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

Lithium secondary battery cathode active material, preparation method therefor, lithium secondary battery cathode comprising same, and lithium secondary battery

A positive electrode active material, lithium secondary battery technology, applied in the direction of secondary batteries, active material electrodes, lithium batteries, etc., can solve the problems of poor thermal performance, expensive, unstable, etc., to improve structural stability and life characteristics , the effect of excellent life characteristics

Active Publication Date: 2019-10-22
LG ENERGY SOLUTION LTD
View PDF9 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because LiCoO 2 Due to the very poor thermal performance due to the unstable crystal structure caused by delithiation and being expensive, when using a large amount of LiCoO 2 Limitations as a power source for applications such as electric vehicles

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
  • Lithium secondary battery cathode active material, preparation method therefor, lithium secondary battery cathode comprising same, and lithium secondary battery
  • Lithium secondary battery cathode active material, preparation method therefor, lithium secondary battery cathode comprising same, and lithium secondary battery
  • Lithium secondary battery cathode active material, preparation method therefor, lithium secondary battery cathode comprising same, and lithium secondary battery

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0052] The method of preparing a positive active material according to the present invention prepares a positive active material represented by and satisfying Equation 1 by mixing and sintering cobalt oxide, a lithium-containing raw material, and a doping raw material.

[0053] [chemical formula 1]

[0054] Li(Co 1-x-y-z m 1 x m 2 y m 3 z )O 2-a h a

[0055] [Formula 1]

[0056] (2x+3y+4z-a) / (x+y+z+a)<2.5

[0057] In Chemical Formula 1,

[0058] m 1 Contains at least one metal element with an oxidation number of 2 selected from the following: Mg, Ca, Fe, Ni, Co, Cu, Zr, Sr, Cd and Ba, M 2 Contains at least one metal element with an oxidation number of 3 selected from the following: Al, Sc, Y, Nb, In, Sb, Ta, Ir and La, M 3 Contains at least one metal element with an oxidation number of 4 selected from the following: Mn, Ti, Sn, Ge, Mo, Tc, Hf, W and Pb, and H is at least one halogen element selected from the following: F - , Cl - 、Br - , I - and At - , 0≤x≤0...

Embodiment approach

[0103] Hereinafter, the present invention will be described in more detail based on examples. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these exemplary embodiments are provided so that this description will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

Embodiment 1

[0106] [Preparation of positive electrode active material]

[0107] After adding 200g of CO 3 o 4 with 6000ppm MgF as doping element 2 and 3000ppm of Al mixed and 97.416g of Li 2 CO 3 After mixing it so that the molar ratio of Li / Co was 1.06, the mixture was heat-treated at 1050° C. for 17 hours in an air atmosphere to prepare LiCo 0.98 Al 0.01 Mg 0.01 o 1.98 f 0.02 Indicates the positive electrode active material.

[0108] [Preparation of positive electrode]

[0109] The positive electrode active material particles prepared above, the PVdF binder and the natural graphite conductive agent were mixed in NMP at a weight ratio of 95:2.5:2.5 to prepare a positive electrode forming composition. A 20 μm-thick Al foil was coated with the composition for forming a positive electrode, dried at 130° C., and then rolled to prepare a positive electrode.

[0110] [Preparation of Lithium Secondary Battery]

[0111] After placing the polyethylene separator between the positive el...

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 sizeaaaaaaaaaa
Login to View More

Abstract

The present invention relates to: a cathode active material in which a lithium cobalt oxide is doped with doping elements comprising a metal element and a halide element, wherein the cathode active material is represented by the following chemical formula 1 and meets the following formula 1; a lithium secondary battery cathode comprising the same; and a lithium secondary battery. [Chemical formula1] Li(Co1-x-y-zM1 xM2 yM3 z)O2-aHa [Formula 1] (2x+3y+4z-a) / (x+y+z+a) < 2.5 In chemical formula 1, M1 is at least one metal element having an oxidation number of 2 and is selected from the group consisting of Mg, Ca, Fe, Ni, Co, Cu, Zr, Sr, Cd and Ba, M2 is at least one metal element having an oxidation number of 3 and is selected from the group consisting of Al, Sc, Y, Nb, In, Sb, Ta, Ir and La,M3 is at least one metal element having an oxidation number of 4 and is selected from the group consisting of Mn, Ti, Sn, Ge, Mo, Tc, Hf, W and Pb, H is at least one halogen element selected from thegroup consisting of F-, Cl-, Br-, I- and At-, 0<=x<=0.1, 0<=y<=0.1, 0<=z<=0.1, 0<=x+y+z<=0.1 and 0<a<=0.3. In formula 1, x is the mole number of the metal element having an oxidation number of 2, y is the mole number of the metal element having an oxidation number of 3, z is the mole number of the metal element having an oxidation number of 4, and a is the mole number of the halide element.

Description

technical field [0001] Cross References to Related Applications [0002] This application claims the benefit of Korean Patent Application No. 2017-0115473 filed with the Korean Intellectual Property Office on September 8, 2017, the disclosure of which is incorporated herein by reference in its entirety. technical field [0003] The present invention relates to a positive electrode active material for a lithium secondary battery, a method for preparing the positive electrode active material, a positive electrode for a lithium secondary battery containing the positive electrode active material, and a lithium secondary battery containing the positive electrode. Background technique [0004] With the development of technology and the increase in demand for mobile devices, the demand for secondary batteries as energy sources has significantly increased. Among these secondary batteries, lithium secondary batteries having high energy density, high voltage, long cycle life, and l...

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): H01M4/525H01M4/485H01M4/131H01M10/052C01G51/00
CPCH01M4/131H01M4/525C01P2004/61C01P2004/54C01P2002/52C01P2004/03C01P2006/40C01G51/42H01M10/0525H01M4/13915H01M4/1393Y02E60/10H01M4/485H01M10/052C01G51/006C01G51/66H01M2004/028
Inventor 许赫柳玟圭赵治皓朴星彬黃进泰郑王谟
Owner LG ENERGY SOLUTION LTD
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