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Organic electrolytic solution and lithium battery using the same

A technology of electrolytic solution and lithium battery, which is applied in the field of lithium battery and can solve the problems such as the impracticality of the nitride layer

Inactive Publication Date: 2005-04-27
SAMSUNG SDI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, a lithium nitride layer is not practical

Method used

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  • Organic electrolytic solution and lithium battery using the same
  • Organic electrolytic solution and lithium battery using the same
  • Organic electrolytic solution and lithium battery using the same

Examples

Experimental program
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specific Embodiment 1

[0044] An electrode device comprising a cathode, an anode and a polyethylene separator (Ashai Co., Tokyo, Japan) placed between the cathode and anode. Both the cathode and the anode are lithium metal electrodes. The electrode device was packaged in a battery case, and the organic electrolytic solution according to one embodiment of the present invention was injected to prepare a lithium battery. The organic electrolytic solution contains 1M Li(SO 2 CF 3 ), a mixture of DGM, DME and DOX in a volume ratio of 4:4:2 as an organic solvent, and 0.2 parts by weight of 1-iodobenzene based on 100 parts by weight of the organic solvent.

specific Embodiment 2

[0045] A lithium battery was prepared in the same manner as in Example 1, except 0.2 parts by weight of 1-iodobenzene based on 100 parts by weight of organic solvent, and polyvinylidene fluoride instead of polyethylene as a separator.

specific Embodiment 3 and 4

[0047] Lithium batteries were prepared in the same manner as in Example 1, except that 0.5 parts by weight and 1 part by weight of 1-iodobenzene based on 100 parts by weight of the organic solvent were used for the corresponding lithium batteries.

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Abstract

The present invention is related to an organic electrolytic solution comprising a halogenated benzene compound, such as 1-iodobenzene or 1-chlorobenzene. Specifically, the halogenated benzene compound has a high polarity and is capable of reducing the reactivity of the lithium metal surface. Due to these characteristics of the halogenated benzene compound, the lithium ions are unlikely to bond with the sulfide anions. Therefore, the solubility of the sulfide within the electrolyte is increased, thereby improving the charge / discharge efficiency characteristics of the lithium ions and the lifespan of batteries. Moreover, the organic electrolytic solution of the present invention may be used in any battery type where an anode is composed of lithium metal, and in particular, lithium sulfur batteries.

Description

[0001] Cross References to Related Applications [0002] This application claims priority from Korean Patent Application No. 2003-74661 filed with the Korean Intellectual Property Office on October 24, 2003, the disclosure of which is incorporated herein by reference in its entirety. technical field [0003] The invention relates to an organic electrolytic solution and a lithium battery using the organic electrolytic solution. In particular, the present invention relates to an organic electrolytic solution capable of stabilizing the surface of lithium metal to improve the charging / discharging efficiency of lithium batteries. Background technique [0004] As the requirements for small portable electronic devices increase, the requirements for batteries with high energy density as power sources also increase accordingly. In addition, more economical, safe and environmentally friendly batteries are also required. Lithium-sulfur batteries can meet the above demands due to thei...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M6/16H01M4/38H01M4/40H01M4/58H01M4/60H01M10/05H01M10/052H01M10/0567H01M10/0568H01M10/0569
CPCH01M10/0567Y02E60/122H01M10/0569H01M10/052Y02E60/10H01M10/0525
Inventor 金株烨金翰秀朴晋焕李锡守
Owner SAMSUNG SDI CO LTD
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