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

Lithium-ion battery graphene composite ternary anode material and preparation method thereof

A graphene composite, lithium-ion battery technology, applied in battery electrodes, electrical components, secondary batteries, etc., can solve problems such as poor rate performance, low conductivity and capacity decay, and achieve improved cycle performance and rate performance. Good rate performance, the effect of reducing the production process

Active Publication Date: 2019-06-11
HEFEI UNIV OF TECH
View PDF11 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But at the same time, it also has disadvantages such as low conductivity, fast capacity decay, and poor rate performance. In order to obtain a more excellent ternary cathode material, nickel-cobalt lithium manganese oxide is doped and coated.

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
  • Lithium-ion battery graphene composite ternary anode material and preparation method thereof
  • Lithium-ion battery graphene composite ternary anode material and preparation method thereof
  • Lithium-ion battery graphene composite ternary anode material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The preparation method of nickel-cobalt-manganese-lithium cathode material for lithium ion battery in this embodiment comprises the following steps:

[0033] (1) Weigh 0.79g of potassium permanganate and dissolve it in 50ml of deionized water, stir for 15 minutes to dissolve completely, then add 2ml of 37% hydrochloric acid dropwise to it, continue stirring for 15 minutes, then transfer to the reaction kettle, React at 140°C for 12 hours, centrifuge, wash, and dry at 70°C for 12 hours, transfer the resulting product to a crucible, and calcinate in a muffle furnace at 350°C for 6 hours to obtain the desired MnO 2 ;

[0034] (2) Weigh 0.5481g of lithium nitrate, 0.2174g of manganese dioxide, 0.7276g of cobalt nitrate nonahydrate, and 0.7270g of nickel nitrate nonahydrate and dissolve them in a mixed solution of 50ml of water and 50ml of ethanol, in order to compensate for the loss of lithium source during the calcination process , 6% excess lithium nitrate; ultrasonic fo...

Embodiment 2

[0037] In this embodiment, the preparation method of aluminum-doped nickel-cobalt-manganese-manganese-lithium positive electrode material for lithium ion battery comprises the following steps:

[0038] (1) Weigh 0.79g of potassium permanganate and dissolve it in 50ml of deionized water, stir for 15 minutes to dissolve completely, then add 2ml of 37% hydrochloric acid dropwise to it, continue stirring for 15 minutes, then transfer to the reaction kettle, React at 140°C for 12 hours, centrifuge, wash, and dry at 70°C for 12 hours, transfer the resulting product to a crucible, and calcinate in a muffle furnace at 350°C for 6 hours to obtain the desired MnO 2 ;

[0039] (2) Weigh 0.5481g lithium nitrate, 0.2174g manganese dioxide, 0.6620g cobalt nitrate nonahydrate, 0.7270g nickel nitrate nonahydrate, 0.0844g aluminum nitrate nonahydrate and dissolve them in a mixed solution of 50ml water and 50ml ethanol. Lithium source loss during calcination, lithium nitrate excess 6%; ultraso...

Embodiment 3

[0043] In this embodiment, the preparation method of aluminum-doped nickel-cobalt-manganese-manganese-lithium positive electrode material for lithium ion battery comprises the following steps:

[0044] (1) Weigh 0.79g of potassium permanganate and dissolve it in 50ml of deionized water, stir for 15 minutes to dissolve completely, then add 2ml of 37% hydrochloric acid dropwise to it, continue stirring for 15 minutes, then transfer to the reaction kettle, React at 140°C for 12 hours, centrifuge, wash, and dry at 70°C for 12 hours, transfer the resulting product to a crucible, and calcinate in a muffle furnace at 350°C for 6 hours to obtain the desired MnO 2 ;

[0045] (2) Weigh 0.5481g of lithium nitrate, 0.2174g of manganese dioxide, 0.6183g of cobalt nitrate nonahydrate, 0.7270g of nickel nitrate nonahydrate, and 0.1406g of aluminum nitrate nonahydrate and dissolve them in a mixed solution of 50ml of water and 50ml of ethanol. Lithium source loss during calcination, lithium n...

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 discloses a lithium-ion battery graphene composite ternary anode material and a preparation method thereof. According to the anode material, first, a template method is used to synthesize an aluminum-doped nickel-cobalt-manganese-lithium oxide anode material; second, the aluminum-doped nickel-cobalt-manganese-lithium oxide anode material and graphene are added into deionized water and stirred uniformly, a hydrothermal reaction is performed, and the aluminum-doped nickel-cobalt-manganese-lithium oxide anode material / graphene composite anode material is obtained through centrifugation after cooling, washing and drying. According to the method, the advantages of the two materials can be integrated through compositing, so that electron conductivity and ion conductivity are improved, output power density of a battery is increased, the structural stability of the ternary material can be improved, and therefore the composite anode material with good circulation performance, highcapacity and large energy density is obtained.

Description

technical field [0001] The invention belongs to the technical field of battery materials, and in particular relates to a graphene composite ternary cathode material for a lithium ion battery and a preparation method thereof. Background technique [0002] Lithium-ion batteries are a new generation of secondary batteries developed on the basis of lithium primary batteries, and are widely used in small portable electronic communication products and electric vehicles. At present, the anode materials of lithium-ion batteries that have been industrialized mainly include lithium cobalt oxide, modified lithium manganate, lithium iron phosphate, and ternary materials. Although lithium cobaltate has stable performance, its cost is high and the cobalt element is poisonous, which may cause environmental pollution. Although spinel-type lithium manganese oxide is cheap, it has poor cycle performance due to the Jahn-Teller effect, and its electrochemical performance decays quickly due to ...

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
CPCY02E60/10
Inventor 朱继平郭鑫赵闪光严家伟杜向博文刘俐普丽咏
Owner HEFEI UNIV OF TECH
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