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

Preparation of selenium-coated tin dioxide/graphene nano composite material and application thereof

A nano-composite material, tin dioxide technology, applied in the direction of non-aqueous electrolyte battery electrodes, electrical components, battery electrodes, etc., can solve the problems of poor rate and cycle performance, and achieve simple preparation methods, cheap raw materials, and excellent sodium storage performance Effect

Active Publication Date: 2018-02-16
NORTHEAST NORMAL UNIVERSITY
View PDF7 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve SnO 2 As a sodium ion anode material, the rate and cycle performance are poor. A new selenium-coated tin dioxide / graphene nanocomposite with high specific capacity and good cycle stability is proposed.

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
  • Preparation of selenium-coated tin dioxide/graphene nano composite material and application thereof
  • Preparation of selenium-coated tin dioxide/graphene nano composite material and application thereof
  • Preparation of selenium-coated tin dioxide/graphene nano composite material and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The preparation of the tin dioxide / graphene nanocomposite material of embodiment 1 selenium coating

[0022] 2.48g of L-tartaric acid was added to 50ml of deionized water, then 295uL of anhydrous tin tetrachloride was added to the solution, and 150mg of graphene oxide aqueous solution (3.5mg mL -1 ), diluted to 300mL; under continuous stirring, add 50mL of 0.1mg mL dropwise to the above suspension -1 Sodium borohydride solution, then ultrasonic 3-6h, centrifuged, washed with deionized water and absolute ethanol, vacuum-dried at 80 ° C; to obtain the intermediate product of Sn; the mass ratio of selenium powder and Sn intermediate product was 2.5:1 Mix evenly, heat up to 400° C., and calcinate for 4 hours; obtain a selenium-coated tin dioxide / graphene nanocomposite material.

Embodiment 2

[0023] The preparation of the tin dioxide / graphene nanocomposite material of embodiment 2 selenium coating

[0024] 2.48g of L-tartaric acid was added to 50ml of deionized water, then 295uL of anhydrous tin tetrachloride was added to the solution, and 150mg of graphene oxide aqueous solution (3.5mg mL -1 ), diluted to 300mL; under continuous stirring, 50mL of 0.3mg mL was added dropwise to the above suspension -1 Sodium borohydride solution, then ultrasonic 3-6h, centrifuged, washed with deionized water and absolute ethanol, vacuum-dried at 80 ° C; to obtain the intermediate product of Sn; the mass ratio of selenium powder and Sn intermediate product was 2.5:1 Mix evenly, heat up to 400° C., and calcinate for 4 hours; obtain a selenium-coated tin dioxide / graphene nanocomposite material.

Embodiment 3

[0025] The preparation of the tin dioxide / graphene nanocomposite material of embodiment 3 selenium coating

[0026] 2.48g of L-tartaric acid was added to 50ml of deionized water, then 295uL of anhydrous tin tetrachloride was added to the solution, and 150mg of graphene oxide aqueous solution (2mg mL -1 ), diluted to 300mL; under constant stirring, add 50mL of 0.2mg mL dropwise to the above suspension -1 Sodium borohydride solution, then ultrasonic 3-6h, centrifuged, washed with deionized water and absolute ethanol, vacuum-dried at 80 ° C; to obtain the intermediate product of Sn; the mass ratio of selenium powder and Sn intermediate product was 2.5:1 Mix evenly, heat up to 400° C., and calcinate for 4 hours; obtain a selenium-coated tin dioxide / graphene nanocomposite material.

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 discloses a selenium-coated tin dioxide / graphene nano composite material and an application thereof in a cathode material of a sodium-ion battery. The selenium-coated tin dioxide / graphene nano composite material is characterized in that 1) two types of SnO2 of different crystal phases (SnO2 of a tetragonal system and SnO2 of an orthorhombic system) tightly grow together to form nanoscale particles; 2) the formed nanoscale particles are uniformly combined on the surface of three-dimensional graphene; and 3) unordered selenium uniformly coats the surface of the tin dioxide / graphenenano structure. The selenium-coated tin dioxide / graphene nano composite material provided by the invention is simple in preparation method, cheap in raw material and uniform in shape, can be preparedon a large scale, and shows an excellent sodium storage property as the cathode material of the sodium-ion battery, benefited by the selenium coating. The two tin dioxide heterostructures in the composite material and the three-dimensional conducting network of graphene have a synergistic effect, so that the material is quite expected to be applied to the cathode material of the sodium-ion battery.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials and sodium ion secondary batteries, and in particular relates to a selenium-coated tin dioxide / graphene nanocomposite material and applications thereof. Background technique [0002] Energy and the environment have always been the focus of attention around the world. In recent years, with the increasing consumption of non-renewable energy and the gradual aggravation of environmental pollution, people's demand for clean energy is also increasing. Due to the limited reserves of lithium resources in the world, it is difficult to meet the urgent demand for future energy storage by relying on lithium-ion batteries alone. Therefore, it is urgent to develop a next-generation high-performance energy storage power supply that can replace lithium-ion batteries. Sodium is an active metal element in the same main group as lithium and has similar physical and chemical properties. Because of this, sodiu...

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): H01M4/36H01M4/13
CPCH01M4/13H01M4/362Y02E60/10
Inventor 吴兴隆王莺莺侯宝华吕红艳
Owner NORTHEAST NORMAL UNIVERSITY
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