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Super capacitor electrode material Zn doping NiCo2O4 compound and preparation method

A technology for supercapacitors and electrode materials, applied in the direction of hybrid capacitor electrodes, nanotechnology, etc., can solve the problems that electrode materials need to be further improved, and achieve the effects of improving electrochemical performance, easy process control, and simple operation

Inactive Publication Date: 2017-10-10
SHANGHAI UNIV OF ENG SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But a single NiCo 2 o 4 or ZnCo 2 o 4 The performance of electrode materials still needs to be further improved

Method used

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  • Super capacitor electrode material Zn doping NiCo2O4 compound and preparation method

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Experimental program
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Embodiment 1

[0023] 1) Weigh 1mmol nickel nitrate hexahydrate (Ni(NO 3 ) 2 ·6H 2 O), 2mmol cobalt nitrate hexahydrate (Co(NO 3 ) 2 ·6H 2 O), 0.75mmol zinc nitrate hexahydrate (Zn(NO 3 ) 2 ·6H 2 O), 10mmol ammonium fluoride (NH 4 F) and 15mmol of urea, dissolved in 50mL of water, and fully stirred to obtain a mixed solution.

[0024] 2) Pour the mixed solution obtained in step 1) into a polytetrafluoroethylene hydrothermal reaction kettle and put a piece of cleaned foamed nickel, put the reaction kettle into a blast drying oven, and react under 120°C hydrothermal conditions for 12 Hours, after the reaction, the reactor was cooled to room temperature, and the nickel foam with the precursor was taken out, washed with deionized water and ethanol respectively, and dried.

[0025] 3) Calcining the nickel foam with the precursor in the muffle furnace, the calcination temperature is 300°C, and the time is 2 hours, the precursor attached to the foam nickel is converted into Zn-doped NiCo b...

Embodiment 2

[0027] 1) Weigh 1mmol nickel nitrate hexahydrate (Ni(NO 3 ) 2 ·6H 2 O), 2mmol cobalt nitrate hexahydrate (Co(NO 3 ) 2 ·6H 2 O), 0.1mmol zinc nitrate hexahydrate (Zn(NO 3 ) 2 ·6H 2 O), 5mmol ammonium fluoride (NH 4 F) and 30mmol of urea were dissolved in 50mL of water, and fully stirred to obtain a mixed solution.

[0028] 2) Pour the mixed solution obtained in step 1) into a polytetrafluoroethylene hydrothermal reaction kettle and put a piece of cleaned carbon cloth, put the reaction kettle into a blast drying oven, and react under 150°C hydrothermal conditions for 3 Hours, after the reaction, the reactor was cooled to room temperature, and the nickel foam with the precursor was taken out, washed with deionized water and ethanol respectively, and dried.

[0029] 3) Calcining the nickel foam with the precursor in the muffle furnace, the calcination temperature is 450 °C, and the time is 2 hours, the precursor attached to the foam nickel is converted into Zn-doped NiCo ...

Embodiment 3

[0031] 1) Weigh 1mmol nickel nitrate hexahydrate (Ni(NO 3 ) 2 ·6H 2 O), 2mmol cobalt nitrate hexahydrate (Co(NO 3 ) 2 ·6H 2 O), 1mmol zinc nitrate hexahydrate (Zn(NO 3 ) 2 ·6H 2 O), 20mmol ammonium fluoride (NH 4 F) and 5mmol of urea were dissolved in 50mL of water, and fully stirred to obtain a mixed solution.

[0032] 2) Pour the mixed solution obtained in step 1) into a polytetrafluoroethylene hydrothermal reaction kettle and put a piece of cleaned carbon fiber paper, put the reaction kettle into a blast drying oven, and react for 20 Hours, after the reaction, the reactor was cooled to room temperature, and the nickel foam with the precursor was taken out, washed with deionized water and ethanol respectively, and dried.

[0033] 3) Calcining the nickel foam with the precursor in the muffle furnace, the calcination temperature is 250 ° C, and the time is 10 hours, the precursor attached to the foam nickel is converted into Zn-doped NiCo by calcination 2 o 4 Comple...

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Abstract

The invention relates to a super capacitor electrode material Zn doping NiCo2O4 compound and a preparation method; the method comprises the following steps: 1, allowing a mixed solution containing zinc nitrate, nickel nitrate, cobalt nitrate, ammonium fluoride and urea to be subjected to hydro-thermal reaction with a conductive substrate, thus obtaining the conductive substrate with an attached precursor, wherein the zinc nitrate, nickel nitrate and cobalt nitrate mol ratio is 0.1-1:1:2; 2, calcining the conductive substrate with the attached precursor, and allowing the precursor attached to the conductive substrate to turn to the Zn doping NiCo2O4 compound through calcinations. The material has the netted nanometer sheet array formed by mutually interpenetrating and braiding nano wires, and has a highly porous structure to infiltrate an electrolyte, thus improving the electrochemistry performance; the Zn doping content can be adjusted to change the electrochemistry performance.

Description

technical field [0001] The invention relates to a supercapacitor electrode material Zn-doped NiCo 2 o 4 Composite and preparation method. technical background [0002] Supercapacitors, which are widely studied at present, have become an energy storage device with important development prospects due to their advantages such as high specific capacitance, long cycle life, fast charge-discharge rate, and safety. However, compared with batteries and fuel cells, the low energy density of supercapacitors severely restricts their future large-area practical applications. [0003] Studies have shown that the development of new, high-performance electrode materials is an effective way to increase the energy density of supercapacitors. NiCo 2 o 4 and ZnCo 2 o 4 Bimetallic oxides such as bimetallic oxides have been considered as a new class of high-performance electrode materials due to their high electrical conductivity and multiple oxidation states for Faradaic reversible react...

Claims

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Application Information

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IPC IPC(8): H01G11/24H01G11/46B82Y40/00
CPCY02E60/13H01G11/24B82Y40/00H01G11/46
Inventor 杨方李文尧刘锡建
Owner SHANGHAI UNIV OF ENG SCI
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