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

Positive electrode active material for nonaqueous electrolyte secondary battery, method for producing same, and nonaqueous electrolyte secondary battery using same

A positive electrode active material and non-aqueous electrolyte technology, which is applied in the field of non-aqueous electrolyte secondary batteries, can solve the problems of electrode density decrease, damage performance, battery performance decrease, etc., and achieve the effect of less deterioration and stable charge and discharge

Active Publication Date: 2022-03-04
BASF TODA BATTERY MATERIALS LLC
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such cracks lead to a reduction in conductive pathways, a decrease in electrode density, and a sharp drop in battery performance.
Therefore, in order to further improve the performance, it is necessary to solve the problem that its performance is gradually impaired due to the peeling of such crystalline interfaces, etc.

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
  • Positive electrode active material for nonaqueous electrolyte secondary battery, method for producing same, and nonaqueous electrolyte secondary battery using same
  • Positive electrode active material for nonaqueous electrolyte secondary battery, method for producing same, and nonaqueous electrolyte secondary battery using same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0079] An aqueous sodium hydroxide solution having a pH of 12.0 was prepared in a reactor equipped with a blade stirrer. Aqueous ammonia solution was dropped thereinto so that the ammonia concentration became 0.80 mol / l. A mixed aqueous solution of nickel sulfate, cobalt sulfate, and manganese sulfate was continuously supplied to the reactor at a composition ratio of Ni / Co / Mn=0.8 / 0.1 / 0.1. During this period, the aqueous sodium hydroxide solution and the aqueous ammonia solution were continuously supplied so that the pH value of the reaction solution reached 12 and the ammonia concentration reached 0.8 mol / l, and the reaction was continued until the target average secondary particle size was reached. During this period, spherical composite transition metal precipitates were obtained by applying mechanical shear force to the suspension.

[0080] After the reaction, the taken-out suspension was washed with water by a filter press, and then dried at 150° C. for 12 hours to obtain...

Embodiment 2

[0087] Change the mixing ratio of each compound so that the composition ratio of the precursor reaches Ni / Co / Mn=1.0 / 1.0 / 1.0, and adjust the ratio of Li to the metal constituting the precursor to the ratio shown in Table 1. Li raw material, Precursor, ZrO 2 , and La 2 o 3 The mixture was calcined at 850° C. for 10 hours in an oxidizing atmosphere, and then heat-treated at 630° C. for 8 hours in an air atmosphere as an annealing treatment. The calcined product after the annealing treatment was crushed to obtain positive electrode active material powder. Except for this, a positive electrode active material was obtained in the same manner as in Example 1.

[0088] The variation coefficient of Li / M including crystals and grain boundaries was 26.7% after elemental distribution analysis using NanoSIMS in the cross section of the grains. In addition, it was confirmed that Zr coexists at grain boundaries where the Li concentration is high.

[0089] As an auxiliary measurement, hi...

Embodiment 3

[0092] An aqueous sodium hydroxide solution having a pH of 12.0 was prepared in a reactor equipped with a blade stirrer. Aqueous ammonia solution was dropped thereinto so that the ammonia concentration became 0.80 mol / l. A mixed aqueous solution of nickel sulfate, cobalt sulfate, and sodium aluminate was continuously supplied to the reactor. During this period, the aqueous sodium hydroxide solution and the aqueous ammonia solution were continuously supplied so that the pH value of the reaction solution reached 12 and the ammonia concentration reached 0.8 mol / l, and the reaction was continued until the target average secondary particle size was reached. During this period, spherical composite transition metal precipitates were obtained by applying mechanical shear force to the suspension.

[0093] After the reaction, the taken-out suspension was washed with water by a filter press, and then dried at 150° C. for 12 hours to obtain nickel-cobalt-aluminum compound particles (nick...

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
sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention provides a positive electrode active material. The positive active material comprises the general formula Li a (Ni b co c Al d Me e )O 2 Lithium-transition metal layered oxide represented by Me=Mn, Mg, Ti, Ru, Zr, Nb, Mo, W, 1.00≤a≤1.15, 0.25

Description

technical field [0001] The present invention relates to a positive electrode active material for a non-aqueous electrolyte secondary battery, a method for producing the same, and a non-aqueous electrolyte secondary battery using the same, and in particular to a positive electrode active material capable of performing stable charge and discharge with little degradation for repeated charge and discharge A substance, a method for producing the same, and a nonaqueous electrolyte secondary battery using the same. Background technique [0002] In recent years, the portability and wirelessization of electronic equipment such as AV equipment and personal computers have rapidly progressed. As a driving power source for these equipment, there is an increasing demand for small, lightweight, and high-energy-density secondary batteries. In addition, in recent years, electric vehicles and hybrid vehicles have been developed and put into practical use in order to protect the global environ...

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 Patents(China)
IPC IPC(8): H01M4/525C01G53/00H01M4/505
CPCC01G53/00H01M4/505H01M4/525Y02E60/10C01G53/50C01P2002/60C01P2004/61C01P2006/40H01M4/131H01M4/1391C01G53/44H01M4/485H01M10/052C01G53/42C01G53/66C01P2004/50H01M10/0525H01M2004/028
Inventor 梶山亮尚古贺一路脇山刚正木竜太山村贵幸松本和顺
Owner BASF TODA BATTERY MATERIALS LLC
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