LITHIUM SECONDARY BATTERY AND USAGE THEREOF

PROBLEM TO BE SOLVED: To improve the cycle characteristics of a lithium secondary battery using an electrode with an active material layer containing silicon (for example, amorphous silicon thin film) on a collector consisting of metal which is not alloyed with lithium (for example, copper foil), as...

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Bibliographische Detailangaben
Hauptverfasser:	JINNO MARUO, TAMURA NOBUYUKI, SATO KAZUYUKI
Format:	Patent
Sprache:	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:	PROBLEM TO BE SOLVED: To improve the cycle characteristics of a lithium secondary battery using an electrode with an active material layer containing silicon (for example, amorphous silicon thin film) on a collector consisting of metal which is not alloyed with lithium (for example, copper foil), as a negative electrode. SOLUTION: The lithium secondary battery is characterized in that in an X-ray diffraction pattern of CuK α rays of the negative electrode, after charging is carried out up to a charging depth in the range where a peak of a compound of lithium and silicon (for example, intermetallics compound such as Li13Si4), is recognized, for example, within the range from 18 to 28°C, then, discharge is carried out up to a discharge depth at which the peak disappears. COPYRIGHT: (C)2005,JPO&NCIPI