Coating structure applicable to high-voltage charge-discharge and manufacturing method of coating structure

A coating structure and manufacturing method technology, applied to battery electrodes, structural parts, circuits, etc., can solve the problems of energy density decline, fast capacity decay, cycle performance degradation, etc., and achieve high-temperature storage performance improvement, good cycle and safety performance , the effect of high energy density

Active Publication Date: 2013-02-13
DONGGUAN AMPEREX TECH
View PDF6 Cites 33 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the existence of high-valent nickel during the charge and discharge process, the surface structure of the ternary lithium nickel cobalt manganese material is unstable, and it is easily corroded by HF in the electrolyte during the high voltage charge and discharge process, which makes the capacity decay faster, limiting for its use at high voltage
At present, the main method to solve these problems is to coat the surface of the ternary lithium nickel cobalt manganese. The coating can effectively alleviate the dissolution of metal ions; at the same time, it can reduce the corrosion of active substances by HF, thereby effectively improving circulation, high temperature storage and safety. Performance, such as: the invention patent with the publication number CN 102364723 A uses aluminum coating to coat the ternary lithium

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
  • Coating structure applicable to high-voltage charge-discharge and manufacturing method of coating structure
  • Coating structure applicable to high-voltage charge-discharge and manufacturing method of coating structure
  • Coating structure applicable to high-voltage charge-discharge and manufacturing method of coating structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1 ,Such as figure 1 As shown, a coating structure suitable for high-voltage charging and discharging includes a positive electrode material layer 1 of ternary lithium nickel cobalt manganese, and the surface of the positive electrode material layer 1 is coated with TiO 2 The first metal oxide layer 2 and Al 2 o 3 The second metal oxide layer 3, with TiO 2 The first metal oxide layer 2 is coated on the surface of the positive electrode material layer 1, with Al 2 o 3 A second metal oxide layer 3 coated with TiO 2 The outer surface of the first metal oxide layer 2, with TiO 2 The weight of the first metal oxide layer 2 accounted for with TiO 2 The first metal oxide layer 2 and has Al 2 o 3 40% of the total weight of the second metal oxide layer 3 .

[0024] The manufacturing method of the above cladding structure, the steps include:

[0025] (1) First, add the positive electrode material 1 of ternary lithium nickel cobalt manganese into 4.7 g of titan...

Embodiment 2

[0029] Example 2 , the difference from Example 1 is that it is a coating structure suitable for high-voltage charging and discharging, and the surface of the positive electrode material layer 1 is coated with TiO 2 The first metal oxide layer 2 and ZrO 2 The second metal oxide layer 3, with TiO 2 The first metal oxide layer 2 is coated on the surface of the positive electrode material layer 1, with ZrO 2 A second metal oxide layer 3 coated with TiO 2 The outer surface of the first metal oxide layer 2, with TiO 2 The weight of the first metal oxide layer 2 accounted for with TiO 2 The first metal oxide layer 2 and has ZrO 2 45% of the total weight of the second metal oxide layer 3 .

[0030] The manufacturing method of the above cladding structure, the steps include:

[0031] (1) First add the positive electrode material of ternary lithium nickel cobalt manganese to 5.4 g of TiCl 4 and 75 ml of methanol stirring solvent, after stirring for 4h, suction filtration, evapora...

Embodiment 3

[0036] Example 3 , the difference from Example 2 is that it is a coating structure suitable for high-voltage charging and discharging, and the surface of the positive electrode material layer 1 is coated with Al 2 o 3 The first metal oxide layer 2 and ZrO 2 The second metal oxide layer 3, with Al 2 o 3 The first metal oxide layer 2 is coated on the surface of the positive electrode material layer 1, with ZrO 2 The second metal oxide layer 3 is coated with Al 2 o 3 The outer surface of the first metal oxide layer 2, with Al 2 o 3 The weight of the first metal oxide layer 2 accounts for Al 2 o 3 The first metal oxide layer 2 and has ZrO 2 55% of the total weight of the second metal oxide layer 3 .

[0037] The manufacturing method of the above cladding structure, the steps include:

[0038] (1) Firstly, the positive electrode material of ternary lithium nickel cobalt manganese was added to 2.7 g of aluminum nitrate and 300 ml of industrial alcohol stirring solvent, ...

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
The average diameteraaaaaaaaaa
The average diameteraaaaaaaaaa
Particle sizeaaaaaaaaaa
Login to view more

Abstract

The invention relates to the technical field of lithium ion batteries, in particular to a coating structure applicable to high-voltage charge-discharge and a manufacturing method of the coating structure. A first metal oxide layer and a second metal oxide layer coat the surface of a cathode material layer, the first metal oxide layer coats the surface of the cathode material layer, the second metal oxide layer coats the outer surface of the first metal oxide layer, and the weight of the first metal oxide layer occupies 40 to 70 percent of the total weight of the first metal oxide layer and the second metal oxide layer. The coating structure contains active substances, so the first charge-discharge efficiency of a material is improved; by a surface ceramic oxide layer, corrosion of hydrogen fluoride (HF), release of metal ions and extraction of active oxygen are well inhibited; and a lithium ion secondary battery with the structure is applicable to charge-discharge at high voltage of more than 4.30 V, high in energy density, high in cycle performance and high in safety performance, and high-temperature storage performance is greatly improved.

Description

technical field [0001] The invention relates to the technical field of lithium-ion batteries, in particular to a coating structure suitable for high-voltage charging and discharging and a manufacturing method thereof. Background technique [0002] The ternary lithium-nickel-cobalt-manganese (NCM) material has attracted extensive attention from researchers because of its high capacity (up to 250 mAh / g, 91% of the theoretical capacity), good safety, and low price. However, due to the existence of high-valent nickel during the charge and discharge process, the surface structure of the ternary lithium nickel cobalt manganese material is unstable, and it is easily corroded by HF in the electrolyte during the high voltage charge and discharge process, which makes the capacity decay faster, limiting for its use at high voltages. At present, the main method to solve these problems is to coat the surface of ternary lithium nickel cobalt manganese, which can effectively alleviate the...

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): H01M4/48H01M4/62
CPCY02E60/12Y02E60/10
Inventor 阮丁山谭欣欣柳娜陈杰郭佳丽徐磊敏杨凯华斌
Owner DONGGUAN AMPEREX 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