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

Method for eliminating residual lithium and preparing lithium ion conductor-coated high-nickel ternary positive electrode material

A cathode material and lithium ion technology, which is applied in the field of preparing lithium ion conductor coated high-nickel ternary cathode materials, can solve the problem of limiting the practical application of high-nickel ternary cathode materials, affecting the processing performance of pole pieces, and deteriorating electrochemical performance, etc. problems, to achieve excellent electrochemical performance, improve interface stability, and reduce surface impedance.

Inactive Publication Date: 2018-06-15
FUDAN UNIV
View PDF5 Cites 19 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the residual lithium on the surface of the high-nickel ternary material is relatively high, which affects the processing performance of the pole piece
In addition, the residual lithium on the surface accelerates the decomposition of the electrolyte, reduces the stability of the interface, and leads to poor electrochemical performance.
Under the condition of high temperature and high pressure, the battery is prone to unsafe problems such as flatulence and explosion, which greatly limits the practical application of high-nickel ternary cathode materials

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 eliminating residual lithium and preparing lithium ion conductor-coated high-nickel ternary positive electrode material
  • Method for eliminating residual lithium and preparing lithium ion conductor-coated high-nickel ternary positive electrode material
  • Method for eliminating residual lithium and preparing lithium ion conductor-coated high-nickel ternary positive electrode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A preparation of lithium ion conductor Li 3 VO 4 Coated high-nickel ternary cathode material LiNi 0.6 co 0.2 mn 0.2 o 2 The method comprises the following steps;

[0031] (1) Weigh 5 g LiNi respectively 0.6 co 0.2 mn 0.2 o 2 and 1.21gNH 4 VO 3 Add it into a planetary ball mill, and ball mill it at 100-400rmp for 3-6 hours to obtain a uniform mixture;

[0032] (2) Calcining the mixed material obtained in step (1) in a muffle furnace at a temperature of 300-500°C for 4-6 hours to obtain the lithium ion conductor Li 3 VO 4 Coated high-nickel ternary cathode material LiNi 0.6 co 0.2 mn 0.2 o 2 , where Li 3 VO 4 and LiNi 0.6 co 0.2 mn 0.2 o 2 The molar ratio is 1:0.2.

Embodiment 2

[0034] Same as Example 1, the difference is:

[0035] Li 3 VO 4 and LiNi 0.6 co 0.2 mn 0.2 o 2 The molar ratio is 1:0.4.

Embodiment 3

[0037] Same as Example 1, the difference is:

[0038] Li 3 VO 4 and LiNi 0.6 co 0.2 mn 0.2 o 2 The molar ratio is 1:0.8.

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 a lithium ion battery material, specifically a method for eliminating residual lithium and preparing a lithium ion conductor-coated high-nickel ternarypositive electrode material. According to the method, a high-nickel ternary positive electrode material and a lithium ion conductor precursor are subjected to ball milling in a ball mill based on a certain proportion; and the mixture obtained by above-mentioned processing is calcined in the air to obtain a lithium ion battery high-nickel ternary positive electrode modified material. The method issimple in process, convenient to operate, and capable of avoiding adverse influence from water content introduction to the high-nickel ternary material by adopting the dry ball milling mode; and meanwhile, a lithium ion conductor coating layer is formed by adopting surface residual lithium in-situ processing, so that the diffusion rate of lithium ions is accelerated, interface stability is improved, and excellent electrochemical performance is achieved.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion battery materials, and in particular relates to a method for preparing a high-nickel ternary cathode material coated with a lithium-ion conductor. Background technique [0002] In today's world where resources are increasingly depleted, it is particularly important to develop green and clean energy. Lithium-ion batteries have attracted the attention of scientific research and commercial development due to their outstanding advantages such as high energy density, high working voltage, good cycle performance, small self-discharge, small size, and no memory effect. Its application field has rapidly expanded from the initial mobile communication to various aspects of entertainment, military, aerospace, medical treatment, etc., including various portable electronic products, and is developing into large and medium-sized energy storage equipment and power supply. This is of great significance to re...

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): H01M4/505H01M4/525
CPCH01M4/505H01M4/525Y02E60/10
Inventor 余爱水张聪聪苏俊铭刘思杨陈春光刘萌萌陈翔黄桃
Owner FUDAN UNIV
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