Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Composite positive electrode material based on 3D graphene and preparation method thereof

A composite positive electrode material and composite material technology, which is applied in the field of positive electrode materials composited with nano-metallic nickel and three-dimensional graphene and its preparation, can solve the problems of high cost and complicated process, and achieve low cost, simple process, and reduced capacity fading. Effect

Active Publication Date: 2014-12-24
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
View PDF6 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to overcome the disadvantages of complicated process and high cost in the existing synthesis method of nickel and graphene composites, and provide a three-dimensional graphene / nano metal nickel composite and a preparation method thereof, so as to utilize the three-dimensional graphene The pore structure loads a large amount of nano-metal nickel, which is conducive to the effective transmission of electrons between nickel, graphene and current collectors, while improving the utilization of nickel in the positive electrode material, and improving the specific capacity and cycle stability of the battery; while making it The preparation method has the advantages of simple process, low cost, environmental friendliness and controllable material morphology

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
  • Composite positive electrode material based on 3D graphene and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0028] The present invention also relates to a method for preparing the above-mentioned three-dimensional graphene-based composite positive electrode material. figure 1Show the composite process schematic diagram of three-dimensional graphene of the present invention and nano metal nickel, refer to figure 1 , the preparation method of the present invention comprises: graphene is oxidized to graphene oxide; Make graphene oxide and have at least two bridging organic matter that can react with the oxygen-containing group on described graphene oxide and / or esterification to form a three-dimensional structure by bridging each other; adsorbing metal nickel salt in the three-dimensional structure; and reducing it to prepare a three-dimensional graphene-based composite positive electrode material.

[0029] More specifically, the present invention may include the following steps:

[0030] (1) adding natural graphite into water, after ultrasonic dispersion, after continuing to stir fo...

Embodiment 1

[0057] Put 6g of natural graphite powder into 1000mL water, after ultrasonication for 2 hours, and then magnetically stir for 2 hours, place the resulting mixed solution in a microwave reaction vessel and heat at 100°C for 10 minutes, then add excess ethylene glycol and an appropriate amount of concentrated sulfuric acid to adjust the pH to 5-7 In between, heat in a 70°C oil bath while stirring until the liquid becomes viscous, then cool to room temperature. Add 50mL of 0.05M nickel oxalate solution in ethylene glycol dropwise, continue to stir for 24h, and then freeze-dry. Three-dimensional graphene and nano-nickel metal composites were obtained after treatment at 350 °C for 2 h in a hydrogen atmosphere.

Embodiment 2

[0059] Put 6g of natural graphite powder into 1000mL water, after ultrasonication for 2 hours, and then magnetically stir for 2 hours, place the resulting mixed solution in a microwave reaction vessel and heat at 100°C for 10 minutes, then add excess ethylene glycol and an appropriate amount of concentrated sulfuric acid to adjust the pH to 5-7 In between, heat in a 70°C oil bath while stirring until the liquid becomes viscous, then cool to room temperature. Add 100mL of 0.05M nickel oxalate solution in ethylene glycol dropwise, continue to stir for 24h, and then freeze-dry. Three-dimensional graphene and nano-nickel metal composites were obtained after treatment at 350 °C for 2 h in a hydrogen atmosphere.

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 relates to a composite positive electrode material based on 3D graphene and a preparation method thereof. The composite positive electrode material contains three-dimensional graphene and nano metal nickel, wherein the nano nickel particles uniformly disperse in the channels of three-dimensional graphene, the three-dimensional comprises a plurality of graphene molecules interconnected through a plurality of small organic molecules, and the nano nickel particles are introduced into the channels of the three-dimensional graphene by an in-situ reduction reaction. The composite positive electrode material provided by the invention has good electronic conductivity, is conducive to the effective electron transfer between the electrode and the collector, realizes high utilization of active materials, and is beneficial to improve the specific capacity and cycle stability of the battery. In addition, the preparation process is simple, environmental-friendly and low-cost, and the material has controllable morphology.

Description

technical field [0001] The invention relates to a composite positive electrode material based on three-dimensional graphene and a preparation method thereof, in particular to a composite positive electrode material composed of nano-metal nickel and three-dimensional graphene and a preparation method thereof, belonging to the field of electrochemical energy storage. Background technique [0002] Since the 1970s, with β”-Al 2 o 3 Beta batteries with ceramics as solid electrolyte and metal sodium as negative electrode, such as sodium-sulfur batteries and sodium-chloride batteries (ZEBRA batteries), have high energy density, high cycle efficiency, low cost, and environmental friendliness. Many fields, such as automobiles and energy storage, have aroused widespread interest from all over the world. Different from the positive electrode of the sodium-sulfur battery, the positive electrode of the ZEBRA battery is made of NaAlCl 4 Solid Ni and NiCl in Molten Salt Electrolyte 2 c...

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
Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/583H01M4/36
CPCH01M4/364H01M4/38H01M4/625Y02E60/10
Inventor 温兆银吴梅芬吴相伟张敬超胡英瑛靳俊
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com