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

Method for modifying lithium nickel manganese oxide positive electrode material for lithium ion battery

A lithium-ion battery, lithium nickel manganate technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve problems such as affecting the modification effect, and achieve the effect of improving the modification effect and excellent cycle performance.

Active Publication Date: 2015-07-08
天津寻木科技有限责任公司
View PDF4 Cites 31 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult to achieve a uniform and complete coating of the material with this type of technology, which affects the modification effect

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
  • Method for modifying lithium nickel manganese oxide positive electrode material for lithium ion battery
  • Method for modifying lithium nickel manganese oxide positive electrode material for lithium ion battery
  • Method for modifying lithium nickel manganese oxide positive electrode material for lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1: Lithium nickel manganese oxide LiNi with the coating amount of alumina 0.5 mn 1.5 o 4 1% of the mass of the material calculates the molar amount of aluminum element, and then converts the molar amount and mass of sodium metaaluminate, and weighs lithium nickel manganate and sodium metaaluminate, and prepares sodium metaaluminate to a concentration of 0.1mol / L solution. Add lithium nickel manganese oxide to water, add 1g lithium nickel manganese oxide per 20mL of water, ultrasonically activate for 15 minutes to obtain a suspension, and then add hexadecyl trimethyl with a mass of 0.5% lithium nickel manganese oxide to the suspension Ammonium bromide, ultrasonically disperse for 15 minutes; then add sodium metaaluminate solution, the addition amount is 5% of the prepared sodium metaaluminate solution, and continue ultrasonication for 15 minutes; while stirring, pass carbon dioxide gas into the mixed solution until the pH of the solution is 8.0, then continue...

Embodiment 2

[0024] Embodiment 2: LiNi lithium nickel manganate with the coating amount of aluminum oxide 0.5 mn 1.5 o 43% of the material mass Calculate the molar amount of aluminum element, and then convert the molar amount and mass of sodium metaaluminate, and weigh lithium nickel manganate and sodium metaaluminate, and prepare sodium metaaluminate to a concentration of 0.3mol / L solution. Add lithium nickel manganese oxide to water, add 1g lithium nickel manganese oxide per 30mL of water, and ultrasonically activate for 15 minutes to obtain a suspension, then add dodecyl trimethyl with a mass of 1% of the mass of lithium nickel manganese oxide to the suspension Ammonium bromide, ultrasonically disperse for 15 minutes; then add sodium metaaluminate solution, the addition amount is 10% of the prepared sodium metaaluminate solution, and continue ultrasonication for 15 minutes; while stirring, pass carbon dioxide gas into the mixed solution until the pH of the solution is 9.0, then cont...

Embodiment 3

[0025] Embodiment 3: Lithium nickel manganese oxide LiNi with the coating amount of aluminum oxide 0.5 mn 1.5 o 4 5% of the mass of the material calculates the molar amount of aluminum element, and then converts the molar amount and mass of sodium metaaluminate, and weighs lithium nickel manganate and sodium metaaluminate, and prepares sodium metaaluminate to a concentration of 0.5mol / L solution. Add lithium nickel manganese oxide to water, add 1g lithium nickel manganese oxide per 40mL of water, ultrasonically activate for 15min to obtain a suspension, and then add hexadecyl trimethyl with a mass of 2% lithium nickel manganese oxide to the suspension Ammonium bromide, ultrasonically disperse for 15 minutes; then add sodium metaaluminate solution, the addition amount is 10% of the prepared sodium metaaluminate solution, and continue ultrasonication for 15 minutes; while stirring, pass carbon dioxide gas into the mixed solution until the pH of the solution is 10.0, then con...

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 method for modifying a lithium nickel manganese oxide positive electrode material for a lithium ion battery. The method comprises the following steps: adding lithium nickel manganese oxide into water, and adding a surfactant into the turbid liquid; adding 5-15 percent of the prepared sodium metaaluminate solution, and introducing carbon dioxide gas into the mixed solution while stirring until the pH value of the solution is 8.0-10.0; dripping the residual sodium metaaluminate solution, introducing the carbon dioxide gas, controlling the pH value of the solution to be 8.0-10.0, and carrying out a concurrent flow reaction; stirring, aging, filtering, washing, drying, thereby obtaining an aluminum hydroxide coated lithium nickel manganese oxide material; and performing heat treatment on the material in a muffle furnace for 300-450 DEG C, thereby obtaining the alumina coated and modified lithium nickel manganese oxide positive electrode material. According to the coated and modified lithium nickel manganese oxide positive electrode material disclosed by the invention, the capacity retention ratio is 99.8 percent under the 1C rate after cycling for 100 times, and compared with that of an uncoated material, the capacity retention ratio is improved by about 10 percent.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion battery cathode materials for chemical power sources, and in particular relates to a surface coating modification method for lithium nickel manganese oxide cathode materials. technical background [0002] Spinel lithium nickel manganese oxide (LiNi 0.5 mn 1.5 o 4 ) cathode material is one of the most researched high specific energy cathode materials. Its discharge voltage platform is 4.7V (vs.Li / Li + ), which is about 20% higher than lithium manganate, and the reversible capacity can reach more than 130mAh / g (theoretical capacity is 147mAh / g), which is also about 20% higher than lithium manganate, thus having a higher energy density than lithium manganate. More importantly, all the Mn in the structured lithium nickel manganese oxide is +4, which prevents the Mn 3+ The resulting disproportionation reaction and Jahn-Teller effect, cycle performance and high-rate discharge performance are ex...

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): H01M4/36H01M4/505H01M4/525H01M10/0525
CPCH01M4/366H01M4/505H01M4/525H01M10/0525Y02E60/10
Inventor 王丽郅晓科刘贵娟陈丹梁广川
Owner 天津寻木科技有限责任公司
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