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

Self-repairing microencapsulated lithium ion battery electrode material and preparation method thereof, lithium ion battery negative electrode and lithium ion battery

A self-repairing microcapsule, lithium-ion battery technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of capacity decay and easy shedding, and achieve the effects of buffer volume expansion, stable chemical properties, and stable cycle performance.

Active Publication Date: 2018-12-28
ANHUI NORMAL UNIV
View PDF3 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Another important challenge of liquid electrode materials for lithium batteries is the problem of liquid loading. The traditional method loads liquid droplets on the substrate (such as carbon fibers, carbon nanotubes, etc.), and the battery is easy to fall off during charging and discharging, and the capacity decays seriously.

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
  • Self-repairing microencapsulated lithium ion battery electrode material and preparation method thereof, lithium ion battery negative electrode and lithium ion battery
  • Self-repairing microencapsulated lithium ion battery electrode material and preparation method thereof, lithium ion battery negative electrode and lithium ion battery
  • Self-repairing microencapsulated lithium ion battery electrode material and preparation method thereof, lithium ion battery negative electrode and lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A preparation method of a self-repairing microcapsule lithium-ion battery electrode material, comprising the following steps:

[0043] 1) Mix 0.1g of liquid alloy particles with 4g of n-hexadecane, and ultrasonically disperse at room temperature for 20 minutes to obtain a mixed solution;

[0044] 2) Add 50mL mixed aqueous solution containing 1.25g urea, 0.25g resorcinol and 0.125g ammonium chloride to the aqueous solution of 2.5wt% polyethylene maleic anhydride copolymer, mechanically stir and mix, add Triethanolamine adjusts the pH to 3.5, stirs until completely dissolved, and mixes; a mixed solution is obtained;

[0045] 3) Put the mixed solution obtained in step 2) into a constant temperature water bath and heat it to 40°C, keep it warm, then add the mixed solution prepared in 1) into the mixed solution obtained in step 2), and mechanically stir at a stirring rate of 800rpm After 0.5h, add 3.1g of formaldehyde solution drop by drop, continue mechanical stirring at 8...

Embodiment 2

[0051] A method for preparing a carbonized liquid alloy capsule, comprising the following steps:

[0052] 1) Mix 0.2 g of liquid alloy nanoparticles with 4.5 g of n-hexadecane, and ultrasonically disperse at room temperature for 20 minutes to obtain a mixed solution;

[0053] 2) Add 50mL mixed aqueous solution containing 1.25g urea, 0.25g resorcinol and 0.125g ammonium chloride into the aqueous solution of 25mL polyethylene maleic anhydride copolymer with a concentration of 3wt%, mechanically stir and mix, add three Ethanolamine adjusts the pH to 3.5, stirs and mixes, and after all dissolves, a mixed solution is obtained;

[0054] 3) Put the mixed solution obtained in step 2) into a constant temperature water bath and heat it to 45°C, keep it warm, then add the mixed solution prepared in step 2) into the mixed solution obtained in step 2), and mechanically stir at a stirring rate of 850rpm After 0.5h, 3.2g of formaldehyde solution was added dropwise, the stirring rate was 850...

Embodiment 3

[0060] A preparation method of a self-repairing microcapsule lithium-ion battery electrode material, comprising the following steps:

[0061] 1) Mix 0.3g of liquid alloy nanoparticles with 5g of n-hexadecane, and ultrasonically disperse at room temperature for 20min to obtain a mixed solution;

[0062] 2) Add the 50mL mixed aqueous solution containing 1.25g urea, 0.25g resorcinol and 0.125g ammonium chloride into the aqueous solution of 25mL polyethylene maleic anhydride copolymer with a concentration of 3.5wt%, stir mechanically, and pass through three Adjust the pH to 3.5 with ethanolamine, and stir until completely dissolved to obtain a mixed solution;

[0063] 3) Put the mixed solution obtained in step 2) into a constant temperature water bath and heat it to 50°C, keep it warm, then add the mixed solution prepared in 1) into the mixed solution obtained in step 2), and mechanically stir at a stirring rate of 900rpm After 0.5h, add 3.3g of formaldehyde solution drop by drop...

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
Discharge capacityaaaaaaaaaa
Login to View More

Abstract

The invention provides a self-repairing microencapsulated lithium ion battery electrode material and a preparation method thereof, a lithium ion battery negative electrode and a lithium ion battery. Liquid alloy particles are mixed with n-hexadecane, liquid alloy particles are used as anode active material, and urea, resorcinol, ammonium chloride and polyvinyl maleic anhydride copolymer are reacted to form resin as shell of capsule. Compared with the prior art, the capsule prepared by the invention encapsulates the liquid alloy particles, has stable chemical properties, and is carbonized at ahigh temperature in an argon atmosphere to finally obtain a carbonized liquid alloy material. The capsule structure can well contain the volume change of liquid alloy particles in the charge and discharge process, greatly improve the structural integrity of liquid alloy particles, and has the function of self-repair. Using this material as the cathode of lithium ion battery, it has the characteristics of high capacity and stable cycling performance. The method provided by the invention is simple, has high yield and good controllability.

Description

technical field [0001] The invention belongs to the preparation of inorganic composite materials in the field of new energy technology, and specifically relates to a self-repairing microcapsule lithium-ion battery electrode material and a preparation method thereof, a lithium-ion battery negative electrode and a lithium-ion battery. Background technique [0002] The battery capacity and its cycle stability are affected by the volume expansion / shrinkage of the electrode material, resulting in electrode cracking and cutting off the electron transport path, active material detachment loss from the current collector, etc., and the performance is greatly attenuated. The traditional solutions are mainly: composite electrochemically active materials and inactive materials; prepare nanostructured electrodes; increase materials that buffer volume changes, etc. These methods improve battery stability and life to a certain extent, but adding a large amount of inactive materials greatly...

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
IPC IPC(8): H01M4/36H01M4/38H01M4/62H01M10/0525
CPCH01M4/362H01M4/387H01M4/62H01M10/0525Y02E60/10
Inventor 刘金云吴勇李金金程孟莹丁颖艺黄家锐
Owner ANHUI NORMAL 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