Unlock instant, AI-driven research and patent intelligence for your innovation.

High-nickel ternary lithium ion battery non-aqueous electrolyte and battery containing electrolyte

A lithium-ion battery and non-aqueous electrolyte technology, applied in the field of lithium-ion batteries, can solve the problems of increasing battery interface impedance, battery low-temperature performance attenuation, and gas swelling, so as to reduce oxidation decomposition, improve high-low temperature performance, and high impedance Effect

Inactive Publication Date: 2021-01-29
SHANSHAN ADVANCED MATERIALS QUZHOU CO LTD
View PDF10 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current commercialized film-forming additives, such as ethylene carbonate (VC), can improve the cycle performance of the battery. In order to improve the cycle life of the battery, it is often necessary to add a higher content of ethylene carbonate, but too much VC can improve the battery life. The cycle life of the battery will also cause the battery to produce gas and bloat during high-temperature storage, and too much VC will increase the impedance of the battery interface, resulting in attenuation of the low-temperature performance of the battery

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
  • High-nickel ternary lithium ion battery non-aqueous electrolyte and battery containing electrolyte
  • High-nickel ternary lithium ion battery non-aqueous electrolyte and battery containing electrolyte
  • High-nickel ternary lithium ion battery non-aqueous electrolyte and battery containing electrolyte

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The positive electrode preparation steps, the negative electrode preparation steps, the electrolyte preparation steps, the diaphragm preparation steps and the battery preparation steps are described as follows. Among them, the positive active material is LiNi 0.6 co 0.2 mn 0.2 O: The negative electrode active material is artificial graphite, and the coating area density is determined according to the battery size, capacity design and the capacity of the positive and negative electrode materials.

[0038] The preparation steps of the positive electrode are: weighing the active material (LiNi 0.6 co 0.2 mn 0.2 O), and polyvinylidene fluoride (PVDF), conductive carbon black (Super-P) according to mass ratio 97:1:2 join in N-methylpyrrolidone (NMP) solvent and mix, obtain slurry by stirring, coating After being evenly coated on both sides of the aluminum foil on a cloth machine, the positive electrode sheet is obtained after drying, cooling and slitting.

[0039] The ...

Embodiment 2-8

[0044] Embodiment 2-8 and comparative example 1-7

[0045] As shown in Table 1, in Examples 2-8 and Comparative Examples 1-7, except that the composition ratio of the components of the electrolyte solution is added as shown in Table 1, the others are the same as in Example 1.

[0046] Table 1 embodiment 1-8 and the composition ratio of each component of the electrolyte of comparative example 1-7

[0047]

[0048]

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 lithium-ion batteries, and discloses a high-nickel ternary lithium ion battery non-aqueous electrolyte and a battery containing the electrolyte. The high-nickel ternary lithium ion battery non-aqueous electrolyte comprises an electrolyte lithium salt, a non-aqueous organic solvent and a film-forming additive, and the film-forming additive contains aphosphorus-based compound. The phosphorus-based compound in the non-aqueous electrolyte of the high-nickel ternary lithium ion battery can be polymerized on the surface of the positive electrode material to form a conductive passivation film, the stability of the positive electrode material under the conditions of high temperature and high voltage is improved by the film, and the electrolyte is prevented from further oxygenolysis; and the normal-temperature cycle performance, the high-temperature cycle performance and the high-temperature storage performance of the lithium ion battery are further improved.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to a non-aqueous electrolyte solution for a high-nickel ternary lithium ion battery and a battery containing the electrolyte solution. Background technique [0002] Lithium-ion batteries are widely used in digital 3C products such as mobile phones, cameras and notebook computers due to their advantages such as light weight, small size, high energy density, long cycle life, high output power and low environmental pollution. [0003] During the high-temperature charge-discharge cycle and high-temperature storage of lithium-ion batteries, the oxidative decomposition reaction on the surface of the positive electrode material of the electrolyte is aggravated, and the oxidative decomposition products of the electrolyte are continuously deposited on the surface of the positive electrode, resulting in an increase in the impedance of the positive electrode surface, resulting in ...

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): H01M10/0567H01M10/0525
CPCH01M10/0525H01M10/0567H01M2300/0025Y02E60/10
Inventor 钟婷婷朱学全郭力黄慧聪潘立宁
Owner SHANSHAN ADVANCED MATERIALS QUZHOU CO LTD