Check patentability & draft patents in minutes with Patsnap Eureka AI!

Composite modified lithium-rich manganese-based positive electrode material as well as preparation method and application thereof

A lithium-rich manganese-based cathode material technology, which is applied to battery electrodes, structural parts, electrical components, etc., can solve the problems of low first-round discharge specific capacity, poor cycle performance, and poor rate performance of lithium-rich manganese-based cathode materials. Achieve the effects of inhibiting irreversible migration, fast charge and discharge, and excellent rate performance

Pending Publication Date: 2022-07-22
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, lithium-rich manganese-based cathode materials still have the problems of low first-cycle discharge specific capacity, poor rate performance, and poor cycle performance.

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
  • Composite modified lithium-rich manganese-based positive electrode material as well as preparation method and application thereof
  • Composite modified lithium-rich manganese-based positive electrode material as well as preparation method and application thereof
  • Composite modified lithium-rich manganese-based positive electrode material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0044] The application also provides a method for preparing a composite modified lithium-rich manganese-based positive electrode material, comprising the following steps:

[0045] A) The transition metal oxide precursor Ni x Co y Mn z CO 3 Perform ball milling with a lithium source, and perform segmental heat treatment on the obtained homogeneous mixture to obtain the original lithium-rich manganese-based cathode material; x+y+z=1, x≥0, y≥0, z≥0 and x, y, z is not 0 at the same time;

[0046] B) M salt and solvent are mixed to obtain a metal salt quenching solution; then the original lithium-rich manganese-based positive electrode material is poured into the metal salt quenching solution for quenching treatment to obtain a black mixed solution;

[0047] C) centrifugation, washing and drying after the reaction of the black mixed solution are obtained to obtain a lithium-rich manganese-based positive electrode material that is coated with an oxygen-vacancy-rich fast ion cond...

Embodiment 1

[0059] The present embodiment provides a composite modified core-shell structure lithium-rich manganese-based positive electrode material and a preparation method thereof, as follows:

[0060] A), weigh 2g transition metal oxide precursor Ni 1 / 6 Co 1 / 6 Mn 4 / 6 CO 3 and 0.89g Li 2 CO 3 Add it to a planetary ball mill with a rotational speed of 500 rpm and mix it for 5 hours; put the ball-milled mixture into a crucible, put it in a muffle furnace, and then heat it up to 550 °C at a heating rate of 5 °C / min for pre-sintering and hold for 5 hours. Then, the temperature was raised to 830 °C at the same heating rate and kept for 12 h to obtain the original lithium-rich manganese-based cathode material 0.5Li 2 MnO 3 ·0.5LiNi 1 / 3 Co 1 / 3 Mn 1 / 3 O 2 ;

[0061] B), weigh 5.6269g Al (NO 3 ) 3 ·9H 2O was dissolved in 30 mL of dimethyl sulfoxide, and magnetically stirred for 1 h to obtain 0.5 mol / L normal temperature aluminum-based metal salt quenching liquid; Take out and qui...

Embodiment 2

[0065] The present embodiment provides a composite modified core-shell structure lithium-rich manganese-based positive electrode material and a preparation method thereof, as follows:

[0066] A), weigh 2g transition metal oxide precursor Ni 1 / 6 Co 1 / 6 Mn 4 / 6 CO 3 and 0.89g Li 2 CO 3 Add it to a planetary ball mill with a rotational speed of 500 rpm and mix it for 5 hours; put the ball-milled mixture into a crucible, put it in a muffle furnace, and then heat it up to 550 °C at a heating rate of 5 °C / min for pre-sintering and hold for 5 hours. Then, the temperature was raised to 830 °C at the same heating rate and kept for 12 h to obtain the original lithium-rich manganese-based cathode material 0.5Li 2 MnO 3 ·0.5LiNi 1 / 3 Co 1 / 3 Mn 1 / 3 O 2 ;

[0067] B), weigh 6.061g Fe(NO 3 ) 3 ·9H 2 O was dissolved in 30 mL of dimethyl sulfoxide, and magnetically stirred for 1 h to obtain 0.5 mol / L iron-based metal salt quenching solution at room temperature; the original lithiu...

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
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention provides a composite modified lithium-rich manganese-based positive electrode material which has a core-shell structure, an inner core base material xLi2MnO3. (1-x) LiTMO2. My is a metal M ion doped lithium-rich manganese-based positive electrode material, and a shell coating layer is an oxygen vacancy-rich fast ion conductor LiaMOb. The invention further provides a preparation method of the composite modified lithium-rich manganese-based positive electrode material, the lithium-rich manganese-based positive electrode material is modified by adopting a quenching and annealing combined means, and metal ion doping and oxygen vacancy-rich fast ion conductor surface coating effects are achieved; the modified lithium-rich manganese-based positive electrode material has the characteristics of better cycling stability, higher specific discharge capacity, better rate capability and the like. The invention also provides an application of the composite modified lithium-rich manganese-based positive electrode material in a lithium ion battery.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to a composite modified lithium-rich manganese-based positive electrode material and a preparation method and application thereof. Background technique [0002] Lithium-ion batteries have been widely used in electric vehicles, electronic products, distributed energy storage, and military aerospace due to their high specific energy, long life, and low pollution effects. As one of the four core materials of lithium-ion power batteries, cathode materials play a crucial role in the energy density of power batteries. The performance optimization of first-generation power batteries often relies on technological breakthroughs in cathode materials. However, with the increasing demand for electric vehicle cruising range and battery energy density, cathode materials that have been successfully industrialized and commercialized include lithium manganate (LiMn). 2 O 4 ), lithium...

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): H01M4/36H01M4/48H01M4/505H01M10/0525
CPCH01M4/362H01M4/505H01M4/48H01M10/0525Y02E60/10
Inventor 曾令才梁灏严邱报刘兆平
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com