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

Preparation method of sulfur and nitrogen double-doped lithium air battery positive electrode catalyst

A lithium-air battery, double-doped technology, applied in battery electrodes, carbon preparation/purification, fuel cell half-cells and secondary battery half-cells, etc., can solve problems such as poor catalytic activity and poor stability

Inactive Publication Date: 2021-04-20
HARBIN INST OF TECH
View PDF1 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for preparing a lithium-air battery cathode catalyst doped with sulfur and nitrogen in order to solve the problems of poor stability and poor catalytic activity in the current lithium-air battery carbon-based catalysts.

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 method of sulfur and nitrogen double-doped lithium air battery positive electrode catalyst
  • Preparation method of sulfur and nitrogen double-doped lithium air battery positive electrode catalyst
  • Preparation method of sulfur and nitrogen double-doped lithium air battery positive electrode catalyst

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0022] Specific implementation mode 1: This implementation mode records a method for preparing a sulfur-nitrogen double-doped lithium-air battery cathode catalyst. The method is specifically:

[0023] Step 1: After mixing the raw materials containing sulfur and nitrogen with the carbon matrix in a solvent, transfer them to a closed reaction vessel, and perform solvothermal reaction at 150-260°C to form a precursor dispersion;

[0024] Step 2: The precursor dispersion liquid is subjected to centrifugal washing, vacuum-dried, and then subjected to high-temperature pyrolysis under a protective atmosphere to obtain lithium-air battery cathode catalyst powder.

[0025] The air positive electrode of the present invention uses carbon material as a matrix material, and raw materials containing sulfur and nitrogen elements interact with the carbon matrix through chemical reactions to form a lithium-air battery positive electrode catalyst doped with sulfur and nitrogen elements.

specific Embodiment approach 2

[0026] Specific embodiment two: the preparation method of a sulfur-nitrogen double-doped lithium-air battery positive electrode catalyst described in specific embodiment one, the raw material containing two elements of sulfur and nitrogen contains two elements of sulfur and nitrogen at the same time of organic matter.

specific Embodiment approach 3

[0027] Specific embodiment three: the preparation method of a kind of sulfur, nitrogen double-doped lithium-air battery anode catalyst described in specific embodiment two, the organic matter that contains sulfur, nitrogen two kinds of elements at the same time is thioformamide, thiosulfate One of acetamide, thiophosphoramide, or thiosemicarbazide.

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 preparation method of a sulfur and nitrogen double-doped lithium air battery positive electrode catalyst, and belongs to the technical field of chemical power supplies. For solving the problems of poor stability, poor catalytic activity and the like of an existing lithium air battery carbon-based catalyst, the preparation method comprises the steps: mixing raw materials containing sulfur and nitrogen elements with a carbon matrix in a solvent, transferring the mixture into a closed reaction container, and carrying out solvothermal reaction at the temperature of 150-260 DEG C to form a precursor dispersion liquid; and carrying out centrifugal washing on the precursor dispersion liquid, carrying out vacuum drying, and carrying out high-temperature cracking in a protective atmosphere to obtain the lithium air battery positive electrode catalyst. The bifunctional positive electrode catalyst is a carbon-based material formed by doping two non-metallic elements with similar electronegativity, can be used for an organic system, an all-solid-state lithium air battery system, a water system lithium air battery system and a water / non-water mixed system lithium air battery system, effectively reduces the charge-discharge overpotential, and improves the cycle stability of the battery.

Description

technical field [0001] The invention belongs to the technical field of chemical power sources, and in particular relates to a preparation method of a lithium-air battery cathode catalyst double-doped with sulfur and nitrogen. Background technique [0002] Since Japan's Sony Corporation developed the first commercial lithium-ion battery in 1991, the practical application of lithium-ion batteries has been greatly promoted, not only widely used in aerospace, satellite, missile and other special equipment fields, but also widely used in civilian fields such as electric Automobiles, portable charging devices, and flexible wearable devices, etc. In recent years, with the continuous expansion of the application of batteries in the field of energy storage, higher requirements have been put forward for their energy density, rate performance and cycle life. Among the current commercial batteries, the most commonly used lithium-ion batteries have problems such as small theoretical cap...

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): C01B32/05H01M4/90H01M12/08
CPCY02E60/10
Inventor 尹鸽平孙宝玉钱正义左朋建马玉林杜春雨
Owner HARBIN INST 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