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

Electrolyte and lithium ion secondary battery including the same

A secondary battery and electrolyte technology, which is applied in the field of electrolyte for lithium-ion secondary batteries and lithium-ion secondary batteries, and can solve problems such as reducing the effective capacity of graphite negative electrodes and deteriorating battery high-rate cycle life

Inactive Publication Date: 2010-02-03
SAMSUNG SDI CO LTD
View PDF1 Cites 46 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, ionic liquids reduce the effective capacity of graphite anodes, leading to the deterioration of high battery efficiency and / or cycle life.

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
  • Electrolyte and lithium ion secondary battery including the same
  • Electrolyte and lithium ion secondary battery including the same
  • Electrolyte and lithium ion secondary battery including the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0084] The cathode active material LiCoO 2 , a binder polyvinylidene fluoride (PVdF), and a conductive material carbon were mixed in N-methyl-2-pyrrolidone at a weight ratio of 92:4:4 to prepare a slurry for a positive electrode active material. The resulting slurry was coated on an aluminum foil, dried and rolled to prepare a positive electrode plate. 97 wt % of artificial graphite as a negative active material and 3 wt % of polyvinylidene fluoride (PVdF) as a binder were mixed and dispersed in water to prepare a negative active material slurry. The resulting slurry was coated on a copper foil, dried and rolled to prepare a negative electrode plate.

[0085] A separator made of polyethylene (PE) was inserted between the electrodes, wound, pressed and inserted into a prismatic can (46mmx34mmx50mm).

[0086] LiPF 6 Add ethylene carbonate and ethyl methyl carbonate with 3:7 (v / v) in the mixed solvent that mixes, until final concentration reaches 1.3M, and the ionic liquid N-m...

Embodiment 2

[0089] A lithium-ion secondary battery was manufactured in the same manner as in Example 1, except that 1 part by weight of lithium fluorooxalate borate was added.

Embodiment 3

[0091] A lithium ion secondary battery was manufactured in the same manner as in Example 1, except that 40 parts by weight of MPPTFSI (N-methylpropylpyrrolidinium bis(trifluoromethanesulfonyl)imide) was used as the ionic liquid.

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

An electrolyte for a lithium ion secondary battery is provided. The electrolyte includes a non-aqueous organic solvent, a lithium salt, an ionic liquid and an additive. The additive has a lowest unoccupied molecular orbital (LUMO) level of -0.5 to 1.0 eV and a highest occupied molecular orbital (HOMO) level lower than -11.0 eV. Further provided is a lithium ion secondary battery including the electrolyte. The battery is advantageous in terms of overcharge safety and heat stability. In addition, the battery has improved high-efficiency properties and cycle life characteristics.

Description

[0001] Cross References to Related Applications [0002] This application claims priority and benefit from Korean Patent Application No. 10-2008-0074314 filed with the Korean Intellectual Property Office on Jul. 29, 2008, the entire contents of which are hereby incorporated by reference. technical field [0003] The invention relates to an electrolytic solution for a lithium ion secondary battery and a lithium ion secondary battery containing the electrolytic solution. Background technique [0004] Lithium-ion batteries have higher energy density and capacity per unit area than nickel-manganese and nickel-cadmium batteries. Therefore, compared with nickel-manganese and nickel-cadmium batteries, lithium-ion batteries have a lower self-discharge rate and a longer service life. In addition, lithium-ion batteries are convenient to use and have long-life characteristics due to the lack of memory effect. That is, the battery does not have to be fully discharged before recharging...

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): H01M10/40
CPCH01M10/4235Y02E60/122H01M2300/0045H01M10/0525H01M2300/0091H01M10/0569H01M10/0567Y02E60/10H01M10/05
Inventor 崔南顺伊琳娜·普罗法提洛娃许素贤宋义焕金性洙
Owner SAMSUNG SDI CO LTD
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