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Nickel-cobalt double hydroxide/nitrogenous carbon nanohorn composite material used for supercapacitor and preparation method for composite material

A double hydroxide and supercapacitor technology, applied in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor electrodes, etc., can solve the problems of low product purity, difficult to control nitrogen content, and low nitrogen content in products, and achieve nitrogen The effect of rich content, good conductivity, and large specific surface area

Active Publication Date: 2016-09-07
上海韵申新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the prior art, by reacting carbon nanohorns with urea, or calcining carbon nanohorns in an ammonia atmosphere, the nitrogen element is grafted onto carbon nanohorns to obtain nitrogen-containing carbon nanohorns, but this The nitrogen content of the product obtained by the preparation process is very low (less than 5%), the nitrogen content is difficult to control, and the product purity is very low

Method used

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  • Nickel-cobalt double hydroxide/nitrogenous carbon nanohorn composite material used for supercapacitor and preparation method for composite material
  • Nickel-cobalt double hydroxide/nitrogenous carbon nanohorn composite material used for supercapacitor and preparation method for composite material
  • Nickel-cobalt double hydroxide/nitrogenous carbon nanohorn composite material used for supercapacitor and preparation method for composite material

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Embodiment 1

[0028] First, disperse 10g of high-purity graphite powder evenly into excess dicyandiamide aqueous solution, stir for 3 hours, then rotate the solvent at 60°C, then heat-treat at 1273K for 2 hours under an argon atmosphere, then wash with distilled water and filter And vacuum drying under 60 ℃, obtain nitrogen-containing graphite powder; Add sodium dodecylbenzenesulfonate and stir in this nitrogen-containing graphite powder again, and the mixing amount is 25% of nitrogen-containing graphite powder weight, will obtain The doped nitrogen-containing graphite powder was used as the cathode and the anode respectively, and was prepared by hydrogen arc method (current 500A, gas pressure 0.08MPa, volume ratio of helium and hydrogen 2:1) under the mixed atmosphere of helium and hydrogen. Solid product, then add 50mL of water and undergo ultrasonic oscillation, filtration, pickling, water washing and drying operations to obtain pure nitrogen-containing carbon nanohorns with a nitrogen co...

Embodiment 2

[0037] First, 10g of high-purity graphite powder was uniformly dispersed in dicyandiamide aqueous solution, stirred for 3h, then the solvent was evaporated at 60°C, and then heat-treated at 673K ​​for 0.5h under an argon atmosphere, followed by distilled water washing, filtration and Vacuum drying at 60°C to obtain nitrogen-containing graphite powder. Then use the nitrogen-containing graphite powder as the cathode and anode respectively, under the mixed atmosphere of helium and hydrogen, adopt the hydrogen arc method (current 500A, gas pressure 0.08MPa, volume ratio of helium and hydrogen is 2:1) to prepare a solid product , and then add 50mL of water and undergo ultrasonic oscillation, filtration, pickling, water washing and drying operations to obtain pure nitrogen-containing carbon nanohorns with a nitrogen content of 1%; 0.1mol nickel nitrate and 0.4mol cobalt nitrate are dissolved in water -In the mixed solvent of ethanol (volume ratio 5:1), add 5 mol of the above-mention...

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Abstract

The invention belongs to the field of a new energy material, and relates to a nickel-cobalt double hydroxide / nitrogenous carbon nanohorn composite material used for a supercapacitor and a preparation method for the composite material. The composite material is prepared from the nickel-cobalt double hydroxide and the nitrogenous carbon nanohorn in a compounding manner; the preparation process comprises the steps of preparing the nitrogenous carbon nanohorn firstly by adopting a hydrogen arc method; then preparing a mixed solvent of water and ethanol, adding nickel nitrate and cobalt nitrate to the mixed solvent, adding urea to be used as an alkali source, and carrying out uniform ultrasonic dispersion to obtain a dual-metal-salt solution; and finally, adding the nitrogenous carbon nanohorn to the dual-metal-salt solution, carrying out uniform ultrasonic dispersion and then implementing a microwave hydrothermal reaction, and next, carrying out suction filtration, washing, drying and grinding on the prepared precipitates to obtain the nickel-cobalt double hydroxide / nitrogenous carbon nanohorn composite material.

Description

technical field [0001] The invention belongs to the field of new energy materials, and relates to a nickel-cobalt double hydroxide / nitrogen-containing carbon nanohorn composite material for supercapacitors and a preparation method thereof. Background technique [0002] With the rapid development of the economy, energy and environmental problems are becoming more and more serious, so finding efficient and environmentally friendly energy storage devices has become a top priority. As a new type of energy storage device, supercapacitor has the advantages of high power density, long cycle life, high charging efficiency and environmental friendliness. It is expected to be widely used in convenient electronic equipment, electric vehicles and other fields, but its energy density is low, so the research has Substances with high specific capacitance characteristics are very important as electrode materials for supercapacitors. [0003] Metal hydroxides have the advantages of high the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/24H01G11/30H01G11/46H01G11/36H01G11/86
CPCY02E60/13H01G11/24H01G11/30H01G11/36H01G11/46H01G11/86
Inventor 许娟居正伟陈智栋曹剑瑜
Owner 上海韵申新能源科技有限公司
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