Transition metal sulfide/graphene composite material as well as preparation method and application thereof

A technology of transition metals and composite materials, applied in the direction of graphene, chemical instruments and methods, nanotechnology for materials and surface science, etc., can solve the problem of low capacity, poor stability, and inconvenient microscopic morphology of ions and electrons Transfer and other issues, to achieve the effect of uniform and controllable shape, high energy density

Active Publication Date: 2020-12-11
GUANGZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, the existing sulfide electrode materials have the problems of low capacity and poor stability due to the inconvenient ion and electron transfer due to their microscopic morphology. Therefore, it is very important to synthesize an electrode material with high capacity and good stability.

Method used

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  • Transition metal sulfide/graphene composite material as well as preparation method and application thereof
  • Transition metal sulfide/graphene composite material as well as preparation method and application thereof
  • Transition metal sulfide/graphene composite material as well as preparation method and application thereof

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Embodiment 1

[0038] A kind of transition metal sulfide / graphene composite material, its preparation method comprises the steps:

[0039] (1) Dissolve manganese acetate tetrahydrate evenly in methanol solvent at a concentration of 0.2mol / L. After fully exhausting the air, transfer it to the polytetrafluoroethylene lining, put the lining into the water-heated outer kettle and fix and seal it. Solvothermal reaction at 180°C for 48h, centrifugation washing with ethanol three times, vacuum drying at 80°C for 12h to obtain hydroxymethyl manganese hydroxide Mn(OH)(OCH 3 ) (denoted as precursor ①).

[0040] (2) Physically mix 200 g of precursor ① with 50 mL of graphene oxide aqueous solution (1 mg / mL) at a mass ratio of 4:1, add 8 mL of CTAB aqueous solution (0.5 mg / mL) dropwise, and wash with water and ethanol for three times , after vacuum drying at 65°C for 12h, hydroxymethyl manganese hydroxide / graphene Mn(OH)(OCH 3 ) / GO (denoted as precursor ②).

[0041] (3) Put 0.4g of sublimed sulfur and...

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Abstract

The invention discloses a transition metal sulfide/graphene composite material as well as a preparation method and application thereof. The preparation method of the transition metal sulfide/graphenecomposite material comprises the following steps that: 1, transition metal salt is dissolved in methyl alcohol, and hydroxymethyl hydroxide of transition metal is obtained through a solvothermal reaction; (2) the hydroxymethyl hydroxide of the transition metal is mixed with a graphene oxide dispersion liquid to obtain a hydroxymethyl hydroxide/graphene composite material; and (3) the hydroxymethylhydroxide/graphene composite material isvulcanized to obtain the transition metal sulfide/graphene composite material. The transition metal sulfide/graphene composite material provided by the invention has high specific capacitance and good cycling stability, and also has high energy density.

Description

technical field [0001] The invention belongs to the technical field of energy storage equipment materials, and in particular relates to a transition metal sulfide / graphene composite material and a preparation method and application thereof. Background technique [0002] Supercapacitors have attracted widespread attention due to their high power density, high charge-discharge rate, and long service life, and are considered to be one of the most promising electrochemical energy storage devices, with the potential to supplement or eventually replace battery energy storage applications. potential for applications in wearable and portable electronics, electric and hybrid vehicles. [0003] Graphene is a two-dimensional carbon monolayer composed of sp 2 Composed of hybrid carbon, it has many superior properties, such as light weight, high electrical and thermal conductivity, controllable surface area, strong mechanical strength and good chemical stability, etc. These excellent p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G45/00C01B32/184H01G11/30H01G11/36B82Y30/00B82Y40/00
CPCC01G45/00C01B32/184H01G11/30H01G11/36B82Y30/00B82Y40/00C01P2006/40C01P2004/03C01P2002/72Y02E60/13
Inventor 刘芝婷陈逊杰张梦辉郑文芝杨伟范浩森
Owner GUANGZHOU UNIVERSITY
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