USING METHOD OF LITHIUM ION SECONDARY BATTERY

To provide a using method of suitably maintaining capacity of a lithium ion secondary battery including a Si-containing negative electrode active material and a method of recovering capacity of a lithium ion secondary battery including a Si-containing negative electrode active material having a redu...

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Bibliographische Detailangaben
1. Verfasser:	NAKAGAKI YOSHIHIRO
Format:	Patent
Sprache:	eng ; jpn
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:	To provide a using method of suitably maintaining capacity of a lithium ion secondary battery including a Si-containing negative electrode active material and a method of recovering capacity of a lithium ion secondary battery including a Si-containing negative electrode active material having a reduced capacity.SOLUTION: Provided is a using method of a lithium ion secondary battery, including a negative electrode including a Si-containing negative electrode active material, normally used with negative electrode maximum potential Eduring discharge being less than 0.65 V(vsLi/Li). When it reaches a predetermined state, the lithium ion secondary battery discharges to negative electrode potential Ehigher than negative electrode maximum potential Eduring a normal use.SELECTED DRAWING: None 【課題】Ｓｉ含有負極活物質を備えるリチウムイオン二次電池の容量を好適に維持する使用方法、さらには、容量が低下したＳｉ含有負極活物質を備えるリチウムイオン二次電池の容量を回復する方法を提供する。【解決手段】Ｓｉ含有負極活物質を具備する負極を備え、放電時の負極最大電位Ｅ０を０．６５Ｖ（ｖｓＬｉ／Ｌｉ＋）未満として通常使用されるリチウムイオン二次電池の使用方法であって、所定の状態となった際に、通常使用時の負極最大電位Ｅ０よりも高い負極電位Ｅ１まで放電することを特徴とするリチウムイオン二次電池の使用方法。【選択図】なし