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

Negative electrode material for zinc secondary battery and preparation method of negative electrode material

A negative electrode material, secondary battery technology, applied in battery electrodes, alkaline battery electrodes, negative electrodes, etc., can solve the problem of unavoidable hydrogen evolution corrosion of zinc negative electrode, low battery coulomb efficiency and discharge specific capacity, and reduced zinc negative electrode cycle performance And life and other issues, to achieve excellent cycle performance and Coulomb efficiency, improve discharge specific capacity, and facilitate large-scale industrial production.

Active Publication Date: 2021-12-10
CENT SOUTH UNIV
View PDF11 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the charge and discharge process, due to the low hydrogen evolution overpotential of carbon materials, it is difficult to avoid the hydrogen evolution corrosion problem of the zinc anode, resulting in low battery Coulombic efficiency and discharge specific capacity (-1 ), much lower than its theoretical specific capacity
Yuan Y.F et al proposed a co-precipitation method to prepare metal Bi-based composite film-modified ZnO composite materials in the literature "Electrochemical performances of Bi based compound film-coated ZnO as anodic materials of Ni–Zn secondary batteries", and the introduction of metal Bi significantly inhibited Hydrogen evolution corrosion is eliminated, but the precipitation method, physical mixing and other methods lead to problems such as uneven metal modification and easy falling off, which reduces the cycle performance and life of the zinc negative electrode.

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
  • Negative electrode material for zinc secondary battery and preparation method of negative electrode material
  • Negative electrode material for zinc secondary battery and preparation method of negative electrode material
  • Negative electrode material for zinc secondary battery and preparation method of negative electrode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] (1) Take 1.165g of zinc oxide and 1.8g of glucose as a carbon source, disperse them in 40mL of deionized water, stir and react at room temperature for 12h, transfer the reacted solution to an airtight container, and keep it warm at 160°C for 4h , after the reaction solution was cooled to room temperature, the solid product was obtained by suction filtration, the product was washed 3 times with absolute ethanol, and dried in a vacuum oven at 80°C for 12 hours to obtain the solid product;

[0045] (2) The solid product obtained in step 1, 0.15 g of soluble metal salt and 1.0 g of additives were dispersed in 40 mL of deionized water, and stirred at room temperature for 12 h. The mass ratio of each component in the soluble metal salt is M1:M2:M3=6:1:1, wherein, M1 is composed of bismuth nitrate and stannous chloride with a mass ratio of 4:0.5; M2 is composed of bismuth nitrate and stannous chloride with a mass ratio of 3:2 Indium nitrate and silver nitrate; M3 is composed o...

Embodiment 2

[0072] (1) Take 1.5g of zinc oxide and 2.3g of glucose, disperse them in 50mL of deionized water, stir and react at room temperature for 14h, transfer the reacted solution to an airtight container, keep it warm at 170°C for 5h, and wait for the reaction After the solution was cooled to room temperature, the solid product was obtained by suction filtration. The product was washed twice with absolute ethanol, and dried in a vacuum oven at 90°C for 11 hours to obtain a solid product;

[0073] (2) The solid product obtained in step 1, 0.19 g of soluble metal salt and 1.3 g of additives were dispersed in 50 mL of deionized water, and stirred at room temperature for 14 h. The mass ratio of each component in the soluble metal salt is M1:M2:M3=6:1.5:1.5, wherein, M1 is composed of bismuth nitrate and stannous chloride with a mass ratio of 4:1; M2 is composed of bismuth nitrate and stannous chloride with a mass ratio of 3:2 Indium sulfate and silver nitrate; M3 is composed of mercury n...

Embodiment 3

[0078] (1) Take 1.75g ​​of zinc oxide, 2.7g of carbon source (glucose and sucrose, the mass ratio is 1:1), disperse it in 60mL of deionized water, stir and react at room temperature for 16h, and transfer the reacted solution to an airtight container within 180°C for 6 hours, and after the reaction liquid was cooled to room temperature, the solid product was obtained by suction filtration. The product was washed 3 times with absolute ethanol, and dried in a vacuum oven at 95°C for 10 hours to obtain a solid product;

[0079] (2) Disperse the solid product obtained in step 1, 0.22 g of soluble metal salt and 1.5 g of additives in 60 mL of deionized water, and stir and react at room temperature for 16 h. The mass ratio of each component in the soluble metal salt is M1:M2:M3=5:1:1.5, wherein, M1 is composed of bismuth chloride and stannous chloride with a mass ratio of 4:2; M2 is composed of a mass ratio of 3: 2.5 indium sulfate and silver nitrate; M3 is composed of mercury nitrat...

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
particle diameteraaaaaaaaaa
porosityaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a negative electrode material for a zinc secondary battery and a preparation method of the negative electrode material. The negative electrode material is of a core-shell structure, the core is zinc oxide, and the shell is amorphous carbon uniformly embedded with metal nanoparticles; the metal nanoparticles are composed of N1, N2 and N3, wherein N1 is at least one of Bi and Sn, N2 is at least one of In and Ag, and N3 is at least one of Hg, Pb and Cd; and the zinc oxide is taken as a raw material, the amorphous carbon embedded with metal nanoparticles coats the surface of the zinc oxide by adopting two-step hydrothermal treatment, and the core-shell-structure negative electrode material for the zinc secondary battery is obtained. According to the negative electrode material for the zinc secondary battery, the zinc oxide serves as the core, the amorphous carbon uniformly embedded with the metal nanoparticles serves as the shell, so that the hydrogen evolution overpotential of the zinc negative electrode is improved, hydrogen evolution corrosion is inhibited, meanwhile, dissolution of active substances can be reduced, dendrite growth and electrode deformation are inhibited, the cycle performance of the battery is remarkably improved, and the service life of the battery is remarkably prolonged.

Description

technical field [0001] The invention discloses a negative electrode material for an alkaline zinc secondary battery and a preparation method thereof, belongs to the field of secondary batteries, and in particular relates to a metal zinc secondary battery. [0002] technical background [0003] Zinc secondary battery has the advantages of high theoretical capacity, stable working voltage, abundant reserves, safety and no pollution, etc. It is considered as a kind of energy storage device with good application prospects, and has become a research hotspot in various countries in recent years. The active material with zinc oxide or metal zinc as the negative electrode will undergo hydrogen evolution corrosion in a strong alkaline electrolyte, thereby reducing the Coulombic efficiency of the battery. At the same time, the dendrite growth of the zinc anode also greatly reduces the discharge capacity and cycle life of the battery, hindering the industrial application of zinc seconda...

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): H01M4/36H01M4/48H01M4/38H01M4/583H01M4/24
CPCH01M4/366H01M4/48H01M4/38H01M4/583H01M4/244H01M2004/027Y02E60/10
Inventor 田忠良郭春程皓朱渊汪滔
Owner CENT SOUTH UNIV
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