Nickel selenide/graphene/carbon nanotube composite material and preparation method thereof

A technology of acidifying carbon nanotubes and carbon nanotubes, which is applied in the direction of hybrid capacitor electrodes, electrical components, battery electrodes, etc., can solve the problems of affecting catalytic performance and electrochemical active sites cannot be fully exposed, and achieve easy operation and effective Quick preparation method, ingenious effect of experimental design

Inactive Publication Date: 2016-10-12
FUDAN UNIV
View PDF2 Cites 19 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Studies have shown that nickel selenide has good hydrogen evolution catalytic activity and excellent stability in acidic medium, but pure nickel

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Nickel selenide/graphene/carbon nanotube composite material and preparation method thereof
  • Nickel selenide/graphene/carbon nanotube composite material and preparation method thereof
  • Nickel selenide/graphene/carbon nanotube composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0035] Example 1 、 This embodiment includes the following steps:

[0036] (1) Ultrasonic dispersion of graphite oxide and acidified carbon nanotubes in water to obtain a concentration of 8 mg mL -1 And 4 mg mL -1 Mix the water dispersion in a volume ratio of 1:1, and stir to make it evenly mixed;

[0037] (2) The obtained graphene oxide / acidified carbon nanotube mixed dispersion is quenched with liquid nitrogen and freeze-dried to obtain graphene oxide / acidified carbon nanotube aerogel;

[0038] (3) The graphene oxide / acidified carbon nanotube aerogel is carbonized at high temperature in high-purity nitrogen, the high-temperature carbonization temperature is 800 ℃, and the high-temperature carbonization time is 2 h, to prepare the graphene / carbon nanotube aerogel;

[0039] (4) Dissolve 1 mmol nickel nitrate hexahydrate and 3 mmol urea in a mixture of 30 mL ethanol and water (volume ratio 2:1), stir for a period of time to make it evenly dispersed;

[0040] (5) After immersing 10 mg of...

Example Embodiment

[0042] Example 2 、 Change the selenization temperature in Example 1 to 450°C, and the rest are the same as in Example 1. The final composite material obtained is denoted as NiSe 2 -GCA-2.

Example Embodiment

[0043] Example 3 、 Change the selenization temperature in Example 1 to 550°C, and the rest are the same as in Example 1. The final composite material obtained is denoted as NiSe 2 -GCA-3.

[0044] figure 1 It is the SEM image of the nickel selenide / graphene / carbon nanotube composite material of Example 2, (A) low magnification, (B) high magnification. figure 2 It is the XRD pattern of the nickel selenide / graphene / carbon nanotube composite material of Example 2 of the present invention. image 3 It is the linear scanning voltammetry curve (LSV) of the nickel selenide / graphene / carbon nanotube composite material and the nickel hydroxide / graphene / carbon nanotube composite material of Example 2 of the present invention. The nickel selenide / graphene / carbon nanotube composite materials prepared in Example 1 and Example 3 have similar morphologies and properties.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention belongs to the technical field of a transition element sulfur group compound-carbon material and particularly relates to a nickel selenide/graphene/carbon nanotube composite material and a preparation method thereof. A preparation process comprises the following steps: preparing graphene oxide/acidified nanotube aerogel through liquid nitrogen quenching and freezing and drying; carrying out high-temperature carbonization and reduction to obtain graphene/nanotube aerogel; carrying out in-situ growth on the aerogel through chemical bath disposition to obtain a nickel hydroxide nano-sheet; and finally, carrying out selenization treatment. The graphene/carbon nanotube aerogel prepared by the invention has stable chemical properties and good conductivity; finally, the prepared composite material has a controllable shape; nickel selenide nano-particles are uniformly loaded on the graphene/nanotube aerogel, and a unique three-dimensional porous structure and a high specific surface area of the graphene/nanotube aerogel are sufficiently utilized; and the composite material can be used as an ideal high-performance electro-catalytic material and an electrode material of new energy source devices including sodium-ion batteries, super-capacitors and the like.

Description

technical field [0001] The invention belongs to the technical field of transition metal chalcogenide-carbon materials, and in particular relates to a nickel selenide / graphene / carbon nanotube composite material and a preparation method thereof. Background technique [0002] The three-dimensional porous structure of graphene / carbon nanotube airgel endows it with excellent physical and chemical properties, such as high electrical conductivity, excellent mechanical properties, high specific surface area, and good chemical stability. Composite materials, catalyst supports, flexible substrate materials for energy conversion and storage devices are widely used. Liquid nitrogen quenching and freeze-drying is a simple and effective technique to prepare graphene aerogels. Through the rapid crystallization of ice crystals at ultra-low temperature and subsequent sublimation, without the sol process, the graphene oxide solution can be directly converted into For solid aerogels, graphene...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H01M4/36H01M4/58H01M4/583H01M4/62H01G11/30H01G11/26H01G11/36
CPCH01G11/26H01G11/30H01G11/36H01M4/362H01M4/581H01M4/583H01M4/625Y02E60/10Y02E60/13
Inventor 刘天西郜伟施贻琴樊玮
Owner FUDAN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap