A sb for lithium-sulfur battery separator 2 the se 3 Preparation method of composite material

A composite material, lithium-sulfur battery technology, applied in battery pack parts, circuits, electrical components, etc., can solve problems such as polysulfide adsorption, and achieve the effects of high production yield, improved utilization, and simple process

Active Publication Date: 2020-09-15
INT ACAD OF OPTOELECTRONICS AT ZHAOQING SOUTH CHINA NORMAL UNIV
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the open architecture of most of these materials, the polysulfides cannot be effectively adsorbed in the positive electrode after long-term cycling.

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 sb for lithium-sulfur battery separator <sub>2</sub> the se <sub>3</sub> Preparation method of composite material
  • A sb for lithium-sulfur battery separator <sub>2</sub> the se <sub>3</sub> Preparation method of composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The present invention will be further described below in conjunction with specific embodiment:

[0029] Sb used in the present invention 2 Se 3 , pvp and GO suspensions were all purchased from the market.

[0030] The first step is to prepare Sb 2 Se 3 -pvp-rGO:

[0031] Weigh Sb 2 Se 3 Powder 0.20g, weigh 0.05g pvp, pour it into a beaker, add 49.75mL deionized water, and configure it as a mass fraction of 0.5% Sb 2 Se 3 -pvp suspension, using a magnetic stirrer to stir for 1h, then Sb 2 Se 3 - The pvp suspension was sonicated on an ultrasonic cell pulverizer for 30 minutes to disperse it evenly. Then mixed with graphene oxide aqueous solution, according to Sb 2 Se 3 -The mass ratio of pvp to graphene oxide is 1:1, measure 125mL graphene oxide aqueous phase dispersion (concentration is 2mg / mL), prepare Sb 2 Se 3 - The mixed dispersion of pvp-GO was magnetically stirred for 1 hour, then sonicated for 20 minutes using an ultrasonic cell disruptor, and then l...

Embodiment 2

[0039] Others are the same as embodiment 1, and the difference is the first step Sb 2 Se 3 - The mass ratio of pvp to graphene oxide is 1:1.5, and the dosage of hydrazine hydrate is 37.5 μL.

Embodiment 3

[0041] Others are the same as embodiment 1, and the difference is the first step Sb 2 Se 3 - The mass ratio of pvp to graphene oxide is 1:2, and the dosage of hydrazine hydrate is 50 μL.

[0042] figure 1 For the prepared Sb of Example 1 2 Se 3 - XRD pattern of pvp-rGO material. It can be seen from the figure that there is an obvious graphene peak at 23°, proving that rGO and Sb 2 Se 3 -pvp materials compound very well.

[0043] figure 2 For the prepared Sb of Example 1 2 Se 3 - The first charge-discharge curve of pvp-rGO material as a separator at 0.1C. The test equipment uses Xinwei BTS-2000, and the test is carried out at a constant room temperature (25°C). The constant current discharge voltage is set to 3.0V, and the charging voltage is set to 1.5V, so that the prepared lithium-sulfur battery can work in the voltage range of 1.5-3.0V. It can be seen from the figure that the charge and discharge specific capacities of the 60th cycle can still reach 1168 and 10...

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
diameteraaaaaaaaaa
Login to view more

Abstract

The invention is a kind of Sb used for lithium-sulfur battery diaphragm 2 Se 3 Methods of preparation of composite materials. The method is to introduce rod-shaped Sb 2 Se 3 As the supporting skeleton of the graphene sheet, the structure of the coating substance was modified by adding Sb 2 Se 3 ‑pvp is mixed with graphene oxide at a certain ratio, and graphene oxide is reduced by hydrazine hydrate to obtain Sb 2 Se 3 ‑Pvp and reduced graphene oxide dispersion, spray-dry the dispersion to obtain solid powder, and bond with Celgard2400 diaphragm through binder to prepare Sb 2 Se 3 ‑pvp‑rGO composite membrane. The invention improves the electrochemical performance of the lithium-sulfur battery with a simple and cheap method.

Description

technical field [0001] The invention relates to the technical field of lithium-sulfur battery separator materials, in particular to a Sb used for lithium-sulfur battery separators 2 Se 3 Preparation of composite materials to improve the electrochemical performance of lithium-sulfur batteries. Background technique [0002] The rapid development of the global economy has led to the continuous consumption of non-renewable energy, resulting in an energy crisis. In order to solve the energy crisis, the development and utilization of renewable energy generation represented by solar energy and wind energy has become a top priority. However, these natural energy sources including solar energy, wind energy, tidal energy, etc. are intermittent, and the amount of electric energy generated by them depends heavily on natural factors such as weather, season, time, and location. If these unstable electric energy is directly connected to the grid, it will seriously interfere with the nor...

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): H01M2/14H01M2/16H01M50/403H01M50/414H01M50/431
CPCH01M50/446H01M50/403Y02E60/10
Inventor 张永光
Owner INT ACAD OF OPTOELECTRONICS AT ZHAOQING SOUTH CHINA NORMAL 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