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

Preparation method of silicon-based lithium ion battery negative electrode material and silicon-based lithium ion battery negative electrode material prepared by method

A negative electrode material and ion battery technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of poor cycle stability of silicon-based negative electrodes, and achieve the effects of maintaining stability, high electrical and thermal conductivity, and alleviating volume expansion

Inactive Publication Date: 2018-09-28
SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
View PDF6 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems of poor cycle stability of silicon-based negative electrodes in the prior art, the present invention aims to provide a method for preparing a silicon-based lithium-ion battery negative electrode material and the resulting silicon-based lithium-ion battery negative electrode material

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

[0021] Step a, weigh 50 mg of graphene oxide (10 μm) material, dissolve it in 4.95 g of deionized water and stir for 30 min to fully dissolve to obtain graphene oxide slurry (1wt.%);

[0022] Step b, adding 50 mg of aniline solution to the graphene oxide slurry in a, and continuously stirring for 10 min;

[0023] In step c, add 143 mg (wt.70%) of phytic acid solution to the slurry in b, and continue stirring for 10 minutes;

[0024] Step d, weigh 500mg of Si NPs (Si nanoparticles) (200nm), add it to the mixed slurry stirred in c, and keep stirring for 1h;

[0025] In step e, add 50 mg of ammonium persulfate to the dispersed d slurry, and stir for 12 hours to obtain a uniformly dispersed slurry;

[0026] Step f, evenly coat the slurry on the copper foil, dry at 80°C for 12 hours, and roll to obtain a surface density of 0.9mg / cm 2 the electrodes.

[0027] Step g, electrode assembly, with electrolyte 1M LiBF 4 As the solute, dimethyl carbonate / dihexyl carbonate (1:1) as the s...

Embodiment 2

[0030] Step a, weigh 10 mg of graphene oxide (20 μm) material, dissolve in 0.99 g of deionized water and stir for 2 h to fully dissolve to obtain graphene oxide slurry (1wt.%);

[0031] Step b, adding 50 mg of aniline solution to the graphene oxide slurry in a, and continuously stirring for 10 min;

[0032] In step c, add 143 mg (wt.70%) of phytic acid solution to the slurry in b, and continue stirring for 10 minutes;

[0033] Step d, weigh 200 mg of Si NPs (20nm), add it to the mixed slurry stirred in c, and continue stirring for 10 min;

[0034] In step e, add 20 mg of ammonium persulfate to the dispersed d slurry, and stir for 12 hours to obtain a uniformly dispersed slurry;

[0035] Step f, evenly coat the slurry on the copper foil, dry at 80°C for 12 hours, and roll to obtain a surface density of 1.5 mg / cm 2 the electrodes.

[0036] Step g, electrode assembly, electrolyte with 1M LiPF 6 As the solute, dimethyl carbonate / dihexyl carbonate (1:1) as the solvent. Assembl...

Embodiment 3

[0039] In step a, weigh 200 mg of graphene oxide (5 μm) material, dissolve it in 4.8 g of deionized water and stir for 10 min to fully dissolve to obtain graphene oxide slurry (4wt.%);

[0040] Step b, adding 50 mg of aniline solution to the graphene oxide slurry in a, and continuously stirring for 10 min;

[0041] In step c, add 143 mg (wt.70%) of phytic acid solution to the slurry in b, and continue stirring for 10 minutes;

[0042] Step d, weigh 1000mg of Si NPs (200nm), add it to the mixed slurry stirred in c, and keep stirring for 2h;

[0043] In step e, add 50 mg of ammonium persulfate to the dispersed d slurry, and stir for 12 hours to obtain a uniformly dispersed slurry;

[0044] Step f, evenly coat the slurry on the copper foil, dry at 80°C for 12 hours, and roll to obtain a surface density of 0.9mg / cm 2 the electrodes.

[0045] Step g, electrode assembly, with electrolyte 1M LiTFSI(LiN(SO 2 CF 3 )) as the solute, and ethylene carbonate / acetonitrile (1:1) as the ...

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
Horizontal sizeaaaaaaaaaa
Diameteraaaaaaaaaa
Login to View More

Abstract

The invention relates to a preparation method of a silicon-based lithium ion battery negative electrode material. The preparation method comprises the steps of dissolving graphene oxide in water to obtain graphene oxide paste; adding an aniline monomer in the graphene oxide paste to obtain first mixed paste; adding phytic acid in the first mixed paste to obtain second mixed paste; adding silicon nano particles in the second mixed paste to obtain third mixed paste; adding an initiator in the third mixed paste to obtain fourth mixed paste; and coating and drying the fourth mixed paste directly to obtain the silicon-based lithium ion battery negative electrode material. The invention further provides the silicon-based lithium ion battery negative electrode material prepared by the mentioned method. The silicon-based lithium ion battery negative electrode material has a polyaniline skeleton porous microstructure wrapped by graphene oxide and stuck with silicon nano particles. The preparation method is simple, the production process is highly safe, the raw materials are abundant, the production cost is low, and the preparation method can be used for large-scale production.

Description

technical field [0001] The invention relates to the preparation of a silicon-based negative electrode material for a lithium-ion battery, more particularly to a preparation method for a silicon-based lithium-ion battery negative electrode material and the silicon-based lithium-ion battery negative electrode material obtained therefrom. Background technique [0002] Compared with other secondary batteries, lithium-ion batteries have the characteristics of high energy density, high cycle performance, and low cost, and are currently widely used in the field of high-energy energy storage. With the development of science and technology, people's demand for energy density in energy storage applications is getting higher and higher. Due to the limitations of materials used in lithium-ion batteries, obtaining lithium-ion battery performance with higher energy density has become the goal of many researches and technological breakthroughs. The main difficulty. Among them, the anode m...

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): H01M4/36H01M4/38H01M4/583H01M10/0525
CPCH01M4/362H01M4/386H01M4/583H01M10/0525Y02E60/10
Inventor 田素云谢晓华丁古巧夏保佳
Owner SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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