Organic electrolyte and lithium secondary cell using same

A technology of organic electrolyte and lithium secondary battery, which is applied in the direction of secondary battery, non-aqueous electrolyte storage battery, lithium storage battery, etc., and can solve problems such as the consistent state of the difficult surface film and the inability to obtain cycle efficiency.

Inactive Publication Date: 2003-05-07
SAMSUNG SDI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, these attempts still have difficulty maintaining the surface film in a consistent state during repeated charge-discharge cycles and immersion
Moreover, satisfactory cycle efficiencies cannot be obtained when the above-mentioned various attempts are carried out alone

Method used

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  • Organic electrolyte and lithium secondary cell using same
  • Organic electrolyte and lithium secondary cell using same
  • Organic electrolyte and lithium secondary cell using same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Lithium metal salt, LiPF 6 Store at a certain concentration to form 1.15M LiPF 6 In the plastic box of the electrolyte of the solution, and add the mixed solvent of ethylene carbonate (EC) / dimethyl carbonate (DMC) / ethyl methyl carbonate (EMC) / propylene carbonate (PC) therein and vigorously stir , to dissolve LiPF 6 . 0.2 parts by weight (1 mM) of polyethylene glycol dimethyl ether (PEGDME) with a weight average molecular weight of 2000 and 0.05 parts by weight (500 ppm) of aluminum iodide were added to the obtained product to prepare an organic electrolyte.

Embodiment 2

[0059] Prepare organic electrolytic solution by the method identical with embodiment 1, difference is to use the PEGDME of 0.29 weight part (1.45mM) and the AlI of 0.17 weight part 3 .

Embodiment 3

[0061] Prepare organic electrolytic solution by the method identical with embodiment 1, difference is to use the PEGDME of 1 weight part (5mM) and the AlI of 0.3 weight part 3 .

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Abstract

An organic electrolytic solution and a lithium secondary battery employing the same, wherein the organic electrolytic solution for a lithium secondary battery includes a polymer adsorbent having an ethylene oxide chain capable of being adsorbed into a lithium metal, a material capable of reacting with lithium to form a lithium alloy, a lithium salt, and an organic solvent. The organic electrolytic solution may be applied to all types of batteries including lithium ion batteries, lithium polymer batteries and lithium metal polymer batteries using a lithium metal for a negative electrode material, and the like. In particular, when the organic electrolytic solution is utilized in a lithium metal polymer battery, it serves to stabilize the lithium metal, and to increase the lithium ionic conductivity, thereby improving the cycle characteristics and charging / discharging efficiency of the battery.

Description

technical field [0001] The present invention relates to a lithium secondary battery, and more particularly, the present invention relates to an organic electrolytic solution which is safely adsorbed on the surface of lithium metal to make the current flow during charging and discharging and a lithium secondary battery using the organic electrolytic solution Uniform distribution and increased ionic conductivity of lithium ions lead to improved life characteristics of lithium secondary batteries. Background technique [0002] With the development of increasingly miniaturized and lightweight portable electronic devices such as camcorders, portable communication devices or notebook computers, the demand for small, lightweight, thin and high-performance batteries that provide power for these portable electronic devices The demand is increasing day by day, and research on such batteries is being carried out intensively. [0003] Widely used lithium-ion secondary batteries use car...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/05H01M10/052H01M10/0567H01M10/0568H01M10/0569
CPCH01M4/505H01M4/485H01M10/0566H01M2300/0085H01M10/052H01M10/0565Y02E60/122H01M10/0567Y02E60/10H01M10/0525
Inventor 金柱烨承度泳柳永均
Owner SAMSUNG SDI CO LTD
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