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

Preparation method of nickel-cobalt-manganese ternary positive material precursor of lithium-ion battery

A technology for lithium-ion batteries and cathode materials, applied in battery electrodes, electrical components, secondary batteries, etc., can solve problems such as low crystallinity and incomplete co-precipitation, and achieve excellent electrochemical performance

Inactive Publication Date: 2018-02-27
HARBIN INST OF TECH AT WEIHAI
View PDF4 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional co-precipitation precursor preparation method is to react the three metal ions of nickel, cobalt and manganese in the same reactor at the same time to directly form the ternary precursor co-precipitation particles (Ni, Co, Mn) (OH) 2 or (Ni,Co,Mn)CO 3 , this method has problems such as low crystallinity and incomplete co-precipitation

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
  • Preparation method of nickel-cobalt-manganese ternary positive material precursor of lithium-ion battery
  • Preparation method of nickel-cobalt-manganese ternary positive material precursor of lithium-ion battery
  • Preparation method of nickel-cobalt-manganese ternary positive material precursor of lithium-ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] What this example prepares is positive electrode material Li 1.2 Ni 0.133 co 0.133 mn 0.533 o 2 precursors.

[0027] In this example, the material ratio of Ni:Co:Mn is x:y:z=1:1:4.

[0028] Weigh 0.04mol Ni(CH 3 COO) 2 4H 2 O was dissolved in deionized water to prepare a 100mL solution, and stirred for 20min to obtain a nickel ion concentration of 0.4mol L -1 Nickel salt solution; Weigh 0.04mol Co(CH 3 COO) 2 4H 2 O was dissolved in deionized water to prepare a 100mL solution, and stirred for 20min to obtain a cobalt ion concentration of 0.4mol L -1 cobalt salt solution; weigh 0.16mol Mn(CH 3 COO) 2 4H 2O was dissolved in deionized water to prepare a 400mL solution, and stirred for 20min to obtain a manganese ion concentration of 0.4mol L -1 Manganese salt solution; Weigh 0.45mol Na 2 CO 3 and 19.2g ammonia water (including NH 3 25%~28%) mixed and dissolved in deionized water to prepare a 500mL solution, stirred for 20min to obtain an alkaline solutio...

Embodiment 2

[0044] What is prepared in this example is the positive electrode material LiNi 0.5 co 0.2 mn 0.3 o 2 precursors.

[0045] In this example, the material ratio of Ni:Co:Mn is x:y:z=5:2:3.

[0046] Weigh 0.1mol NiSO 4 ·6H 2 O was dissolved in deionized water to prepare a 100mL solution, and stirred for 20min to obtain a nickel ion concentration of 1mol L -1 Nickel salt solution; Weigh 0.04mol CoSO 4 ·7H 2 O was dissolved in deionized water to prepare a 40mL solution, and stirred for 20min to obtain a cobalt ion concentration of 1mol L -1 cobalt salt solution; weigh 0.06mol MnSO 4 ·H 2 O was dissolved in deionized water to prepare a 60mL solution, and stirred for 20min to obtain a manganese ion concentration of 1mol L -1 manganese salt solution; Weigh 0.6mol NaOH and 15mL ammonia water (containing NH 3 25%~28%) mixed and dissolved in deionized water to prepare a 200mL solution, stirred for 20min to obtain an alkaline solution, in which NaOH and NH 3 The molar ratio ...

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

No PUM Login to View More

Abstract

The invention belongs to the technical field of lithium-ion battery materials and particularly relates to a preparation method of a nickel-cobalt-manganese ternary positive material precursor of a lithium-ion battery. The preparation method comprises the following steps that: three metal ions of nickel, cobalt and manganese are respectively precipitated in different reaction kettles, but the reaction time is very short, the precipitation particles cannot become large, then microprecipitation particles such as Ni(OH)2, Co(OH)2, Mn(OH)2 or NiCO3, CoCO3 and MnCO3 are formed, and then the microprecipitation particles are mixed together and fully react to form the ternary precursor particles. The preparation method has the advantages that the growth environments of primary precipitated particles and secondary precipitated particles are respectively controlled, so that the crystallization process of precursor particles is more optimized; by comparison with the traditional coprecipitation method, the degree of crystallization of the precursor is obviously higher than that of the traditional coprecipitation method, so that the material synthesized by the precursor has a more excellent electrochemical property than the material synthesized by the traditional coprecipitation method.

Description

technical field [0001] The invention belongs to the technical field of lithium ion battery material preparation, and in particular relates to a preparation method of a lithium ion battery ternary cathode material precursor. Background technique [0002] Lithium-ion batteries are characterized by high voltage, high specific capacity, high specific energy, no pollution, long cycle life, small self-discharge and good safety performance. With broad application prospects, lithium-ion batteries have become the most important research object in high-energy power sources. [0003] Nickel-cobalt-manganese ternary cathode materials for lithium-ion batteries have the advantages of low cost, high specific capacity, and good cycle performance, and are promising cathode materials. The ternary Ni, Co, Mn materials mainly include LiNi 1 / 3 co 1 / 3 mn 1 / 3 o 2 (referred to as 111 ternary), LiNi 0.4 co 0.2 mn 0.4 o 2 (424 ternary), LiNi 0.5 co 0.2 mn 0.3 o 2 (523 ternary), LiNi 0.6...

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): H01M4/505H01M4/525H01M4/485H01M10/0525
CPCH01M4/485H01M4/505H01M4/525H01M10/0525Y02E60/10
Inventor 高鹏王桢温广武朱永明
Owner HARBIN INST OF TECH AT WEIHAI
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