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

A hollow graphene sphere loaded nano-tin disulfide composite material and its preparation method

A graphene ball, tin disulfide technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of volume expansion, electrode powderization, storage capacity and cycle life decline, etc., Achieve the effect of inhibiting agglomeration, low cost of raw materials, and improving transportation capacity

Active Publication Date: 2018-01-02
SHANGHAI UNIV
View PDF3 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to its low lithium intercalation voltage and high theoretical capacity (645 mAh / g), tin disulfide has been widely concerned by researchers in recent years. Like tin-based materials, the problem with this lithium-ion battery anode material is that during the intercalation and delithiation process, the volume expands, resulting in electrode powdering, resulting in a rapid decline in storage capacity and cycle life.

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
  • A hollow graphene sphere loaded nano-tin disulfide composite material and its preparation method
  • A hollow graphene sphere loaded nano-tin disulfide composite material and its preparation method
  • A hollow graphene sphere loaded nano-tin disulfide composite material and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A preparation method of hollow graphene sphere loaded nano-tin disulfide composite material, the steps of the method are as follows:

[0023] Take 0.3 g of initiator potassium persulfate into a three-neck round-bottomed flask, add 50 mL of deionized water, add a rotor to stir the potassium persulfate solution, pass through nitrogen protection, heat to 60 ° C, and then add 2 mL of styrene monomer, Condensate and reflux for 24 hours, add 500 μL of methacryloyloxyethyltrimethylammonium chloride after the condensing and reflux reaction for 7 hours, after the reaction, wash with deionized water, and vacuum dry for 12 hours to obtain Solid, that is, cationic polystyrene balls;

[0024] Disperse the obtained cationic polystyrene spheres in water, sonicate for 1 h, take a certain amount of graphene oxide solution and sonicate for 1 h, after ultrasonication, mix the dispersed graphene oxide aqueous solution with cationic polystyrene spheres in a mass ratio of 1:4, Ultrasound fo...

Embodiment 2

[0029] A kind of preparation method of hollow graphene sphere loaded nano tin disulfide composite material, the steps of the method are as follows

[0030] Take 0.25 g of the initiator potassium persulfate and add it to a three-necked round-bottomed flask, then add 50 mL of deionized water, add a rotor to stir the potassium persulfate solution, pass in nitrogen protection, heat to 75°C, and then add 5 mL of styrene monomer, Condensate and reflux for 24 hours, add 500 μL of methacryloyloxyethyltrimethylammonium chloride after the condensed and reflux reaction for 5 hours, after the reaction, wash with deionized water and dry in vacuum for 6 hours, and the solid obtained after drying , to obtain cationic polystyrene balls;

[0031] Disperse the obtained cationic polystyrene spheres in water, sonicate for 1 h, take a certain amount of graphene oxide solution and sonicate for 1 h, after sonication, mix the dispersed graphene oxide aqueous solution with cationic polystyrene spheres...

Embodiment 3

[0034] A kind of preparation method of hollow graphene sphere loaded nano tin disulfide composite material, the steps of the method are as follows

[0035] Take 0.5 g of the initiator potassium persulfate and add it to a round-bottomed three-neck flask, then add 50 mL of deionized water, add the rotor to stir the potassium persulfate solution, pass through nitrogen protection, heat to 85 ° C, and then add 8 mL of styrene monomer, Condensate and reflux for 24 hours, add 400 μL of methacryloyloxyethyltrimethylammonium chloride after the condensing and reflux reaction for 10 hours, after the reaction, wash with deionized water and dry in vacuum for 12 hours, and the solid obtained after drying , to obtain cationic polystyrene balls;

[0036] Disperse the obtained cationic polystyrene spheres in water, sonicate for 1 h, take a certain amount of graphene oxide solution and sonicate for 1 h, after ultrasonication, mix the dispersed graphene oxide aqueous solution with cationic polys...

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

PropertyMeasurementUnit
sizeaaaaaaaaaa
sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a composite material with hollow graphene spheres loaded with nanometer tin disulfide. The composite material is characterized in that the hollow graphene spheres with sub-micron sizes are used as carriers, tin disulfide nanometer particles are loaded on the inner walls and the outer walls of the hollow graphene spheres, and the sizes of the tin disulfide nanometer particles grown on the surfaces of the hollow graphene spheres range from 10 nm to 40 nm. A method for preparing the composite material includes steps of a, synthesizing cationic polystyrene spheres; b, synthesizing the hollow graphene spheres; c, loading the tin disulfide to obtain the composite material with the hollow graphene spheres loaded with the nanometer tin disulfide. The composite material and the method have the advantages that the composite material is a carbon material with a two-dimensional structure, the tin disulfide with an expanded volume can be accommodated in charging and discharging procedures, and the electric conductivity and the structural stability of electrode materials can be improved; the electric conductivity and the ion transport performance of the materials can be improved by porous graphene structures, and the composite material is favorable for embedding lithium ions in the materials and releasing the lithium ions from the materials.

Description

technical field [0001] The invention relates to a hollow graphene sphere-loaded nano-tin disulfide composite material used as a negative electrode material of a lithium battery and a preparation method thereof, belonging to the technical field of electrochemistry and material synthesis. Background technique [0002] Lithium-ion batteries have become the most widely used secondary batteries in the world today because of their high energy density, long cycle life, and no memory effect. With the further development of lithium-ion battery research, the development of battery materials with high capacity, high rate performance and long cycle life has become the focus of this field. At present, the negative electrode materials actually used in lithium-ion batteries are generally carbon materials, such as graphite, soft carbon, hard carbon, etc. Carbon anode materials (theoretical capacity 372 mAh / g) can no longer meet the needs of high capacity in the future, and various metal co...

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 Patents(China)
IPC IPC(8): H01M4/36H01M4/58H01M4/587H01M4/62H01M10/0525B82Y30/00
CPCB82Y30/00H01M4/362H01M4/5815H01M4/587H01M4/625H01M10/0525Y02E60/10
Inventor 蒋永赵兵王志轩高阳陈芳杨雅晴高强焦正
Owner SHANGHAI UNIV
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