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

Method for preparing lithium ion battery cathode material

A technology for lithium-ion batteries and negative electrode materials, applied in battery electrodes, secondary batteries, circuits, etc., can solve problems such as poor cycle performance and unstable structure of negative electrode materials, achieve excellent electrical properties, improve electrochemical reaction rates, and operate Convenient and simple effect

Inactive Publication Date: 2016-05-04
QILU UNIV OF TECH
View PDF4 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the disadvantages of unstable structure and poor cycle performance of lithium-ion battery anode materials in the prior art, the present invention proposes a Fe with a special structure 3 o 4 Preparation method of composite 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

[0022] (1) Dissolve 2.1g of ferric chloride·hexahydrate, 2.4g of anhydrous sodium acetate and 0.35g of sodium citrate in 40ml of ethylene glycol, and ultrasonically disperse for 1 hour to form a uniform suspension. The suspension was mechanically stirred at room temperature for 1 hour, and then added into a 100 ml reaction kettle to react at 180° C. for 10 hours. The precipitate was separated by a magnet, washed three times with absolute ethanol and distilled water successively, and dried at 40°C for 8 hours to obtain Fe 3 o 4 Nanoparticles;

[0023] (2) Mix 150ml of absolute ethanol and 10ml of ammonia water evenly, then add 5ml of tetraethyl orthosilicate dropwise in 25 minutes, react at 25°C for 10 hours, wash with absolute ethanol and distilled water for 3 times in turn, 40°C Drying for 10 hours under the hood yields SiO 2 Nanoparticles;

[0024] (3) Fe obtained from step (1) 3 o 4 0.15g, 100ml of absolute ethanol and 6ml of ammonia water were mixed and stirred evenl...

Embodiment 2

[0030] (1) Dissolve 1.8g of ferric chloride·hexahydrate, 2.0g of anhydrous sodium acetate and 0.3g of sodium citrate in 50ml of ethylene glycol, and ultrasonically disperse for 1 hour to form a uniform suspension. The suspension was mechanically stirred at room temperature for 2 hours, and then added into a 100 ml reaction kettle to react at 180° C. for 12 hours. The precipitate was separated by a magnet, washed three times with absolute ethanol and distilled water successively, and dried at 40°C for 10 hours to obtain Fe3 o 4 Nanoparticles;

[0031] (2) Mix 120ml of absolute ethanol and 8ml of ammonia water evenly, then add 4ml of tetraethyl orthosilicate dropwise in 20 minutes, react at 30°C for 10 hours, wash with absolute ethanol and distilled water for 3 times in turn, at 40°C and dried for 12 hours to obtain SiO 2 Nanoparticles;

[0032] (3) Fe obtained from step (1) 3 o 4 0.2g, 150ml of absolute ethanol and 8ml of ammonia water were mixed and stirred evenly. After ...

Embodiment 3

[0038] (1) Dissolve 2.5g of ferric chloride·hexahydrate, 3.0g of anhydrous sodium acetate and 0.5g of sodium citrate in 60ml of ethylene glycol, and ultrasonically disperse for 1 hour to form a uniform suspension. The suspension was mechanically stirred at room temperature for 1 hour, and then added into a 150 ml reaction kettle and reacted at 200° C. for 10 hours. The precipitate was separated by a magnet, washed three times with absolute ethanol and distilled water successively, and dried at 40°C for 12 hours to obtain Fe 3 o 4 Nanoparticles;

[0039] (2) Mix 150ml of absolute ethanol and 15ml of ammonia water evenly, then add 5ml of tetraethyl orthosilicate dropwise in 30 minutes, react at 25°C for 12 hours, wash with absolute ethanol and distilled water for 3 times in turn, at 40°C and dried for 12 hours to obtain SiO 2 Nanoparticles;

[0040] (3) Fe obtained from step (1) 3 o 4 0.12g, 80ml of absolute ethanol and 5ml of ammonia water were mixed and stirred evenly. A...

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 method for preparing a lithium ion battery cathode material. The cathode material is a composite microsphere of a special yolk structure, the nuclear layer of the composite microsphere is Fe3O4, the shell layer of the composite microsphere is a C-N layer containing mesoporous, and a cavity formed after etching is located between the nuclear layer and the shell layer. The preparing method comprises the steps of firstly, synthesizing SiO2 nano particles with the sol-gel method, and synthesizing Fe3O4 nano particles with the hydrothermal method; then coating Fe3O4 with a layer of SiO2, and coating the SiO2 layer with a composite shell composed of SiO2 nano particles and melamine resin; finally, obtaining the composite microsphere of the special yolk structure through calcination and etching. The material is novel in structure, the volume effect of the Fe3O4 particles can be inhibited by the cavity, the lithium ion diffusion velocity can be increased through the mesoporous so that the electrochemical reaction rate can be increased, and multiplying power and cycle performance can also be improved while the conductivity and specific capacity of the material are improved.

Description

technical field [0001] The invention belongs to the technical fields of energy and lithium-ion batteries, and in particular relates to a preparation method of a lithium-ion battery negative electrode material. Background technique [0002] In recent years, due to its stable charge-discharge cycle performance, graphite has a theoretical specific capacity of 372mAhg ?1 , has been widely used in the research of lithium-ion battery anode materials, but with the development of science and technology and electronic products, the existing power storage equipment has been difficult to meet the new market demand. The data show that nanoscale transition metal oxides (M x o y , M=Mn, Fe, Co, Ni, etc.) The theoretical specific capacity is high, and the development space as a new energy material is large. where Fe 3 o 4 Theoretical capacity is 924mAhg ?1 , good stability, cheap price, and wide sources, it is gradually being used as anode material for lithium-ion batteries. But Fe ...

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): H01M4/48H01M4/36H01M4/38H01M4/62H01M10/0525
CPCH01M4/366H01M4/38H01M4/483H01M4/62H01M10/0525Y02E60/10
Inventor 刘伟良杨婷婷赵丹
Owner QILU UNIV 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