Ester organic reagent modified lithium-rich oxide positive electrode material as well as preparation method and application thereof

An organic reagent and modification technology, applied in chemical instruments and methods, inorganic chemistry, nickel compounds, etc., can solve problems such as poor cycle performance, achieve high specific capacity, slow capacity decay, and excellent cycle performance

Active Publication Date: 2020-11-17
GUANGDONG UNIV OF TECH
View PDF6 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the deficiencies and shortcomings of the above-mentioned prior art, the present invention provides a positive electrode material modified by ester organic reagents to modify lithium-rich oxides. The modified lithium-rich oxides modified by ester organic reagents not only overcome the traditional Oxide materials have the disadvantages of fast capacity decay and poor cycle performance. They also have the advantages of high capacity, simple synthesis process, easy control, and good repeatability. They have great commercial prospects.

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
  • Ester organic reagent modified lithium-rich oxide positive electrode material as well as preparation method and application thereof
  • Ester organic reagent modified lithium-rich oxide positive electrode material as well as preparation method and application thereof
  • Ester organic reagent modified lithium-rich oxide positive electrode material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] An embodiment of the modified lithium-rich oxide positive electrode material modified by the ester organic reagent in the present invention, the chemical formula of the modified lithium-rich oxide positive electrode material modified by the ester organic reagent is 0.2Li 2 MnO 3 -0.8LiMn 0.5 Ni 0.5 o 2 The preparation method of the modified lithium-rich oxide positive electrode material modified by the ester organic reagent comprises the following steps:

[0026] (1) Weigh 0.96g transition metal carbonate microsphere precursor (Mn 0.75 Ni 0.25 CO 3 ) into a 100ml reaction kettle, and add 5ml of dimethyl carbonate in an argon atmosphere, after fully stirring, heat treatment in an oven at 150°C for 12h, cool with the furnace, and filter to obtain a powder;

[0027] (2) Add 0.4655g Lithium Carbonate, 1.8701g NaCl and 3.5784g KCl to the powder obtained in step (1), fully grind and then react in a box furnace at 850°C for 12h to complete the heat treatment and cool wit...

Embodiment 2

[0031]An embodiment of the modified lithium-rich oxide positive electrode material modified by the ester organic reagent in the present invention, the chemical formula of the modified lithium-rich oxide positive electrode material modified by the ester organic reagent is 0.2Li 2 MnO 3 -0.8LiMn 0.5 Ni 0.5 o 2 The preparation method of the modified lithium-rich oxide positive electrode material modified by the ester organic reagent comprises the following steps:

[0032] (1) Weigh 0.96g transition metal carbonate microsphere precursor (Mn 0.75 Ni 0.25 CO 3 ) into a 100ml reaction kettle, and add 5ml of ethyl methyl carbonate in an argon atmosphere, after fully stirring, heat-treat in an oven at 100°C for 12h, cool with the furnace, and filter to obtain a powder;

[0033] (2) Add 0.4655g Lithium Carbonate, 1.8701g NaCl and 3.5784g KCl to the powder obtained in step (1), fully grind and then react in a box furnace at 850°C for 12h to complete the heat treatment and cool with...

Embodiment 3

[0036] An embodiment of the modified lithium-rich oxide positive electrode material modified by the ester organic reagent in the present invention, the chemical formula of the modified lithium-rich oxide positive electrode material modified by the ester organic reagent is 0.2Li 2 MnO 3 -0.8LiMn 0.5 Ni 0.5 o 2 The preparation method of the modified lithium-rich oxide positive electrode material modified by the ester organic reagent comprises the following steps:

[0037] (1) Weigh 0.96g transition metal carbonate microsphere precursor (Mn 0.75 Ni 0.25 CO 3 ) into a 100ml reaction kettle, and add 5ml of diethyl carbonate in an argon atmosphere, after fully stirring, heat-treat in an oven at 180°C for 12h, cool with the furnace, and filter to obtain a powder;

[0038] (2) Add 0.4655g Lithium Carbonate, 1.8701g NaCl and 3.5784g KCl to the powder obtained in step (1), fully grind and then react in a box furnace at 850°C for 12h to complete the heat treatment and cool with the...

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 provides an ester organic reagent modified lithium-rich oxide positive electrode material, the chemical formula of the ester organic reagent modified lithium-rich oxide positive electrode material is xLi2MnO3-(1-x) Li1 + yTM1-yO2, TM is at least one of Mn, Ni and Co, x is greater than or equal to 0.01 and less than or equal to 0.5, and y is greater than or equal to 0.01 and less thanor equal to 0.5. The ester organic reagent modified lithium-rich oxide positive electrode material is relatively high in capacity and excellent in cycle performance. When the voltage window is 2-4.8V and the current density is 200 mA / g, the specific capacity can reach 244 mAh / g, and the capacity retention ratio after 400 cycles can reach 85%.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion batteries, and more specifically relates to a lithium-rich oxide cathode material modified by an ester organic reagent and a preparation method and application thereof. Background technique [0002] Due to the advantages of high voltage, large specific energy, long cycle life, small self-discharge, and good safety performance, lithium-ion batteries have been widely used in electronic products, transportation, aerospace, and energy storage devices. At present, high-capacity cathode materials are the key to realizing high-energy-density lithium-ion batteries, and lithium-rich oxides have become the most potential candidate cathode materials for next-generation lithium-ion batteries because of their high specific capacity and high energy density. However, the traditional lithium-rich oxide materials suffer from the disadvantages of low initial Coulombic efficiency and fast capacity and voltage de...

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): H01M4/505H01M4/525H01M10/0525H01M4/62H01M10/42C01G45/12C01G53/00
CPCH01M4/505H01M4/525H01M10/0525H01M4/62H01M10/4235C01G45/1257C01G53/50C01P2004/80C01P2002/72C01P2004/03C01P2006/40Y02E60/10
Inventor 崔佳祥罗冬林展丁晓凯谢惠娴张祖豪谭富林黄文钊
Owner GUANGDONG UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap