carbon materials. Yang et al. obtained a lithium-ion battery material with relatively good electrical properties by combining graphene and glucose spheres. At a charge-discharge current density of 5A / g, the reversible specific capacity can reach up to 925mAh / g (Yongqiang Yang, Ruiqing Pang , Xuejiao Zhou, Yan Zhang, Haixia Wu, Shouwu Guo, Composites of chemically-reduced graphene oxide sheets and carbon nanospheres with three-dimensional network structure as anode materials for lithium ion batteries, Journal of Materials Chemistry, 2012, 22-23200). Wu et a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/30H01G11/24H01G11/34H01G11/44C01B32/318C01B32/348
CPCY02E60/13H01G11/30C01P2004/03C01P2004/04C01P2006/40H01G11/24H01G11/34H01G11/44
Inventor 李梅相世森常成帅
Owner 江苏锦记智能电气科技有限公司
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