Lithium ion secondary battery with high energy density

A high-energy density, secondary battery technology, applied in secondary batteries, battery electrodes, circuits, etc., can solve the problems of battery swelling, deformation, difficulty in preparation, and acceleration.

Inactive Publication Date: 2012-03-28
DONGGUAN AMPEREX TECH +1
View PDF5 Cites 31 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Of course, the material itself also has certain defects: it has strong water absorption, and it is easy to gel during the preparation of the slurry, which is difficult to prepare; it is particularly noteworthy that: Li in the structure + and Ni 2+ It is easy to mix and discharge, which leads to the release of active oxygen and makes high-valent nickel ions easily dissolve into the electrolyte, catalyzing the decomposition of the electrolyte, so that the high-nickel (Ni≥0.7mol) Ni-Co-Mn/Al ternary material is made Lithium-ion secondary batteries produce a large amount of gas when stored at high temperature, which deteriorates battery performance. Especially for lithium-ion batteries that use aluminum-plastic composite film or iron-plastic composite film as the outer packaging, the out

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
  • Lithium ion secondary battery with high energy density
  • Lithium ion secondary battery with high energy density
  • Lithium ion secondary battery with high energy density

Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0038] In a 5L mixer, add 104g PVDF to 1750g NMP under stirring, add 87.8g conductive agent after dissolving, stir at 40-50°C for 3 hours at high speed, cool to 20-25°C with circulating water, add 3058g positive electrode in Table 1 For active substance A, vacuumize and stir at a high speed for 3 hours at 20-25°C. Coating and cold pressing the prepared cathode slurry.

[0039] The negative electrode is prepared in the water system according to the ratio of graphite: thickener CMC: binder SBR: conductive carbon powder = 96%: 1%: 2%: 1%. Coat and cold-press the prepared negative electrode slurry to obtain a compacted density of 1.50-1.55g / cm 3 within range.

[0040] The above-mentioned positive and negative pole sheets and separator are wound to make aluminum-plastic composite film or iron-plastic composite film lithium-ion battery cell, and then inject non-aqueous electrolyte. The electrolyte formula is: solvent is ethylene carbonate: diethyl carbonate= 1:1 (volume ratio), L...

Embodiment 2

[0042] The difference from Example 1 is that B in Table 1 is used as the positive electrode active material, and the others are consistent with Example 1.

Embodiment 3

[0044] The difference from Example 1 is that the positive electrode active material uses C in Table 1, and the others are consistent with Example 1.

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
Densityaaaaaaaaaa
Login to view more

Abstract

The invention provides a lithium ion secondary battery with high energy density. The lithium ion secondary battery mainly comprises an anode, a cathode and electrolyte. The anode active substance comprises a LiNixCoyM1-x-yO2 material, wherein 0.7<=x<=1.0, 0<=y<=0.3, and M is Co or Mn. Also, the anode active substance is coated with MeaOb on the surface, wherein Me is Al or Ti. The electrolyte comprises lithium salt, a non-aqueous organic solvent, and a nitrile compound additive containing fluoroethylene carbonate (FEC) and chain-shaped saturated hydrocarbon. The operation method of the lithium ion secondary battery comprises steps that: the battery is charged to a charge cutoff voltage of 4.5V or higher, such that the application requirement of the lithium ion battery of high energy density is satisfied.

Description

Technical field: [0001] The invention relates to the technical field of lithium ion batteries, in particular to a lithium ion secondary battery with high energy density. Background technique: [0002] The lithium-ion battery with aluminum-plastic composite film as the outer packaging has the characteristics of high energy density, excellent safety performance, large-capacity monomer and environmental protection; and because of its advantages of thinness, lightness and arbitrary shape, it can be tailored to achieve Miniaturization, light weight, and space maximization, so there is an increasing demand for it as a power source for portable devices such as mobile phones, notebook computers, wireless headsets, Bluetooth devices, MPx, and watches. In addition, this lithium-ion battery is also attracting attention as a power source for Scooter, xEV, etc. [0003] Cathode material is one of the key factors restricting the cost performance of lithium-ion batteries. At present, 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): H01M10/0525H01M10/0567H01M4/36
CPCY02E60/122Y02E60/10
Inventor 谭欣欣赖旭伦柳娜许瑞邓耀明王正庞佩佩
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