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

Composite cathode active material, cathode and lithium battery each including the same, and method of preparing composite cathode active material

A technology of active material and composite cathode, applied in battery electrodes, lithium storage batteries, active material electrodes, etc., can solve the problems of inability to provide thermal stability, deterioration of life characteristics, etc.

Pending Publication Date: 2020-05-05
SAMSUNG ELECTRONICS CO LTD +1
View PDF12 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Existing nickel-based cathode active materials exhibit deteriorated lifetime characteristics due to a large amount of lithium remaining on the surface of the active material and side reactions caused by cation mixing and fail to provide satisfactory thermal stability.

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 cathode active material, cathode and lithium battery each including the same, and method of preparing composite cathode active material
  • Composite cathode active material, cathode and lithium battery each including the same, and method of preparing composite cathode active material
  • Composite cathode active material, cathode and lithium battery each including the same, and method of preparing composite cathode active material

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0168] In the preparation of the composite positive electrode active material, the preparation of the lithium nickel transition metal oxide having a layered crystal structure comprises: mixing a precursor of the lithium nickel transition metal oxide with a metal precursor to prepare a mixture; and in an oxidative atmosphere The mixture is heat-treated at a temperature of 400° C. to 1000° C. to prepare a lithium nickel transition metal oxide.

[0169] The preparation of the mixture is carried out, for example, by a dry method without using a solvent. The mixture is, for example, a dry powder mixture of lithium nickel transition metal oxide precursor powder and metal precursor powder. In an embodiment, the preparation of the mixture is performed by, for example, a wet method involving a solvent. The mixture includes a solvent capable of dissolving the precursor of the lithium nickel transition metal oxide and the metal precursor, and the type of the solvent is not particularly ...

Embodiment 1

[0177] Embodiment 1: Preparation of composite positive electrode active material

[0178] Zirconia (ZrO 2 ), alumina (Al 2 o 3 ), Ni 0.88 co 0.08 mn 0.04 (OH) 2 (Reshine NewMaterialCo., Ltd., China) and LiOH·H as a lithium precursor 2 O mixed to obtain the first mixture. Stoichiometric adjustment of zirconia (ZrO 2 ), alumina (Al 2 o 3 ), Ni 0.88 co 0.08 mn 0.04 (OH) 2 and LiOH H as a lithium precursor 2 The amount of O to obtain Li 1.09375 (Ni 0.88 co 0.08 mn 0.04 )Al 0.00125 Zr 0.0025 o 2 . Added Ni 0.88 co 0.08 mn 0.04 (OH) 2 The powder includes secondary particles which are aggregates of needle-shaped primary particles.

[0179] The first mixture was put into a furnace and subjected to a first heat treatment at 760° C. for 12 hours while flowing oxygen gas therein.

[0180] Through the first heat treatment process, Li 1.09375 (Ni 0.88 co 0.08 mn 0.04 )Al 0.00125 Zr 0.0025 o 2 , which is a lithium nickel transition metal oxide with a layer...

Embodiment 2

[0187] Embodiment 2: Preparation of composite positive electrode active material

[0188] Composite cathode active material was prepared in the same manner as in Example 1, except that the Co(NO 3 ) 2 ·6H 2 O and Mg(NO 3 ) 2 ·6H 2 The amount of the precursor of O is such that the total amount of Co and Mg in the coating film formed on the secondary particle of the composite positive electrode active material is 0.75 parts by weight, with respect to 100 parts by weight of the lithium nickel transition with layered crystal structure Metal oxide.

[0189] The total amount of Co and Mg in the coating film was 0.75 parts by weight with respect to 100 parts by weight of the lithium nickel transition metal oxide having a layered crystal structure.

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
particle diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention relates to a composite cathode active material, a cathode and a lithium battery each including the same, and a method of preparing the composite cathode active material. The composite cathode active material includes a secondary particle; and a coating on a surface of the secondary particle, wherein the secondary particle comprises a plurality of primary particles, and the pluralityof primary particles include a lithium nickel transition metal oxide having a layered crystal structure; and a grain boundary between primary particles of the plurality of primary particles, the grainboundary including a lithium metal oxide having a crystal structure different from the lithium nickel transition metal oxide having a layered crystal structure, wherein the coating on the surface ofthe secondary particle includes a metal oxide including cobalt, and a Group 2 element, a Group 12 element, a Group 13 element, or a combination thereof

Description

[0001] Cross References to Related Applications [0002] This application claims priority and benefit to, and all rights arising from, Korean Patent Application No. 10-2018-0128324 filed with the Korean Intellectual Property Office on October 25, 2018, the entire contents of which are incorporated herein by reference. technical field [0003] The present disclosure relates to a composite cathode active material, a cathode and a lithium battery each including the same, and a method of preparing the composite cathode active material. Background technique [0004] For improved miniaturization and performance of various devices, high energy density is becoming important in addition to miniaturization and weight reduction of lithium batteries. In order to implement a lithium battery satisfying such importance, a nickel-based positive electrode active material having a high capacity is being studied. [0005] Existing nickel-based positive active materials exhibit deteriorated li...

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): H01M4/36H01M4/525H01M4/505H01M4/485H01M4/58H01M4/62H01M10/0525
CPCH01M4/366H01M4/525H01M4/505H01M4/485H01M4/5825H01M4/62H01M10/0525H01M2004/028H01M4/1391H01M4/0471H01M4/364H01M4/131H01M4/136H01M4/5805Y02E60/10H01M10/052C01G53/44C01F7/162C01G25/00C01P2004/82C01P2004/60H01M4/139
Inventor 洪锡基申东旭俞炳龙朴晋焕宋在爀延东熙崔棅珍河镇秀咸东诊
Owner SAMSUNG ELECTRONICS CO LTD
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