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Nickel-cobalt bimetallic oxide composite material, nickel-cobalt bimetallic sulfide composite material and supercapacitor

A double metal oxide and composite material technology, applied in the field of supercapacitor electrode materials, can solve the problems of low energy density and limited application of supercapacitors, and achieve the effects of excellent electrochemical performance, high power density and good conductivity

Active Publication Date: 2020-08-14
WENZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the energy density of supercapacitors is very low compared with batteries, which largely limits their application in advanced electronics
Nowadays, it is still a great challenge to develop electrode materials with superior structures to increase energy density without sacrificing power density and cycle life.

Method used

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  • Nickel-cobalt bimetallic oxide composite material, nickel-cobalt bimetallic sulfide composite material and supercapacitor
  • Nickel-cobalt bimetallic oxide composite material, nickel-cobalt bimetallic sulfide composite material and supercapacitor
  • Nickel-cobalt bimetallic oxide composite material, nickel-cobalt bimetallic sulfide composite material and supercapacitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1-1) Weigh 0.13g (0.003mol) NaOH, pour it into a 50mL beaker, add a mixed solution of 9mL absolute ethanol and 1mL deionized water, stir on a constant temperature magnetic stirrer until the solid is completely dissolved, then , add 0.4626g (0.003mol) thiosalicylic acid, at room temperature, stir for 30min, until the thiosalicylic acid is completely dissolved, to obtain solution A;

[0033] (1-2) Weigh 0.1785g (0.00075mol) CoCl 2 ·6H 2 O and 0.1782g (0.00075mol) NiCl 2 ·6H 2 O was added to a 25mL beaker and dissolved in 5mL of deionized water to obtain solution B;

[0034] (1-3) Add solution B dropwise to solution A, and continue to stir for 30 minutes;

[0035] (1-4) Pour the mixed solution into a 50mL reaction kettle, seal it, and react it in a 120°C electric blast drying oven for 96h. After washing for the first time, dry it in an electric blast drying oven at 80°C to obtain a black solid powder, that is, a nickel-cobalt double metal complex;

[0036] (1-5) Put...

Embodiment 2

[0040] (2-1) Weigh 0.15 g of the nickel-cobalt double metal oxide composite material prepared in Example 1 and 0.03 g of thioacetamide according to a mass ratio of 5:1, and add thioacetamide to a 25 mL beaker, Dissolve in 15mL of deionized water, stir on a constant temperature magnetic stirrer for 15min, after the dissolution is complete, add nickel-cobalt double metal oxide composite material, and continue stirring for 30min;

[0041] (2-2) Pour all the mixed solution into a 25mL reaction kettle, seal it, and react it in an electric blast drying oven at 160°C for 10h. After the reaction is completed, cool it to room temperature to obtain the product;

[0042] (2-3) The product is washed several times with deionized water, and dried in an electric blast drying oven at 60°C to obtain a nickel-cobalt bimetallic sulfide composite material, which is represented by 5:1 in the accompanying drawings. Using the same vulcanization method, according to the mass ratio of nickel-cobalt doub...

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Abstract

The invention belongs to the technical field of supercapacitor electrode materials, and particularly relates to a nickel-cobalt bimetallic oxide composite material, a nickel-cobalt bimetallic sulfidecomposite material and a supercapacitor. According to the invention, thiosalicylic acid is used as a ligand, Co<2+> and Ni<2+> are added, a nickel-cobalt bimetallic organic complex is hydrothermally synthesized, and the nickel-cobalt bimetallic oxide composite material is prepared by calcining at 400 DEG C. Furthermore, the nickel-cobalt bimetallic oxide composite material with excellent electrochemical performance is used as a precursor; the nickel-cobalt bimetallic sulfide composite material is obtained through one-step hydrothermal vulcanization, the electrochemical performance of the nickel-cobalt bimetallic sulfide composite material is obviously superior to that of a nickel-cobalt bimetallic oxide composite material, and high energy density, high power density, good conductivity andlong cycle life can be kept while the specific capacitance is improved.

Description

technical field [0001] The invention belongs to the technical field of supercapacitor electrode materials, and in particular relates to a nickel-cobalt double-metal oxide composite material, a nickel-cobalt double-metal sulfide composite material and a supercapacitor. Background technique [0002] In recent years, the advancement of science and technology has greatly promoted the development of various electronic products in daily life. This requires finding the fastest and most efficient charging devices for our electronic tools. Batteries have been widely used for centuries, but they have some disadvantages, such as low power density and short service life. Supercapacitors, which have the advantages of high power density, fast charging and discharging, and long cycle life, can just make up for the disadvantages of batteries, and they are becoming a new generation of energy storage devices. However, the energy density of supercapacitors is very low compared with batteries...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/30H01G11/46H01G11/86
CPCH01G11/30H01G11/46H01G11/86Y02E60/13
Inventor 李新华祝精燕
Owner WENZHOU UNIVERSITY
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