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Nickel-cobalt hydroxide composite material, preparation method thereof and supercapacitor

A technology of nickel-cobalt hydroxide and composite materials, applied in the field of nanomaterials

Active Publication Date: 2021-05-18
SHENZHEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to provide a nickel-cobalt hydroxide composite material and its preparation method and supercapacitor, aiming at solving the problem of how to improve the electrochemical performance of the nickel-cobalt hydroxide composite material

Method used

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  • Nickel-cobalt hydroxide composite material, preparation method thereof and supercapacitor
  • Nickel-cobalt hydroxide composite material, preparation method thereof and supercapacitor
  • Nickel-cobalt hydroxide composite material, preparation method thereof and supercapacitor

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[0024] On the one hand, the embodiment of the present invention provides a kind of preparation method of nickel-cobalt hydroxide composite material, such as figure 1 Shown, this preparation method comprises the steps:

[0025] S01: providing a first nickel material and a second nickel material; wherein, the first nickel material is nickel foam;

[0026] S02: Prepare electrolyte solution containing cobalt salt, nickel salt and precipitant;

[0027] S03: Place the first nickel material and the second nickel material in the electrolyte, use the first nickel material as a cathode and the second nickel material as an anode, and conduct electrolysis under microwave hydrothermal conditions. Deposition treatment, growing the nickel-cobalt hydroxide composite material on the surface of the first nickel material.

[0028] The preparation method of the nickel-cobalt hydroxide composite material provided in the embodiment of the present invention is a method of in-situ generating a nick...

Embodiment 1

[0052] A device for preparing nickel-cobalt hydroxide composite materials, such as figure 2 As shown, the device includes: a microwave generator switch 1, a power regulator 2, a temperature regulator 3, a real-time display 4, a thermocouple 5, a reactor 6, a barometer 7, a nut 8, and a current terminal 9.

[0053] The device has five functions of microwave, hydrothermal, electrodeposition, and auxiliary circulating cooling and temperature control device. In the closed deposition space formed, the microwave generator generates microwave radiation and is installed in the reaction chamber (ie, the reaction kettle). The liquid-phase conductive medium acts on the liquid-phase conductive medium, and makes the liquid-phase conductive medium heat, and measures and monitors the reaction temperature in the sealed tank and the temperature of the tank wall through the temperature measuring element, and feeds back to the external switch control device to realize the effective self-control ...

Embodiment 2

[0055] A preparation method of nickel-cobalt hydroxide composite material, comprising the steps of:

[0056] Step S11: Provide nickel foam and nickel sheet: cut 10mm×10mm nickel foam, cut 10mm×10mm nickel sheet, and ultrasonically clean the nickel foam and nickel sheet with acetone, ethanol and deionized water for 5 minutes respectively;

[0057] Step S12: Preparation of electrolyte: 3 grams of cobalt nitrate hexahydrate, 1.05 grams of nickel chloride hexahydrate and 0.8 grams of urea were used as solutes, and 1 L of distilled water was used as a solvent. The four were mixed and stirred for 30 minutes to make 3 grams of cobalt nitrate hexahydrate and 1.05 1 g of nickel chloride hexahydrate and 0.8 g of urea were completely dissolved in 1 L of distilled water.

[0058] Step S13: Put the electrolyte solution prepared in step S12 into the chamber of the reactor of the microwave hydrothermal electrodeposition system. The 10mm×10mm nickel foam cleaned in step S11 is used as the ca...

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Abstract

The invention belongs to the technical field of nano materials, and particularly relates to a nickel-cobalt hydroxide composite material, and a preparation method thereof and a supercapacitor. The preparation method of the nickel-cobalt hydroxide composite material comprises the following steps: providing a first nickel material and a second nickel material, wherein the first nickel material is foamed nickel; preparing an electrolyte containing cobalt salt, nickel salt and a precipitator; and placing the first nickel material and the second nickel material in the electrolyte, wherein the first nickel material serves as a cathode, the second nickel material serves as an anode, electro-deposition treatment is carried out under the microwave hydrothermal condition, and the nickel-cobalt hydroxide composite material grows on the surface of the first nickel material. The preparation method is accurate and stable in reaction condition, and the prepared nickel-cobalt hydroxide composite material is uniform in surface appearance and rich in structure and has good specific capacitance and cycle performance when being used as an electrode material, so that the nickel-cobalt hydroxide composite material has good application prospects in supercapacitors.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials, and in particular relates to a nickel-cobalt hydroxide composite material, a preparation method thereof, and a supercapacitor. Background technique [0002] Supercapacitor is a new type of energy storage device, which has the characteristics of high power density, short charging time, long service life, good temperature characteristics, energy saving and environmental protection. Supercapacitors are widely used, but due to the limitation of the conductivity of electrode materials, the reversible electrochemical redox reaction only occurs on the surface of electrode materials, which greatly reduces the utilization of supercapacitor materials, and will also lead to supercapacitor electrode materials The cycle life is reduced and the specific capacity is low. [0003] In recent years, heterojunction composites have been extensively studied in photocatalysis and solar cells. Due to the ...

Claims

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Application Information

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IPC IPC(8): H01G11/86H01G11/24H01G11/30
CPCH01G11/30H01G11/24H01G11/86Y02E60/13
Inventor 熊信柏柳乔
Owner SHENZHEN UNIV
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