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

Pine dendritic samarium oxide graphene sulfur gel structure material and its preparation method and application

A gel structure and graphene technology, applied in graphene, chemical instruments and methods, structural parts, etc., can solve the problems of low sulfur loading, low cycle life, and poor cycle performance, so as to improve electrochemical performance, Improve the sulfur loading capacity and promote the effect of reaction conversion

Active Publication Date: 2021-05-11
QILU UNIV OF TECH
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present disclosure is to provide a pine dendritic samarium oxide graphene sulfur gel structure material and its preparation method and application, so as to solve the technical problems of the existing lithium-sulfur battery cathode materials such as low conductivity, low stability and poor cycle performance; at the same time Solve the technical problems of low sulfur load and low cycle life of existing lithium-sulfur batteries

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
  • Pine dendritic samarium oxide graphene sulfur gel structure material and its preparation method and application
  • Pine dendritic samarium oxide graphene sulfur gel structure material and its preparation method and application
  • Pine dendritic samarium oxide graphene sulfur gel structure material and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] (1) Preparation of reduced graphene oxide-samarium precursor: Weigh 80 mg of graphene oxide and place it in a 100 mL beaker, then add 40 mL of deionized water, ultrasonicate for 2 hours, then take 2.5 mL of 1.6 mmol L -1 The samarium nitrate aqueous solution was placed in a 100mL beaker, the graphene oxide colloidal solution was slowly added to the samarium nitrate solution, stirred for 2 hours and mixed evenly to obtain a mixture, the mass fraction of 25% ammonia water was added dropwise until the pH reached 10, and then stirred at every 5 Add 1.3mL85mg mL dropwise at a rate of 100 microliters per minute -1 Hydrazine hydrate solution, transfer the solution to a reaction kettle and react at 180°C for 6 hours. After the reaction product is naturally cooled, centrifuged, washed, frozen, and freeze-dried, the reduced graphene oxide-samarium precursor gel is obtained.

[0058] (2) Preparation of pine dendritic samarium oxide / graphene gel: place the reduced graphene oxide-sa...

Embodiment 2

[0066] (1) Preparation of reduced graphene oxide-samarium precursor: Weigh 80 mg of graphene oxide and place it in a 100 mL beaker, then add 40 mL of deionized water, ultrasonicate for 2 hours, then take 2.5 mL of 1.2 mmol L -1 The samarium nitrate aqueous solution was placed in a 100mL beaker, the graphene oxide colloidal solution was slowly added to the samarium nitrate solution, stirred for 2 hours and mixed evenly to obtain a mixture, the mass fraction of 25% ammonia water was added dropwise until the pH reached 10, and then stirred at every 5 Add 1.3mL85mg mL dropwise at a rate of 100 microliters per minute -1 Hydrazine hydrate solution, transfer the solution to a reaction kettle and react at 180°C for 6 hours. After the reaction product is naturally cooled, centrifuged, washed, frozen, and freeze-dried, the reduced graphene oxide-samarium precursor gel is obtained.

[0067] Steps (2), (3) are the same as in Example 1.

Embodiment 3

[0069] (1) Preparation of reduced graphene oxide-samarium precursor: Weigh 80 mg of graphene oxide and place it in a 100 mL beaker, then add 40 mL of deionized water, ultrasonicate for 2 hours, and then take 2.5 mL of 0.8 mmol L -1 The samarium nitrate aqueous solution was placed in a 100mL beaker, the graphene oxide colloidal solution was slowly added to the samarium nitrate solution, stirred for 2 hours and mixed evenly to obtain a mixture, the mass fraction of 25% ammonia water was added dropwise until the pH reached 10, and then stirred at every 5 Add 1.3mL85mg mL dropwise at a rate of 100 microliters per minute -1 Hydrazine hydrate solution, transfer the solution to a reaction kettle and react at 180°C for 6 hours. After the reaction product is naturally cooled, centrifuged, washed, frozen, and freeze-dried, the reduced graphene oxide-samarium precursor gel is obtained.

[0070] Steps (2), (3) are the same as in Example 1.

[0071] Through testing, the CV curve and charg...

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 disclosure provides a pine dendritic samarium oxide graphene sulfur gel structure material and its preparation method and application. The material is a cross-linked gel structure formed by attaching pine dendritic samarium oxide to the surface of reduced graphene oxide, and the gel structure supports simple sulfur; its preparation The method is as follows: the reduced graphene oxide-samarium precursor is prepared by hydrothermal reduction reaction of graphene oxide and samarium salt, and the reduced graphene oxide-samarium precursor is pyrolyzed under an inert atmosphere to obtain the reduced graphene oxide-pine dendritic oxide Samarium gel, obtained by melt-diffusion of elemental sulfur onto reduced graphene oxide-pine dendritic samarium oxide gel. The pine dendritic samarium oxide graphene-sulfur gel structure material provided by the present disclosure can greatly improve the electrochemical performance of lithium-sulfur batteries.

Description

technical field [0001] The disclosure belongs to the technical field of lithium-sulfur batteries, and relates to nanomaterial technology, in particular to a pine dendritic samarium oxide graphene sulfur gel structure material, a preparation method and an application thereof. Background technique [0002] The statements herein merely provide background information related to the present disclosure and may not necessarily constitute prior art. [0003] In recent years, with the rapid development of science and technology, especially the continuous upgrading of consumer electronics and the rapid rise of new energy vehicles, people have higher and higher requirements for battery performance. Due to its limited energy density (~420W·h / kg), traditional lithium-ion batteries are increasingly difficult to meet the energy storage needs of the growing new energy vehicles, aerospace industry and various high-tech electronic products. Therefore, it is imminent to develop next-generatio...

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): C01B32/194C01F17/206H01M4/36H01M4/38H01M4/485H01M4/62H01M10/052
CPCC01B32/194H01M4/362H01M4/485H01M4/38H01M4/625H01M10/052H01M2004/028C01P2002/72C01P2002/88C01P2004/03C01P2006/40C01P2004/80C01B2204/22Y02E60/10H01M4/36H01M4/62H01M4/1397H01M4/136H01M4/366H01M4/5815
Inventor 顾少楠刘冰洁王轶男周国伟宋晓艺
Owner QILU UNIV OF TECH
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