Method for preparing lithium-sulfur battery electrode directly from hydrogen-sulfide-containing recyclate

A technology of lithium-sulfur batteries and recyclables, applied in the field of carbon-sulfur composite material preparation, can solve the problems of cumbersome operation process, unfavorable industrial production, large energy and solvent consumption, etc., and achieve the effect of shortening the process flow

Inactive Publication Date: 2018-03-27
TIANJIN UNIV
View PDF4 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, conventional carbon-sulfur composite processes such as high-temperature solid-phase method, solvent method, solvothermal impregnation method, and chemical deposition method consume a lot of energy and solvents, and the operation process is cumbersome, and does not utilize industrial production.

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
  • Method for preparing lithium-sulfur battery electrode directly from hydrogen-sulfide-containing recyclate
  • Method for preparing lithium-sulfur battery electrode directly from hydrogen-sulfide-containing recyclate
  • Method for preparing lithium-sulfur battery electrode directly from hydrogen-sulfide-containing recyclate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Inject the sulfide recovery solution into the anode chamber of the electrolytic cell, inject 0.1mol / L NaOH aqueous solution into the cathode chamber, and use conductive graphite and foamed nickel as materials for the cathode and anode respectively. The two chambers are separated by a perfluorosulfonic acid cation exchange membrane, and the sulfide recovery solution is an aqueous solution, Na 2 S is 0.35mol / L, Na 2 CO 3 is 0.5mol / L, and the pH value is 14.

[0027] (2) Pass direct current to the electrolytic cell, and the current density is controlled at 10mA / cm 2 , The electrolysis time is 16h.

[0028] (3) After the electrolysis is completed, take out the anode, wash it with distilled water, and then dry the cleaned nickel foam in a drying oven at 60°C.

[0029] (4) Cut the dried nickel foam into specific specifications as the positive electrode of the lithium-sulfur battery, use metal lithium as the negative electrode, PE / PP (celgard 2000) as the separator, 1M...

Embodiment 2

[0030] (1) Inject the sulfide recovery solution into the anode chamber of the electrolytic cell, inject 1mol / L NaOH aqueous solution into the cathode chamber, and use conductive graphite and multi-walled carbon nanotube electrodes as the cathode and anode materials respectively. The two chambers are separated by a perfluorosulfonic acid cation exchange membrane, and the sulfide recovery solution is an aqueous solution, Na 2 S is 0.25mol / L, Na 2 CO 3 is 0.15mol / L, and the pH value is 12.

[0031](2) Control the anode voltage to 0.5V vs. SCE, and the electrolysis time to 5h.

[0032] (3) After the electrolysis is completed, the anode is taken out, washed with distilled water, and then the washed multi-walled carbon nanotube electrode is placed in a 60° C. drying oven to dry.

[0033] (4) Cut the dried multi-walled carbon nanotubes into specific specifications as the positive electrode of lithium-sulfur battery, use metal lithium as the negative electrode, PE / PP (celgard 2000)...

Embodiment 3

[0035] (1) Inject the alkaline absorption solution of sulfide into the anode chamber of the electrolytic cell, inject 0.3mol / L NaOH aqueous solution into the cathode chamber, and use conductive graphite and porous carbon electrodes (such as BP2000 electrodes) for the cathode and anode materials respectively. The two chambers are separated by sodiumized perfluorosulfonic acid cation-exchange membranes, and NaHS 0.5wt% in the alkaline absorption solution of sulfide; 2 CO 3 1wt%; Na 2 S15wt%.

[0036] (2) Use cyclic voltammetry to control the potential of the anode sheet to -1.5V-3V vs. SCE electrolysis time is 0.5h.

[0037] (3) After the electrolysis was completed, the anode was taken out, washed with distilled water several times, and then the washed porous carbon electrode was dried in a 60°C drying oven.

[0038] (4) Cut the dried anode into specific specifications as the positive electrode of the lithium-sulfur battery, use metal lithium as the negative electrode, PE / PP...

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 method for preparing a lithium-sulfur battery electrode directly from a hydrogen-sulfide-containing recyclate. According to the invention, the hydrogen-sulfide-containing recyclate is used as a raw material and subjected to electrolysis so as to directly obtain a sulfur-carbon composite material which is used as the positive electrode of a lithium-sulfur battery. Test results prove that the sulfur-carbon composite material used as the positive electrode of the lithium-sulfur battery has good cycle stability.

Description

technical field [0001] The invention belongs to the field of sulfur-containing waste liquid treatment, and more specifically relates to a method for synchronously realizing the recovery of sulfide and the preparation of carbon-sulfur composite materials. Background technique [0002] With the rapid development of economy and society, the issues of improving the utilization rate of fossil energy and protecting the environment have been paid more and more attention by people. Industrial activities closely related to fossil fuels, such as oil and gas exploration, extraction, processing, and post-treatment processes, produce high concentrations of hydrogen sulfide gas. Using sodium hydroxide solution to absorb (alkali washing) oil can effectively remove sulfide, but it is accompanied by a large amount of sulfur-containing waste lye. Typical sulfur-containing waste lye has the characteristics of strong alkalinity (pH>12), high salinity (5-12wt%), and high sulfide concentratio...

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): H01M4/139H01M4/36H01M4/38H01M4/587H01M4/62H01M10/052
CPCH01M4/139H01M4/362H01M4/38H01M4/587H01M4/625H01M10/052Y02E60/10
Inventor 单忠强黄文龙田建华
Owner TIANJIN 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