Preparation method and application of oxygen-doped cobalt nickel phosphide-reduced graphene oxide composite material

A composite material, cobalt phosphide technology, applied in the field of composite materials, can solve the problems affecting the performance of electrode materials, poor electrochemical performance of materials, etc., and achieve the effect of improving transfer efficiency, excellent electrochemical performance, and small particle size

Active Publication Date: 2020-04-17
CHINA UNIV OF GEOSCIENCES (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for cobalt nickel phosphide material, because its surface potential in the solvent is the same as that of graphene oxide, only simple mechanical mixing and compounding will lead to the delamination of graphene oxide and cobalt nickel phosphide, resulting in the material Poor electrochemical performance seriously affects its performance as an electrode material

Method used

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  • Preparation method and application of oxygen-doped cobalt nickel phosphide-reduced graphene oxide composite material
  • Preparation method and application of oxygen-doped cobalt nickel phosphide-reduced graphene oxide composite material
  • Preparation method and application of oxygen-doped cobalt nickel phosphide-reduced graphene oxide composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Evenly disperse 0.02mol cobalt nitrate hexahydrate and 0.02mol nickel nitrate hexahydrate in 20ml deionized water, stir for 60 minutes and put them into a blast oven for drying. When the liquid is dried until it still has fluidity, transfer it to put the corundum crucible into a muffle furnace at a heating rate of 10°C, raise the temperature to 500°C and keep it warm for 2 hours, and collect nickel-cobalt oxide after natural cooling.

[0058] Disperse 0.01mol of nickel-cobalt oxide and 0.045mol of sodium hypophosphite in both ends of the corundum magnetic boat, put the sodium hypophosphite in the direction of the upper air outlet, and carry out the phosphating reaction at 300°C for 1 hour under the protection of argon. The obtained product was washed with deionized water and ethanol, centrifuged, and vacuum-dried at a low temperature of 60° C. for 10 hours to obtain an oxygen-doped cobalt-nickel phosphide material.

[0059] Mix and stir 150 mg of oxygen-doped nickel-cob...

Embodiment 2

[0071] Evenly disperse 0.04mol cobalt nitrate hexahydrate and 0.02mol nickel nitrate hexahydrate in 20ml deionized water, stir for 60 minutes and put them into a blast oven for drying. When the liquid is dried until it still has fluidity, transfer it to put the corundum crucible into a muffle furnace at a heating rate of 10°C, raise the temperature to 500°C and keep it warm for 2 hours, and collect nickel-cobalt oxide after natural cooling.

[0072] Disperse 0.01mol of nickel-cobalt oxide and 0.045mol of sodium hypophosphite in both ends of the corundum magnetic boat, place the sodium hypophosphite in the direction of the upwind port, and carry out the phosphating reaction at 28°C for 1 hour under the protection of argon. The obtained product was washed with deionized water and ethanol, centrifuged, and vacuum-dried at a low temperature of 60° C. for 10 hours to obtain an oxygen-doped cobalt-nickel phosphide material.

[0073] Mix 150mg of oxygen-doped nickel-cobalt oxide comp...

Embodiment 3

[0076] Evenly disperse 0.02mol cobalt nitrate hexahydrate and 0.03mol nickel nitrate hexahydrate in 20ml deionized water, stir for 60 minutes and put them into a blast oven for drying. When the liquid is dried until it still has fluidity, transfer it to put the corundum crucible into a muffle furnace at a heating rate of 10°C, raise the temperature to 500°C and keep it warm for 2 hours, and collect nickel-cobalt oxide after natural cooling.

[0077] Disperse 0.01mol of nickel-cobalt oxide and 0.045mol of sodium hypophosphite in both ends of the corundum magnetic boat, put the sodium hypophosphite in the direction of the upper air outlet, and carry out the phosphating reaction at 300°C for 1 hour under the protection of argon. The obtained product was washed with deionized water and ethanol, centrifuged, and vacuum-dried at a low temperature of 60° C. for 10 hours to obtain an oxygen-doped cobalt-nickel phosphide material.

[0078] Mix 150 mg of oxygen-doped nickel-cobalt oxide...

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Abstract

The invention belongs to the technical field of composite materials, particularly relates to an oxygen-doped cobalt nickel phosphate-reduction oxygen graphene composite material, and further disclosesapplication of an electrode material of a supercapacitor. In the oxygen-doped cobalt nickel phosphate-reduction oxygen graphene composite material, an oxygen-doped cobalt nickel phosphate electrode material with small grain size and large specific area is effectively prepared by decomposition of sodium hypophosphite in medium and low temperatures, the surface potential is effectively adjusted bymodification, so that tight and uniform recombination with graphene oxide is achieved, the oxygen-doped cobalt nickel phosphate-reduction oxygen graphene composite material is prepared, the oxygen-doped cobalt nickel phosphate-reduction oxygen graphene composite material is richer in surface holes, smaller in grain size of active material and more excellent in electrochemical performance, excellent specific capacitance, charge-discharge cycle stability and rate performance are shown when the oxygen-doped cobalt nickel phosphate-reduction oxygen graphene composite material is used as the supercapacitor electrode material, and the specific capacitance and the charge-discharge cycle stability of the supercapacitor can be remarkably improved.

Description

technical field [0001] The invention belongs to the technical field of composite materials, in particular to a method for preparing an oxygen-doped cobalt-nickel phosphide-reduced graphene oxide composite material, and further discloses its use in preparing electrode materials for supercapacitors. Background technique [0002] With the growth of the global population and the continuous development of the economy, human society has an increasing demand for energy. The use of traditional fossil energy will cause serious environmental problems, limit the sustainable development of the global economy and society, and make traditional energy unable to meet the needs of social and economic development. Therefore, the development of efficient and clean renewable energy and environmentally friendly systems for new energy conversion storage devices is one of the current challenges and urgent issues to be solved. [0003] At present, various new energy conversion and storage systems ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/24H01G11/30H01G11/36H01G11/86
CPCH01G11/24H01G11/30H01G11/36H01G11/86Y02E60/13
Inventor 孙黎张元星张以河
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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