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Nickel cobaltate/nickel cobalt sulfide nanocomposite of rodlike core-shell structure, preparation method and application

A nano-composite material and core-shell structure technology, which is applied in the field of material preparation, can solve the problems of unsatisfactory specific capacitance, energy density or cycle charge-discharge performance of electrode material composite materials, and achieve rich redox characteristics, easy promotion, Simple to use effects

Inactive Publication Date: 2017-06-27
ANHUI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, currently disclosed single electrode materials such as NiCo 2 o 4 or NiCo 2 S 4 Or the performance of composite materials such as specific capacitance, energy density or cycle charge and discharge performance is not ideal

Method used

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  • Nickel cobaltate/nickel cobalt sulfide nanocomposite of rodlike core-shell structure, preparation method and application
  • Nickel cobaltate/nickel cobalt sulfide nanocomposite of rodlike core-shell structure, preparation method and application
  • Nickel cobaltate/nickel cobalt sulfide nanocomposite of rodlike core-shell structure, preparation method and application

Examples

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Embodiment 1

[0051] A method for preparing a nickel cobaltate / cobalt nickel sulfide nanocomposite material with a rod-shaped core-shell structure, comprising the following steps:

[0052] A, nickel chloride, cobalt chloride and urea are added in 40 milliliters of water respectively, stir and make it dissolve, form transparent solution, the concentration of nickel salt in the solution is 0.04 mol / liter, the concentration of cobalt salt is 0.08 mol / liter, urea The concentration is 0.32 mol / liter, and the solution is transferred to a stainless steel autoclave with a Teflon lining of 50 milliliters, and then a small piece of clean foam nickel (2 cm × 2 cm) is immersed in the mixed solution, and reacted at 120 ° C for 6 hour, after cooling, take out the nickel foam sheet, wash it up, dry, and make the precursor;

[0053] B. Put the precursor in a muffle furnace and calcine at 380°C for 2 hours to obtain NiCo 2 o 4 Nano stave.

[0054] C, 25 milliliters of 0.2 mol / liter sodium sulfide solutio...

Embodiment 2

[0058] A method for preparing a nickel cobaltate / cobalt nickel sulfide nanocomposite material with a rod-shaped core-shell structure, comprising the following steps:

[0059] A, nickel chloride, cobalt chloride and urea are added into 40 milliliters of water respectively, stir to make it dissolve, form transparent solution, the concentration of nickel salt in the solution is 0.01 mol / liter, the concentration of cobalt salt is 0.02 mol / liter, urea The concentration is 0.06 mol / liter, and the solution is transferred to a stainless steel autoclave with a Teflon lining of 50 milliliters, and then a small piece of clean foam nickel (2 cm × 2 cm) is immersed in the mixed solution, and reacted at 140 ° C for 4 hour, after cooling, take out the nickel foam sheet, wash it up, dry, and make the precursor;

[0060] B. Put the precursor in a muffle furnace and calcinate at 400°C for 1 hour to obtain NiCo 2 o 4 Nano stave.

[0061] C, 25 milliliters of 0.02 mol / liter sodium sulfide solu...

Embodiment 3

[0065] A method for preparing a nickel cobaltate / cobalt nickel sulfide nanocomposite material with a rod-shaped core-shell structure, comprising the following steps:

[0066] A, nickel chloride, cobalt chloride and urea are added in 40 milliliters of water respectively, stir to make it dissolve, form transparent solution, the concentration of nickel salt in the solution is 0.1 mol / liter, the concentration of cobalt salt is 0.2 mol / liter, urea The concentration is 0.6 mol / liter, and the solution is transferred to a stainless steel autoclave with a Teflon lining of 50 ml, and then a small piece of clean foam nickel (2 cm × 2 cm) is immersed in the mixed solution, and reacted at 100 ° C for 10 hour, after cooling, take out the nickel foam sheet, wash it up, dry, and make the precursor;

[0067] B. Put the precursor in a muffle furnace and calcinate at 300°C for 4 hours to obtain NiCo 2 o 4 Nano stave.

[0068] C, 25 milliliters of 0.1 mol / liter sodium sulfide solution is added...

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Abstract

The invention provides a nickel cobaltate / nickel cobalt sulfide nanocomposite of a rodlike core-shell structure, a preparation method and application. Compared with the prior art, a gaseous phase hydrothermal method is utilized, in the prepared core-shell structure nanocomposite, the core is a NiCo2O4 nanorod, and the shell is NiCo2S4 nanosheets; and the NiCo2S4 nanosheets grow outside as the shell, have a relatively large superficial area, has excellent conductivity and an abundant oxidoreduction characteristic, and thus can provide excellent electrochemical performance. The NiCo2O4 nanorod serves as the core, apart from being capable of participating electrochemical energy storage, can also effectively provide support for the NiCo2S4 nanosheets, and prevent nanosheets from being superimposed together and influencing full play of the electrochemical performance. In addition, the preparation method is simple to operate, does not need special equipment, and thus is easy to popularize.

Description

technical field [0001] The invention belongs to the field of material preparation, and in particular relates to a nickel cobaltate / cobalt nickel sulfide nanocomposite material with a rod-shaped core-shell structure, a preparation method and an application thereof. Background technique [0002] Supercapacitors, also known as electrochemical capacitors, are a new type of energy storage device between secondary batteries and traditional electrostatic capacitors. Compared with other chemical power sources, supercapacitors have the advantages of high energy density, long service life, fast charging speed, and wide operating temperature range. Electrode materials are one of the core factors that affect the performance of electrochemical capacitors, and are currently a hot spot in the research of electrochemical capacitors. From the perspective of electrode materials, the electrode materials used in electrochemical capacitors mainly include: carbon-based materials, metal oxide-bas...

Claims

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Application Information

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IPC IPC(8): H01G11/86H01G11/30H01G11/24B82Y30/00B82Y40/00C01G53/00
CPCY02E60/13H01G11/86B82Y30/00B82Y40/00C01G53/006C01P2004/03C01P2006/40H01G11/24H01G11/30
Inventor 王正华荣恒
Owner ANHUI NORMAL UNIV
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