Method of producing silicon doped LiMn2O4 lithium ion battery anode material

A technology for lithium ion batteries and cathode materials, which is applied in the field of preparation of cathode materials for lithium ion batteries, can solve problems such as the reduction of theoretical capacity of spinel lithium manganate materials, and achieve easy control of process reactions, cost reduction, and regular crystal crystal shape. Effect

Inactive Publication Date: 2010-11-17
LUDONG UNIVERSITY +1
View PDF5 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention discloses a method for preparing Si-doped LiMn by using tetravalent Si ions as doping ions to solve the unfavorable factors of reducing the theoretical capacity of spinel lithium manganese oxide materials caused by common ion doping. 2 o 4 Lithium-ion battery cathode material method

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
  • Method of producing silicon doped LiMn2O4 lithium ion battery anode material
  • Method of producing silicon doped LiMn2O4 lithium ion battery anode material
  • Method of producing silicon doped LiMn2O4 lithium ion battery anode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] According to the ratio of molar ratio Li / Mn=1 / 2, take by weighing 0.6894g of analytical pure lithium nitrate and 4.7793g of manganese acetate and dissolve in 20ml of absolute ethanol to obtain a transparent solution, and then according to the molar ratio Li:Mn:Si=1:1.92 : 0.02 ratio to pipette 4 milliliters of 0.05mol / L prepared tetramethylsilane ethanol solution, add dropwise in Li, Mn mixed solution under stirring, after mixing uniformly, it becomes a transparent solution; then under infrared lamp, heat And gradually remove the ethanol solvent, dry to form a white gel precursor; the obtained precursor is heated to 400°C at a heating rate of 5°C / min and kept for 5 hours, so that the raw material is pre-decomposed into an amorphous mixed oxidation of Li, Mn, and Si. Naturally cool to room temperature, take out and grind thoroughly; then raise the temperature of the pre-decomposed product to 700 degrees at a rate of 5°C / min, keep it warm for 10 hours to fully crystallize ...

Embodiment 2

[0023]According to the molar ratio Li / Mn=1 / 2, take by weighing analytically pure lithium acetate 1.0201g and manganese acetate 4.7793 and dissolve in 20ml absolute ethanol to obtain a transparent solution, then according to the ratio of molar ratio Li:Mn:Si=1:1.95:0.05 Pipette 5.26 milliliters of 0.095 mol / L vinyltriethoxysilane ethanol solution that has been prepared, and add Li and Mn mixed solution drop by drop under stirring, and it becomes a transparent solution after mixing evenly; then, under infrared lamp, heat and Gradually remove the ethanol solvent and dry to form a white gel precursor; the obtained precursor is heated to 400°C at a heating rate of 5°C / min and kept for 4 hours to pre-decompose the raw material into amorphous mixed oxides of Li, Mn, and Si , naturally cool to room temperature, take out and grind fully; then raise the pre-decomposed product to 800°C at a rate of 5°C / min, keep it warm for 10 hours to fully crystallize Li, Mn, Si, then cool the product n...

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 preparation method of Si doping LiMn2O4 lithium ion battery anode material. The invention is characterized in that: take manganese salt, lithium salt, and organosilane as raw materials, and take ethanol as solvent to obtain homogeneous solution of LiMn, Si according to the molar ratio(x is less than or equal to 0.1) of LiMn2-xSixO4, so as to prepare uniform precursor; and then prepare Si doping LiMn2O4 lithium ion battery anode material at high temperature through the method of solid-state incremental heating. The invention can settle the common problem of decreased theoretical capacity of spinel lithium manganese caused by ion doping, and the product prepared by the invention has structured crystal form, single phase, no silicon dioxide impurity and settles the difficulty of effective si- ion doping technically.

Description

technical field [0001] The invention relates to a preparation method of a positive electrode material of a lithium ion battery. In particular, it relates to a preparation method of ion-doped lithium manganese oxide for lithium-ion batteries. Background technique [0002] At present, with the rapid development of electronic technology, digital electronic instruments are increasingly miniaturized and portable, such as mobile phones, notebook computers, MP3 and other products that are closely related to our lives, so people put forward more requirements on the performance of chemical power sources (batteries). high demands. Among many systems, lithium-ion batteries stand out due to their advantages of high working voltage, high energy density and light weight, and are valued by countries all over the world. In 2005, the global output of lithium-ion batteries was 1.8 times that of nickel-metal hydride batteries and 4 times that of nickel-cadmium batteries. It is the first choi...

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): C01D15/00H01M4/04B01J19/00C01G1/02C01G45/00H01M4/48H01M4/58H01M4/505H01M4/62
CPCY02E60/12Y02E60/10
Inventor 徐彦宾高善民孔令艳王玉宝黄百勇许璞
Owner LUDONG UNIVERSITY
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