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Method for preparing nickel-cobalt-phosphorus integrated electrode material having core-shell structure

A core-shell structure and electrode material technology, applied in the field of materials science, can solve the problems of unsatisfactory cycle performance of nickel-cobalt phosphide and limit the application of nickel-cobalt phosphide, so as to reduce electron transfer resistance, improve cycle performance, and increase utilization rate Effect

Active Publication Date: 2019-04-05
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the cycle performance of nickel-cobalt phosphide is not ideal, which limits the application of nickel-cobalt phosphide

Method used

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  • Method for preparing nickel-cobalt-phosphorus integrated electrode material having core-shell structure
  • Method for preparing nickel-cobalt-phosphorus integrated electrode material having core-shell structure
  • Method for preparing nickel-cobalt-phosphorus integrated electrode material having core-shell structure

Examples

Experimental program
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Effect test

Embodiment 1

[0027] (1) Take a carbon cloth with a size of 1 cm × 2 cm and put it in dilute hydrochloric acid, acetone, ethanol and deionized water for ultrasonic cleaning, and finally dry it in a vacuum oven at 60 ° C for 3 h for later use. The concentration of dilute hydrochloric acid is 3M.

[0028] (2) Get 1 mmol of nickel nitrate hexahydrate, 1 mmol of cobalt nitrate hexahydrate, and 3 mmol of urea, add together in the reactor that 40 ml of deionized water and 10 ml of ethanol mixed solution are housed, magnetically stir until A transparent pink solution was formed, and the carbon cloth was immersed in the solution; the reaction kettle was sealed, and the temperature was raised to 120° C. for 5 hours. After cooling to room temperature, the carbon cloth was taken out, placed in deionized water and absolute ethanol for ultrasonic cleaning several times, and dried in a vacuum oven at 60°C for 12 hours to obtain a carbon cloth with NiCo precursor nanowire array matrix grown on the surface...

Embodiment 2

[0033] (1) Take a carbon cloth with a size of 1 cm × 2 cm and put it in dilute hydrochloric acid, acetone, ethanol and deionized water for ultrasonic cleaning, and finally dry it in a vacuum oven at 60 ° C for 3 h for later use. The concentration of dilute hydrochloric acid is 3M.

[0034] (2) Get 2 millimoles of nickel nitrate hexahydrate, 2 millimoles of cobalt nitrate hexahydrate, and 4 millimoles of urea and add together in the reactor that the mixed solution of 20ml deionized water and 5ml ethanol is housed, and magnetically stir until A transparent pink solution was formed, and the carbon cloth was immersed in the solution; the reaction kettle was sealed, and the temperature was raised to 120° C. for 5 hours. After cooling to room temperature, the carbon cloth was taken out, placed in deionized water and absolute ethanol for ultrasonic cleaning several times, and dried in a vacuum oven at 60°C for 12 hours to obtain a carbon cloth with NiCo precursor nanowire array matri...

Embodiment 3

[0039] (1) Take a carbon cloth with a size of 1 cm × 2 cm and put it in dilute hydrochloric acid, acetone, ethanol and deionized water for ultrasonic cleaning, and finally dry it in a vacuum oven at 60 ° C for 3 h for later use. The concentration of dilute hydrochloric acid is 3M.

[0040] (2) Take 3 millimoles of nickel nitrate hexahydrate, 3 millimoles of cobalt nitrate hexahydrate, and 4.5 millimoles of urea and add them together to a reaction kettle equipped with a mixture of 60 ml of deionized water and 15 ml of ethanol, and stir magnetically until the mixture is formed. Transparent pink solution, immerse the carbon cloth in the solution; seal the reaction kettle, heat up to 120°C and react for 5 hours. After cooling to room temperature, the carbon cloth was taken out, placed in deionized water and absolute ethanol for ultrasonic cleaning several times, and dried in a vacuum oven at 60°C for 12 hours to obtain a carbon cloth with NiCo precursor nanowire array matrix grown...

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Abstract

The invention relates to a supercapacitor electrode material and aims to provide a method for preparing a nickel-cobalt-phosphorus integrated electrode material having a core-shell structure. The method comprises immersing a carbon cloth in a liquid having cobalt nitrate hexahydrate, nickel nitrate hexahydrate, urea, and ion water-ethanol mixed liquid to react; after the surface growth of NiCo precursor nanowire array substrate, immersing the carbon cloth in a liquid having the cobalt nitrate hexahydrate, the nickel nitrate hexahydrate, the hexamethylenetetramine, deionized water-ethanol mixedliquid to react; generating a high-temperature reaction in argon and sodium hypophosphite to obtain the nickel-cobalt-phosphorus integrated electrode material having a NiCoP@NiCoP core-shell structure on the surface. The material prepared by the method can be directly used as the electrode of a supercapacitor. The core-shell structure is disposed on the surface of the electrode material so as togreatly reduce the electron transfer resistance and improve the utilization rate of an active material, thereby further improving the electrode capacitance performance. The core-shell structure has aninternal space and a porous structure, can buffer the volume change of the active material in charging and discharging processes, improve structural stability, can improve the cycle performance.

Description

technical field [0001] The invention relates to a preparation method of a carbon cloth-based flexible supercapacitor electrode material, which belongs to the field of material science and technology. Background technique [0002] In recent years, with the rapid development of wearable electronic devices such as wearable display elements, artificial skin, and distributed sensors, flexible, lightweight, and portable electronic devices have become a research hotspot. The rise of flexible and wearable electronic devices has promoted the rapid development of flexible energy storage technologies. As the core part of flexible energy storage devices, the preparation and assembly of flexible electrodes directly determine the performance level of flexible energy storage devices. Traditional energy storage devices such as batteries have the disadvantage of short cycle life, and supercapacitors have advantages over batteries in terms of energy storage due to their better charge-dischar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/24H01G11/30H01G11/32H01G11/86
CPCH01G11/24H01G11/30H01G11/32H01G11/86Y02E60/13
Inventor 张启龙朱雨露杨辉宗泉
Owner ZHEJIANG UNIV
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