Transition metal selenide/ordered porous graphene aerogel composite electrode material and preparation method thereof

A graphene aerogel, porous graphene technology, applied in the field of materials, can solve problems such as difficulty in meeting the performance requirements of supercapacitors, and achieve the effects of easy industrial application, good rate performance and cycle stability, and easy operation.

Active Publication Date: 2019-12-17
BINZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is difficult for a single electrode material to meet all the performance requirements of supercapacitors, so the development of composite electrode materials is an effective way to improve the performance of supercapacitors, especially their energy density

Method used

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  • Transition metal selenide/ordered porous graphene aerogel composite electrode material and preparation method thereof
  • Transition metal selenide/ordered porous graphene aerogel composite electrode material and preparation method thereof
  • Transition metal selenide/ordered porous graphene aerogel composite electrode material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0031] A transition metal selenide / ordered porous graphene airgel composite electrode material and a preparation method thereof, comprising the following steps:

[0032] In the first step, 80 mg of nickel chloride hexahydrate was dissolved in 30 mL of graphene oxide dispersion (3 mg / mL), ultrasonically obtained for 1 hour to obtain a uniformly dispersed suspension, and then a piece of melamine foam (30 mg / mL) was cut and washed clean ×30×5mm) for 30 minutes. Then transfer the reaction mixture and the above-mentioned melamine foam into a reaction kettle, and then put the reaction kettle into an oven, and react at 90° C. for 5 hours to synthesize a transition metal-graphene oxide-template hydrogel. Then the obtained hydrogel was placed in a hydriodic acid solution with a concentration of 37% to remove melamine foam. It was washed and then freeze-dried for 60 hours to obtain transition metal precursor / ordered porous graphene airgel.

[0033] The second step: place the selenium ...

Embodiment 2

[0039] In the first step, 80 mg of nickel chloride hexahydrate was dissolved in 30 mL of graphene oxide dispersion (3 mg / mL), and ultrasonicated for 1 hour to obtain a uniformly dispersed suspension. A piece of cut and washed melamine foam (30×30×5 mm) was then inserted into it for an immersion time of 50 minutes. Then the reaction mixture was transferred to a reaction kettle, and then the reaction kettle was put into an oven, and reacted at 85° C. for 8 hours to synthesize a transition metal-graphene oxide-template hydrogel. Then the obtained hydrogel was placed in a hydriodic acid solution with a concentration of 37% to remove melamine foam. It was washed and then freeze-dried for 60 hours to obtain transition metal precursor / ordered porous graphene airgel.

[0040] The second step: place the selenium powder and the transition metal precursor / ordered porous graphene airgel obtained above on the two ends of the magnetic boat, and in the tube furnace, Ar / H 2 (9:1) atmosphere...

Embodiment 3

[0042]In the first step, 60 mg of nickel chloride hexahydrate was dissolved in 25 mL of graphene oxide dispersion (6 mg / mL), and ultrasonicated for 1 hour to obtain a uniformly dispersed suspension. A piece of washed melamine foam (30 x 30 x 5 mm) was then inserted into it for an immersion time of 50 minutes. Then the reaction mixture was transferred to a reaction kettle, and then the reaction kettle was put into an oven, and reacted at 85° C. for 8 hours to synthesize a transition metal-graphene oxide-template hydrogel. Then the obtained hydrogel was placed in a hydriodic acid solution with a concentration of 37% to remove melamine foam. It was washed and then freeze-dried for 60 hours to obtain transition metal precursor / ordered porous graphene airgel.

[0043] The second step: place the selenium powder and the transition metal precursor / ordered porous graphene airgel obtained above on the two ends of the magnetic boat, and in the tube furnace, Ar / H 2 (9:1) atmosphere, the...

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Abstract

The invention belongs to the technical field of materials and discloses a transition metal selenide/ordered porous graphene aerogel composite electrode material and a preparation method thereof. The transition metal selenide/ordered porous graphene aerogel composite electrode material is prepared through a two-step method. The preparation method is rapid and simple in technological process and lowin cost; the obtained energy storage electrode material has excellent electrochemical performance and is convenient for industrial application. The transition metal selenide/ordered porous graphene aerogel composite electrode material prepared has a porous network structure, has the mass capacity of 1701F/g, has excellent rate capability and cycling stability, and can be applied to electrodes ofsupercapacitors and batteries.

Description

technical field [0001] The invention belongs to the field of material technology and discloses a transition metal selenide / ordered porous graphene airgel composite material and a preparation method thereof. Background technique [0002] Energy and environmental issues are currently important issues of common concern to all countries in the world, and the development of new green energy and energy conversion and storage have attracted much attention. Although lithium-ion batteries have the advantages of high energy density, their low power density, poor cycle stability, and poor safety limit their applications. As an efficient chemical power source, supercapacitor has the advantages of high power density, fast charge and discharge speed, long cycle life, and environmental friendliness, so it has attracted extensive attention and has broad application prospects in the fields of automotive products and portable consumer electronics. [0003] The main problem with supercapacito...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/30H01G11/32H01G11/24H01G11/26H01G11/86H01M4/36H01M4/58H01M4/583H01M4/62
CPCH01G11/24H01G11/26H01G11/30H01G11/32H01G11/86H01M4/362H01M4/58H01M4/583H01M4/625Y02E60/10
Inventor 解胜利苟建霞赵英渊
Owner BINZHOU UNIV
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