An electrode and sodium-ion battery

A sodium-ion battery and electrode technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve problems such as limited batch use, unsatisfactory battery life, and negative electrode collapse and damage, and achieve excellent electrical performance and safety performance.

Active Publication Date: 2021-08-27
东莞格林德能源有限公司
View PDF9 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, whether it is a lithium-ion battery or a sodium-ion battery, there is a common problem when using pure metals or alloys as the negative electrode, that is, the volume of the negative electrode expands rapidly during charging. Ideal, thus limiting the bulk use of such materials as anode materials

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Fill the reaction chamber with argon, add 5 kg of antimony and 5 kg of sodium into the furnace, heat to 650 ° C for 2 hours, pour the molten slurry into the mold, cool to room temperature, remove the alloy blank, cut and punch it into an electrode shape, put it into 50 kg of absolute ethanol, soak it for 4 hours, take it out of the reaction chamber and dry it to get the porous antimony alloy electrode. Then use sodium-based Prussian blue as the positive electrode material for sodium-ion batteries, and make positive sheets through slurry mixing, coating, rolling, and slitting, and then use porous antimony alloy electrodes as negative electrodes through lamination, welding, packaging, and baking. A batch of 10Ah sodium-ion power batteries were prepared through processes such as liquid injection, formation, and volume separation.

Embodiment 2

[0014] Fill the reaction chamber with argon, add 7kg of antimony and 3kg of sodium into the furnace, heat to 650°C for 2 hours, pour the molten slurry into the mold, cool to room temperature, remove the alloy blank, cut and punch it into an electrode shape, put it into 50 kg of absolute ethanol, soak it for 4 hours, take it out of the reaction chamber and dry it to get the porous antimony alloy electrode. Then use sodium-based Prussian blue as the positive electrode material for sodium-ion batteries, and make positive sheets through slurry mixing, coating, rolling, and slitting, and then use porous antimony alloy electrodes as negative electrodes through lamination, welding, packaging, and baking. A batch of 10Ah sodium-ion power batteries were prepared through processes such as liquid injection, formation, and volume separation.

Embodiment 3

[0016] Fill the reaction chamber with argon, add 6 kg of antimony and 4 kg of sodium into the furnace, heat to 650 ° C for 2 hours, pour the molten slurry into the mold, cool to room temperature, remove the alloy blank, cut and punch it into an electrode shape, put it into 50 kg of absolute ethanol, soak it for 4 hours, take it out of the reaction chamber and dry it to get the porous antimony alloy electrode. Then use sodium-based Prussian blue as the positive electrode material for sodium-ion batteries, and make positive sheets through slurry mixing, coating, rolling, and slitting, and then use porous antimony alloy electrodes as negative electrodes through lamination, welding, packaging, and baking. A batch of 10Ah sodium-ion power batteries were prepared through processes such as liquid injection, formation, and volume separation.

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 novel alloy electrode and a sodium ion battery thereof. A large number of holes are made on an antimony alloy by a special method. When the antimony alloy is used as a negative electrode for sodium ions, the sodium ions enter the inside of the electrode along the holes after charging and come out of the holes when discharging. , and return to the positive electrode through the electrolyte, so as to store sodium ions to complete the battery charge and discharge function. Using sodium-based Prussian blue as the positive electrode material and the porous antimony alloy of the present invention as the negative electrode material, the porous antimony alloy negative electrode sheet is prepared by slurry mixing, coating, rolling, and slitting, and is laminated, welded, packaged, and baked , liquid injection, formation, and volume separation to obtain a sodium ion battery. In the present invention, the sodium metal and the metal electrode are first fused, and then the sodium is removed, leaving a large number of holes on the electrode. Since these holes are originally used to store sodium, when the sodium ion battery is charged, sodium can effectively re-enter these holes. Therefore, there is no expansion problem of the electrode, and the prepared sodium ion battery has excellent electrical performance and safety performance.

Description

technical field [0001] The invention belongs to the field of new energy batteries, and in particular relates to a novel porous antimony alloy electrode and a sodium ion battery thereof. Background technique [0002] Since the 1980s, sodium-ion batteries have been researched and developed together with lithium-ion batteries, but because their performance is far from that of lithium-ion batteries, they have not been popularized and applied in batches. However, lithium is a rare metal. After years of development, lithium resources are becoming increasingly depleted. Compared with lithium, the content of sodium on the earth is much richer. So now sodium-ion batteries have returned to the foreground and are increasingly valued. [0003] Since the radius of sodium ions is much larger than that of lithium ions, electrodes such as graphite commonly used in lithium-ion batteries cannot be used in sodium-ion batteries. Everyone has tried to use amorphous carbon as the negative electr...

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): H01M4/134H01M4/1395H01M4/38H01M10/054
CPCH01M4/134H01M4/1395H01M4/38H01M10/054Y02E60/10
Inventor 李义李国敏刘小虹
Owner 东莞格林德能源有限公司
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