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

Lithium-lanthanum oxide coated lithium ion battery ternary positive material and preparation method thereof

A technology for ion batteries and positive electrode materials, applied in battery electrodes, electrical components, secondary batteries, etc., can solve the problems of large irreversible capacity loss of positive electrode materials, poor material rate performance, loss of positive electrode materials, etc., to achieve good electrical cycle performance, The effect of improving the specific capacity of discharge and reducing the degree of mixed discharge

Inactive Publication Date: 2019-11-26
杭州语茵科技有限公司
View PDF5 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a lithium-lanthanum oxide-coated lithium-ion battery ternary positive electrode material and its preparation method, which solves the problem that the positive-electrode material of the lithium-ion battery reacts with the electrolyte and causes loss of the positive-electrode material At the same time, it solves the problem that the positive electrode material has poor rate performance and fast capacity decay under the high voltage of the charge and discharge process, resulting in a large loss of irreversible capacity of the positive electrode material.

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

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0024]In order to achieve the above object, the present invention provides the following technical scheme: a lithium lanthanum oxide-coated lithium ion battery ternary positive electrode material and its preparation method, comprising the following formula raw materials in parts by weight: 10-15 parts of chlorine tetrahydrate Manganese chloride, 7-10 parts of cobalt nitrate hexahydrate, 5-8 parts of nickel dichloride hexahydrate, 40-58 parts of ammonia water, 17-20 parts of anhydrous lithium nitrate, 1-3 parts of anhydrous lithium carbonate, 2- 4 parts of lanthanum chloride hexahydrate, the preparation method includes and the following experimental drugs: distilled water, dilute hydrochloric acid, sodium hydroxide tablets, citric acid, ethylene glycol, ethanol, manganese chloride tetrahydrate as MnCl 2 4H 2 O, where MnCl 2 The mass fraction is 59.5-61.2%, cobalt nitrate hexahydrate is Co(NO 3 ) 2 ·6H 2 O, its Co(NO 3 ) 2 The mass fraction is 61.2-63.5%, nickel dichloride...

Embodiment 1

[0029] (1) Preparation of Mn 0.35-55 co 0.30-0.45 Ni 0.15-0.25 (OH) 2 , into the 2000mL three-necked bottle N 2 Inert gas removes the air, successively weighs 10 parts of manganese chloride tetrahydrate, 7 parts of cobalt nitrate hexahydrate and 5 parts of nickel dichloride hexahydrate and adds them to the three-necked bottle, and the three-necked bottle is placed in a constant temperature water bath and heated to 70°C, stirring at a constant speed and under N 2 React in the atmosphere for 6 hours, then add 58 parts of ammonia water to the three-necked bottle, and then add sodium hydroxide to adjust the pH of the solution to 11, adjust the temperature of the water bath to 55°C, and 2 After the reaction was completed, the solution in the three-necked bottle was filtered to remove the liquid to obtain a brown solid mixture, which was first washed with 300 mL of dilute hydrochloric acid with a substance concentration of 3.5 mol / L to remove unreacted reactants and by-reaction ...

Embodiment 2

[0033] (1) Preparation of Mn 0.35-55 co 0.30-0.45 Ni 0.15-0.25 (OH) 2 , into the 2000mL three-necked bottle N 2 The inert gas removes the air, successively weighs 11 parts of manganese chloride tetrahydrate, 8 parts of cobalt nitrate hexahydrate and 6 parts of nickel dichloride hexahydrate and adds them to the three-necked bottle, and the three-necked bottle is placed in a constant temperature water bath and heated to 65°C, stirring at a constant speed and under N 2 React in the atmosphere for 8 hours, then add 53 parts of ammonia water to the three-necked bottle, then add sodium hydroxide to adjust the pH of the solution to 10, adjust the temperature of the water bath to 55°C, and 2 After the reaction was completed, the solution in the three-necked bottle was filtered to remove the liquid to obtain a brown solid mixture, which was first washed with 400 mL of dilute hydrochloric acid with a substance concentration of 4.1 mol / L to remove unreacted reactants and by-reaction ...

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 invention relates to the technical field of lithium ion battery ternary positive materials, and discloses a lithium-lanthanum oxide coated lithium ion battery ternary positive material and a preparation method thereof. The ternary positive material comprises the following formula raw materials: manganese chloride tetrahydrate, cobalt nitrate hexahydrate, nickel dichloride hexahydrate, ammoniawater, anhydrous lithium nitrate, anhydrous lithium carbonate and lanthanum chloride hexahydrate. According to the lithium-lanthanum oxide coated lithium ion battery ternary positive material and thepreparation method thereof, in LiMn0.35-55Co0.30-0.45Ni0.15-0.25O2 oxides, the LiCo oxide has good electrical cycling performance, the LiNi oxide has very high specific capacity, the LiMn oxide has high chemical stability, and the ternary oxide is small in NiLi mixing degree and high in electrochemical stability, so that the conductivity of the positive material is improved generally, and the charge-discharge cycle performance of a battery is improved; and a chemically inert lithium-lanthanum oxide coating layer suppresses an interface reaction between the positive material and electrolyte, avoids the loss of an LiMn0.35-55Co0.30-0.45Ni0.15-0.25O2 structure, and enhances the electrochemical stability of the positive material.

Description

technical field [0001] The invention relates to the technical field of ternary cathode materials for lithium-ion batteries, in particular to a lithium-lanthanum oxide-coated ternary cathode material for lithium-ion batteries and a preparation method thereof. Background technique [0002] The main constituent materials of lithium-ion batteries include electrolyte, isolation materials, positive and negative electrode materials, etc., and the positive electrode material occupies a large proportion, because the performance of the positive electrode material directly affects the performance of the lithium-ion battery, and its cost also directly determines the cost of the battery. At present, the positive electrode materials that have been successfully developed and applied mainly include lithium cobalt oxide, lithium iron phosphate, lithium manganate, ternary materials nickel-cobalt lithium manganese oxide and nickel-cobalt lithium aluminate, among which the ternary material is ve...

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
IPC IPC(8): H01M4/36H01M4/485H01M4/505H01M4/525H01M4/62H01M10/0525
CPCH01M4/366H01M4/485H01M4/505H01M4/525H01M4/628H01M10/0525Y02E60/10
Inventor 王国琴
Owner 杭州语茵科技有限公司
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