Method for preparing porous carbon/binary transition metal oxide microsphere material

A technology of transition metals and oxides, applied in the field of preparation of supercapacitor electrode materials, can solve the problems of complex preparation methods, low specific capacitance, poor cycle stability, etc., and achieve good dispersion, high specific capacity value, and improved electrochemical performance Effect

Inactive Publication Date: 2017-07-28
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the carbon and metal oxide composite materials prepared by the above method have disadvantages such as low specific capacitance, poor cycle stability or complicated preparation methods.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Measure according to the volume ratio of glycerin:isopropanol=1:3, mix well, then add Ni(NO 3 ) 2 ·6H 2 O:Co(NO 3 ) 2 ·6H 2 Add Ni(NO 3 ) 2 ·6H 2 O and Co(NO 3 ) 2 ·6H 2 O, after stirring the mixture to a pink transparent solution, press F127:Ni(NO 3 ) 2 ·6H 2 Add F127 at a mass ratio of O=1:9, and keep stirring until the white powder is completely dissolved in a transparent solution. Transfer to a 100mL reactor and heat at 180°C for 6h. The obtained product was washed several times with distilled water and ethanol, and dried at 80°C for 12h to obtain NiCo glyceride nanospheres. The NiCo glyceride nanospheres were calcined in a tube furnace fed with air from room temperature to 350 °C at a rate of 5 °C / min, then kept for 2 h, and finally cooled down to room temperature naturally, and the obtained black substance was binary transition metal oxide NiCo 2 o 4 . The binary transition metal oxide NiCo 2 o 4 Disperse in 0.05M glucose solution, pour it into ...

Embodiment 2

[0015] Measure according to the volume ratio of glycerin:isopropanol=1:4, mix well, and then use Ni(NO 3 ) 2 ·6H 2 O:Co(NO 3 ) 2 ·6H 2 Add Ni(NO 3 ) 2 ·6H 2 O and Co(NO 3 ) 2 ·6H 2 O, after stirring the mixture to a pink transparent solution, press F127:Ni(NO 3 ) 2 ·6H 2 Add F127 at a mass ratio of O=5:9, and keep stirring until the white powder is completely dissolved in a transparent solution. Transfer to a 100mL reactor and heat at 180°C for 6h. The obtained product was washed several times with distilled water and ethanol, and dried at 80°C for 12h to obtain NiCo glyceride nanospheres. NiCo glyceride nanospheres were calcined in a tube furnace fed with air from room temperature to 350 °C at a rate of 3 °C / min, then kept for 3 h, and finally cooled down to room temperature naturally. The black substance obtained was binary transition metal oxide NiCo 2 o 4 . NiCo 2 o 4 Dispersed in 0.05M glucose solution, poured into a 100mL reaction kettle and heated at ...

Embodiment 3

[0017] Measure by the volume ratio of glycerin: isopropanol=1:5, mix well, then add Ni(NO 3 )2 ·6H 2 O:Co(NO 3 ) 2 ·6H 2 Add Ni(NO 3 ) 2 ·6H 2 O and Co(NO 3 ) 2 ·6H 2 O, after stirring the mixture to a pink transparent solution, press F127:Ni(NO 3 ) 2 ·6H 2 Add F127 at a mass ratio of O=10:9, and keep stirring until the white powder is completely dissolved in a transparent solution. Transfer to a 100mL reactor and heat at 180°C for 6h. The obtained product was washed several times with distilled water and ethanol, and dried at 80°C for 12h to obtain NiCo glyceride nanospheres. NiCo glyceride nanospheres were calcined in a tube furnace fed with air from room temperature to 350 °C at a rate of 1 °C / min, then kept for 4 hours, and finally cooled down to room temperature naturally. The black substance obtained was binary transition metal oxide NiCo 2 o 4 . NiCo 2 o 4 Dispersed in 0.05M glucose solution, poured into a 100mL reaction kettle and heated at 170°C for ...

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Abstract

The invention relates to a method for preparing a porous carbon/binary transition metal oxide nanosphere material. The method includes the steps of mixing glycerol and isopropyl alcohol according to a volume ratio of glycerol: isopropyl alcohol = 1: 3 to 5, adding Ni(NO3)2<separateion dot>6H2O and Co(NO3)2<separateion dot>6H2O according to a mass ratio of Ni(NO3)2<separateion dot>6H2O: Co(NO3)2<separateion dot>6H2O: glycerol = 1: 2: 250, stirring into a pink transparent solution, adding F127 according to a mass ratio of F127: Ni(NO3)2<separateion dot>6H2O = 1 to 20: 9, stirring until the white powder is completely dissolved in the transparent solution, conducting hydrothermal treatment at 180 DEC C for 6h, and obtaining NiCo glyceride nanospheres; after washing and drying, heating the NiCo glyceride nanospheres in a tube furnace injected with air from the room temperature to 350 DEG C at a heating rate of 0.5 to 5 DEG C/min, maintaining the constant temperature for 2-4h, and obtaining binary transition metal oxide NiCo2O4 nanospheres; and dispersing in a 0.05 M glucose solution, conducting hydrothermal treatment at 170 DEC C for 4h, after washing and drying, conducting carbonization in a nitrogen atmosphere for 4 to 6 hours, and obtaining porous carbon/binary transition metal oxide nanospheres via natural cooling. The method of the invention has the advantage of simple process, and the obtained porous carbon/binary metal oxide nanospheres exhibit a high specific capacity value and a long stable cycle life as a supercapacitor electrode material.

Description

technical field [0001] The invention relates to a method for preparing a supercapacitor electrode material porous carbon / binary transition metal oxide nanosphere material, and belongs to the technical field of preparation of supercapacitor electrode materials. Background technique [0002] Supercapacitors have higher specific capacitance, and the specific capacitance that can be stored is more than ten times that of traditional capacitors; compared with batteries, they have higher specific power, can instantly release large currents, and have short charging time and high charging efficiency. High, long cycle life, no memory effect, and basically maintenance-free, it fills the gap between traditional capacitors and batteries. , aerospace and national defense technology and other aspects have extremely important and broad application prospects. In supercapacitors, the electrode material is the key factor, which determines the main performance indicators of the capacitor, so t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/86H01G11/46H01G11/32H01G11/24B82Y30/00
CPCY02E60/13H01G11/86B82Y30/00H01G11/24H01G11/32H01G11/46
Inventor 徐子颉耿瑞
Owner TONGJI UNIV
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