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

LASO-coated octahedral structural lithium nickel manganate composite material and preparation method thereof

A technology of lithium nickel manganese oxide and composite materials, which is applied in the field of new energy materials, can solve the problems of battery cycle performance degradation, side reactions, etc., and achieve the effects of reducing oxidation and decomposition reactions, good effect, and easy preparation

Active Publication Date: 2018-11-13
淮安新能源材料技术研究院
View PDF5 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to its high-voltage platform, the general electrolyte will undergo serious side reactions at high potentials (>4.5V), and oxidative decomposition reactions will occur with the surface of the positive electrode, forming a thick layer of positive electrolyte interface film (CEI), Decrease the cycle performance of the battery

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
  • LASO-coated octahedral structural lithium nickel manganate composite material and preparation method thereof
  • LASO-coated octahedral structural lithium nickel manganate composite material and preparation method thereof
  • LASO-coated octahedral structural lithium nickel manganate composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Preparation of 0.2% LASO-coated lithium nickel manganese oxide cathode material

[0026] Accurately weigh aluminum nitrate nonahydrate and citric acid monohydrate in ethanol-water solution according to coating amount and stoichiometric ratio, and magnetically stir until dissolved, wherein the volume ratio of ethanol to water in ethanol-water solution is 1:1, Al 3+ : The ratio (molar ratio) of citric acid to 1:1; Weigh 5g of lithium nickel manganese oxide positive electrode material in Comparative Example 1 in the above solution, stir for 4h to disperse; disperse ethyl silicate at a volume ratio of 1:10 In ethanol, slowly add dropwise to the above solution according to the coating amount and stoichiometric ratio, and continue to stir; disperse ethyl silicate in ethanol according to the coating amount stoichiometric ratio, slowly add dropwise to the above solution, continue Stir for 2 hours; use 1mol / L LiOH solution to adjust the pH of the solution to about 11, and contin...

Embodiment 2

[0028] Preparation of 0.4%LASO-coated lithium nickel manganese oxide cathode material

[0029] Accurately weigh aluminum nitrate nonahydrate and citric acid monohydrate in ethanol-water solution according to coating amount and stoichiometric ratio, and magnetically stir until dissolved, wherein the volume ratio of ethanol to water in ethanol-water solution is 1:1, Al 3+ : citric acid is the ratio (molar ratio) of 1:1; Take by weighing 5g lithium nickel manganese oxide cathode material in the above-mentioned solution in comparative example 1, stir 4h to make it disperse; Ethyl silicate is dispersed in ethanol, according to package The coating amount and stoichiometric ratio were slowly added to the above solution drop by drop, and continued to stir for 2 hours; adjusted the pH of the solution to about 11 with 1mol / L LiOH solution, and continued to stir for 1 hour; Covering amount and stoichiometric ratio Lithium excess 5% is mixed with lithium carbonate and poured into a ball mil...

Embodiment 3

[0031] Preparation of 0.6%LASO-coated lithium nickel manganese oxide cathode material

[0032] Accurately weigh aluminum nitrate nonahydrate and citric acid monohydrate in ethanol-water solution according to coating amount and stoichiometric ratio, and magnetically stir until dissolved, wherein the volume ratio of ethanol to water in ethanol-water solution is 1:1, Al 3+ : citric acid is the ratio (molar ratio) of 1:1; Take by weighing 5g lithium nickel manganese oxide cathode material in the above-mentioned solution in comparative example 1, stir 4h to make it disperse; Ethyl silicate is dispersed in ethanol, according to package The coating amount and stoichiometric ratio were slowly added to the above solution drop by drop, and continued to stir for 2 hours; adjusted the pH of the solution to about 11 with 1mol / L LiOH solution, and continued to stir for 1 hour; Covering amount and stoichiometric ratio Lithium excess 5% is mixed with lithium carbonate and poured into a ball m...

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
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a LASO-coated octahedral structural lithium nickel manganate composite material and a preparation method thereof. A matrix is a regularly octahedral structural lithium nickel manganate positive electrode material and is subjected to layer-by-layer coating modification by a Li-Al-Si-O inorganic solid electrolyte, the capacity is improved, the cycling performance is improved,and especially, the electrochemical high temperature performance is improved significantly.

Description

technical field [0001] The invention belongs to the technical field of new energy materials, and more specifically relates to a nanometer Li-Al-Si-O (LASO) inorganic solid electrolyte coated octahedral structure lithium nickel manganese oxide (LNMO) composite material and a preparation method. Background technique [0002] At present, there is a shortage of traditional fossil energy and serious environmental pollution. It is no longer feasible to rely solely on traditional energy to drive economic development. Electric vehicles and hybrid electric vehicles have begun to come into people's field of vision. Lithium-ion power battery is currently recognized as the most promising vehicle battery. Compared with traditional secondary batteries, lithium-ion power batteries have significant advantages such as high energy density, long cycle life, high working voltage, and no memory effect, and have quickly become the object of research by researchers. Common lithium batteries are c...

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): H01M4/36H01M4/505H01M4/525H01M4/62H01M10/0525B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M4/366H01M4/505H01M4/525H01M4/62H01M4/624H01M4/628H01M10/0525Y02E60/10
Inventor 史灵琪刘耀春卢鹏李明刘清泉魏奇张远尹延谋沈浪
Owner 淮安新能源材料技术研究院
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