ELECTROLYTE FOR NONAQUEOUS POWER STORAGE DEVICE AND LITHIUM ION SECONDARY BATTERY

PROBLEM TO BE SOLVED: To provide an electrolyte for nonaqueous power storage device, capable of providing a lithium ion secondary battery with high cycle life even when there is provided a positive electrode containing a positive electrode active material operating on 4.4 V (vsLi/Li) or higher volta...

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Bibliographische Detailangaben
Hauptverfasser:	HAMAZAKI SHINYA, MURAKAMI MASAHITO
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRIC ELEMENTS CAPACITORS CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES ORLIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE ELECTRICITY PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide an electrolyte for nonaqueous power storage device, capable of providing a lithium ion secondary battery with high cycle life even when there is provided a positive electrode containing a positive electrode active material operating on 4.4 V (vsLi/Li) or higher voltage.SOLUTION: The electrolyte for nonaqueous power storage device, containing nonaqueous solvent and lithium salt, is configured so that a convergence current value in constant-voltage charging of 4.9 V (vs graphite negative electrode) at 50°C is not more than 0.015 mA/cmand not less than 0.0001 mA/cm.