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

Positive electrode active material, preparation method thereof, positive electrode plate and lithium ion secondary battery

A positive active material, lithium-nickel-cobalt-manganese technology, applied in secondary batteries, active material electrodes, positive electrodes, etc., can solve the problems of high-temperature cycle performance and poor anti-gas production performance, and achieve improved anti-gas production performance, high Specific capacity characteristics and the effect of reducing battery gas production

Active Publication Date: 2021-03-05
CONTEMPORARY AMPEREX TECH CO
View PDF3 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Li-nickel-cobalt-manganese oxide has a high theoretical capacity, and lithium-ion secondary batteries using lithium-nickel-cobalt-manganese oxide as the positive electrode active material can be expected to obtain higher energy density, but this kind of lithium-ion secondary battery is in practical application The high-temperature cycle performance and anti-gas production performance are poor

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, preparation method thereof, positive electrode plate and lithium ion secondary battery
  • Positive electrode active material, preparation method thereof, positive electrode plate and lithium ion secondary battery
  • Positive electrode active material, preparation method thereof, positive electrode plate and lithium ion secondary battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0131] Preparation of cathode active material

[0132] (1) The nickel-cobalt-manganese ternary material precursor [Ni 0.8 co 0.1 mn 0.1 ](OH) 2, lithium hydroxide LiOH and antimony trioxide Sb 2 o 3 Add in a high-speed mixer and mix for 1h to obtain a mixture, wherein the molar ratio Li / Me of the nickel-cobalt-manganese ternary material precursor to lithium hydroxide is 1.05, and Me represents Ni in the nickel-cobalt-manganese ternary material precursor. , the total molar weight of Co, Mn; Sb 2 o 3 The addition amount makes the content of Sb in the positive electrode active material be 3014ppm. Put the mixture into an atmosphere sintering furnace for sintering, the sintering temperature is 830°C, and the sintering atmosphere is O 2 In an oxygen-containing atmosphere with a concentration of 90%, the sintering time is 15 hours, and the matrix particles can be obtained by crushing and sieving, wherein Sb is uniformly doped in the bulk phase structure of the matrix parti...

Embodiment 2～35 and comparative example 1～9

[0145] The difference from Example 1 is that the relevant parameters in the preparation steps of the positive electrode active material are changed to obtain the positive electrode active material with predetermined parameter characteristics, see Table 1-1 to Table 1-2 for details.

[0146] Wherein, the positive electrode active material precursors of Examples 2-31 and Comparative Examples 1-5 are [Ni 0.8 co 0.1 mn 0.1 ](OH) 2 ; The positive electrode active material precursors of Examples 32~35 and Comparative Examples 6~9 are [Ni 0.5 co 0.2 mn 0.3 (OH) 2 . And in Table 1-1 and Table 1-2:

[0147] The M of embodiment 2, embodiment 10 and embodiment 33 2 The element precursor is TiO 2 The M of embodiment 3 and embodiment 11~14 2 The element precursor is NbO 2 ; The M of embodiment 4 2 The element precursor is ZrO 2 ; The M of embodiment 5 2 The element precursor is RuO 2 ; The M of embodiment 6 2 The element precursor is GeO 2 The M of embodiment 7 and embodim...

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
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a positive electrode active material, a preparation method thereof, a positive electrode plate and a lithium ion secondary battery. The positive electrode active material comprises body particles and a coating layer coating the outer surfaces of the body particles; the body particles comprise lithium nickel cobalt manganese oxide, and the coating layer comprises oxide of M1element; M2 elements and M3 elements are doped in the body particles, the M2 elements in the body particles are uniformly distributed, and the M3 elements in the body particles have a reduced concentration gradient from the outer surfaces of the body particles to the core direction; wherein the M1 element and the M3 element are respectively and independently selected from one or more of Mg, Al, Ca, Ba, Ti, Zr, Zn and B, and the M2 element comprises one or more of Si, Ti, Cr, Mo, V, Ge, Se, Zr, Nb, Ru, Rh, Pd, Sb, Te, Ce and W. By adopting the positive electrode active material disclosed by the invention, the lithium ion secondary battery has relatively high energy density, high-temperature cycle performance and high-temperature storage performance.

Description

technical field [0001] The invention belongs to the technical field of secondary batteries, and in particular relates to a positive electrode active material, a preparation method thereof, a positive electrode sheet and a lithium ion secondary battery. Background technique [0002] Lithium-ion secondary battery is a kind of rechargeable battery, which mainly relies on the movement of lithium ions between the positive electrode and the negative electrode to work, and is currently widely used as a clean energy source. As an important part of the lithium ion secondary battery, the positive electrode active material provides lithium ions that reciprocate on the positive and negative electrodes during the charging and discharging process of the battery. Therefore, the positive electrode active material is very important for the performance of the battery. [0003] Li-nickel-cobalt-manganese oxide has a high theoretical capacity, and lithium-ion secondary batteries using lithium-n...

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): H01M4/36H01M4/505H01M4/525H01M4/62H01M4/131H01M10/0525
CPCH01M4/366H01M4/525H01M4/505H01M4/62H01M4/628H01M4/131H01M10/0525H01M2004/021H01M2004/028Y02E60/10H01M4/1391C01G53/50C01P2002/52C01P2004/84C01P2004/61C01G53/44C01P2006/10C01P2006/11C01P2006/12C01P2006/40
Inventor 钭舒适胡春华蒋耀吴奇何金华邓斌
Owner CONTEMPORARY AMPEREX TECH CO
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