Method for manufacturing positive electrode active material for lithium secondary battery and positive electrode active material for lithium secondary battery manufactured thereby

A positive electrode active material, lithium secondary battery technology, applied in the direction of active material electrodes, battery electrodes, lithium batteries, etc., can solve the problems of low thermal stability, battery rupture, performance degradation of positive electrode materials, etc., to improve conductivity and prevent condensation Gelling, effects that improve input/output characteristics

Pending Publication Date: 2022-08-02
LG ENERGY SOLUTION LTD
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when combined with LiCoO 2 When compared to LiNiO 2 Has lower thermal stability, and there is a problem that when an internal short circuit occurs in a charged state due to external pressure, etc., the positive electrode active material itself decomposes, causing rupture and fire of the battery
However, in the case of carbon coating, the disadvantage is that it should be accompanied by high-

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
  • Method for manufacturing positive electrode active material for lithium secondary battery and positive electrode active material for lithium secondary battery manufactured thereby
  • Method for manufacturing positive electrode active material for lithium secondary battery and positive electrode active material for lithium secondary battery manufactured thereby
  • Method for manufacturing positive electrode active material for lithium secondary battery and positive electrode active material for lithium secondary battery manufactured thereby

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0096] Hereinafter, the present invention will be described in detail with reference to the embodiments. However, the embodiments according to the present invention may be modified into other various forms, and the scope of the present invention should not be construed as being limited to the embodiments described below. The embodiments of the present invention are provided to more fully describe the present invention to those skilled in the art.

Embodiment 1

[0099] will be composed of LiNi 0.6 CO 0.2 Mn 0.2 O 2 The indicated lithium transition metal oxide and carbon black having the hollow structure of the specifications in Table 1 below were introduced into a paint stirrer (1400Al classic stirrer, Red Devil Co., Ltd), and then mixed for 60 minutes so that the carbon black was relative to 500 g. The lithium transition metal oxide was 1 wt %, so that the transition metal oxide and the carbon black of the hollow structure were uniformly dispersed.

[0100] The above mixture was introduced into a mechanofusion apparatus (nobilta, Hosokawa Micron Co., Ltd), and then processed at 3000 rpm for 10 minutes to produce a positive electrode active material in which a carbon coating layer with a thickness of 200 nm was formed on the lithium transition metal oxide.

Embodiment 2

[0102] Except that the mixing was carried out in such a way that the carbon black was 1 wt % with respect to 200 g of the lithium transition metal oxide, in the same manner as in Example 1, a carbon black having a thickness of 250 nm was produced in the same manner as in Example 1. Carbon-coated cathode active material.

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
Specific surface areaaaaaaaaaaa
Sizeaaaaaaaaaa
Specific surface areaaaaaaaaaaa
Login to view more

Abstract

The present invention relates to a method for manufacturing a positive electrode active material, a positive electrode active material manufactured by the method, a positive electrode comprising the positive electrode active material, and a lithium secondary battery. The method comprises the following steps: mixing a lithium transition metal oxide and a carbon-based material with a hollow structure to form a mixture; and mechanically treating the mixture to form a carbon coating layer on the surface of the lithium transition metal oxide, in which the carbon-based material of the hollow structure is chain-shaped and has a specific surface area of 500 m2/g or more, a degree of graphitization (ID/IG) of 1.0 or more, and a DBP oil absorption of 300 mL/100 g or more.

Description

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

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
Owner LG ENERGY SOLUTION 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.

© 2023 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap