Metal oxide coated lithium nickel manganese oxide material, preparation method of metal oxide coated lithium nickel manganese oxide material and lithium ion battery

A metal ion and oxide technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of incompatibility with large-scale production, poor material cycle performance, etc., and achieve adaptation to large-scale production, cycle stability and rate. The effect of good performance and high specific capacity

Active Publication Date: 2012-10-03
CHERY AUTOMOBILE CO LTD
View PDF6 Cites 17 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problems to be solved by the present invention include, for LiNi in the prior art 0.5 mn 1.5 o 4 The material cycle performance is not good, and it is not suitable for large-scale production. To provide a metal oxide-coated LiNi with high specific capacity, good cycle stability and rate performance, and suitable for large-scale production 0.5 mn 1.5 o 4 Material preparation 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
  • Metal oxide coated lithium nickel manganese oxide material, preparation method of metal oxide coated lithium nickel manganese oxide material and lithium ion battery
  • Metal oxide coated lithium nickel manganese oxide material, preparation method of metal oxide coated lithium nickel manganese oxide material and lithium ion battery
  • Metal oxide coated lithium nickel manganese oxide material, preparation method of metal oxide coated lithium nickel manganese oxide material and lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] This embodiment provides a metal oxide-coated LiNi 0.5 mn 1.5 o 4 The preparation method of material, it comprises the following steps:

[0037] Step 1, prepare LiNi by the method for comparative example 0.5 mn 1.5 o 4 Material.

[0038] Step 2, weigh 0.4225g of MnSO 4 ·H 2 O is made into an aqueous solution with a metal ion concentration of 0.5mol / L, and 7.0274g of the above-mentioned LiNi is added thereto 0.5 mn 1.5 o 4 Material. Na as precipitant 2 CO 3 It is configured into a precipitant solution with a mass concentration of 0.8%, and in a stirring state, the precipitant solution is added dropwise to the above-mentioned aqueous solution, wherein Na 2 CO 3 The consumption (amount of substance) is 3.5% more than the amount needed to make all the metal ions in the aqueous solution precipitate, that is, the precipitant is excessive by 3.5% to ensure that the metal ion precipitation is complete. After standing for 2 hours, the precipitate was collected, ce...

Embodiment 2

[0044] This embodiment provides a metal oxide-coated LiNi 0.5 mn 1.5 o 4 The preparation method of material, it comprises the following steps:

[0045] Step 1, prepare LiNi by the method for comparative example 0.5 mn 1.5 o 4 Material.

[0046] Step 2, weigh 0.2451g of MnCl 2 4H 2 O is made into an aqueous solution with a metal ion concentration of 1mol / L, and 8.6067g of the above-mentioned LiNi is added thereto 0.5 mn 1.5 o 4 Material. K will be used as precipitant 2 CO 3 It is configured into a precipitant solution with a mass concentration of 1.2%. In a stirring state, the precipitant solution is added dropwise to the above aqueous solution, wherein K 2 CO 3 (That is, the amount of the precipitating agent) (the amount of the substance) is over 3% to ensure that the metal ion precipitation is complete. After standing for 2 hours, the precipitate was collected, centrifuged, washed 4 times, and dried at 110°C for 12 hours. In an air atmosphere, the precipitate ...

Embodiment 3

[0049] This embodiment provides a metal oxide-coated LiNi 0.5 mn 1.5 o 4 The preparation method of material, it comprises the following steps:

[0050] Step 1, prepare LiNi by the method for comparative example 0.5 mn 1.5 o 4 Material.

[0051] Step 2, take by weighing 0.179g of Mn(NO 3 ) 2 Make an aqueous solution with a metal ion concentration of 0.05mol / L, add 17.3004g of the above-mentioned LiNi to it 0.5 mn 1.5 o 4 Material. (NH 4 ) 2 CO 3 Be configured into a precipitant solution with a mass concentration of 0.09%, and in a stirring state, add the precipitant solution dropwise to the above aqueous solution, wherein (NH 4 ) 2 CO 3 (That is, the amount of precipitant) (the amount of substance) is over 5% to ensure that the precipitation of metal ions is complete. After standing for 2 hours, the precipitate was collected, centrifuged, washed 4 times, and dried at 110°C for 12 hours. In a pure oxygen atmosphere, the precipitate was heated to 450°C at a heat...

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 provides a metal oxide coated lithium nickel manganese oxide material, a preparation method of the metal oxide coated lithium nickel manganese oxide material and a lithium ion battery, belongs to the technical field of the lithium ion battery and can solve the problem that the existing lithium nickel manganese oxide material has poor circulating performance and is unsuitable for large-scale production. The preparation method of the metal oxide coated lithium nickel manganese oxide material, which is provided by the invention, comprises the following steps: preparing aqueous solution of soluble metal salt, adding a lithium nickel manganese oxide material into the aqueous solution and adding a precipitating agent containing carbanion into the aqueous solution to ensure metal ions in the aqueous solution to be precipitated on the material surface of the lithium nickel manganese oxide material to obtain precipitates, wherein the soluble metal salt is soluble nickel salt or soluble manganese salt; and in the oxygen-containing atmosphere, low temperature sintering on the precipitates is carried out to obtain the metal oxide coated lithium nickel manganese oxide material. The lithium nickel manganese oxide material is prepared by the method. An anode of the lithium ion battery provided by the invention comprises the lithium nickel manganese oxide material.

Description

technical field [0001] The invention belongs to the technical field of lithium ion batteries, and in particular relates to a metal oxide-coated lithium nickel manganese oxide material, a preparation method thereof, and a lithium ion battery. Background technique [0002] In recent years, with the increasingly serious energy and environmental problems and the requirements of light-weight electronic products, people's research on lithium-ion batteries has continued to deepen. LiCoO, a commonly used cathode material for commercial lithium-ion batteries 2 It is expensive and toxic, so people have been trying to find its alternatives. Lithium manganate (LiMn) 2 O 4 ) has attracted attention due to its low price and non-toxicity, and adding nickel to lithium manganate can obtain lithium nickel manganese oxide (LiNi 0.5 Mn 1.5 O 4 ) material, LiNi 0.5 Mn 1.5 O 4 There is a 4.7V platform in the charging and discharging process of the material, and the theoretical capacity i...

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): H01M4/1391H01M4/505H01M4/525H01M10/0525
CPCY02E60/122Y02E60/10
Inventor 刘三兵刘云建
Owner CHERY AUTOMOBILE CO LTD
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