Additives for lithium secondary battery

Disclosed is a lithium secondary battery comprising a cathode (C), an anode (A), a separator and an electrolyte, wherein the electrolyte comprises: (a) a nitrile group-containing compound and (b) a compound having a reaction potential of 4.7V or higher. The lithium secondary battery can prevent the...

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Bibliographische Detailangaben
Hauptverfasser:	JEONG, DAE JUNE, KIM, DONG-MYUNG, CHO, BEN-JAMIN, KIM, YONG-JEONG, YOON, JONG-MOON, BAE, JOON SUNG, JEONG, JUN-YONG
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	BASIC ELECTRIC ELEMENTS ELECTRICITY PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
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Beschreibung
Zusammenfassung:	Disclosed is a lithium secondary battery comprising a cathode (C), an anode (A), a separator and an electrolyte, wherein the electrolyte comprises: (a) a nitrile group-containing compound and (b) a compound having a reaction potential of 4.7V or higher. The lithium secondary battery can prevent the problems caused by a nitrile group-containing compound added to the electrolyte for the purpose of improving high-temperature cycle characteristics and safety (such problems as a battery swelling phenomenon and a drop in recovery capacity under high-temperature (> 80 DEG C) storage conditions), by adding a fluorotoluene compound.