Non-aqueous electrolyte secondary battery negative electrode, its manufacturing method, and non-aqueous electrolyte secondary battery

The present invention provides a negative and non-aqueous electrolyte secondary battery containing the same. The negative electrode uses Li-occluding element as a negative electrode active material to protect deformation of negative electrode or negative electrode active material from peeling off a...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: ITO SHUJI, UGAJI MASAYA, HASEGAWA MASAKI, HONDA KAZUYOSHI, KASHIWAGI KATSUMI, KOGETSU YASUTAKA
Format: Patent
Sprache:chi ; eng
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Beschreibung
Zusammenfassung:The present invention provides a negative and non-aqueous electrolyte secondary battery containing the same. The negative electrode uses Li-occluding element as a negative electrode active material to protect deformation of negative electrode or negative electrode active material from peeling off a negative electrode collector, and lithium will not precipitate to the negative electrode collector,and has an excellent large current discharge characteristic and an excellent discharge characteristic at a low temperature. The invention of negative electrode includes: a collector having a concave portion and a convex portion on the surface in the thickness direction; and a negative electrode active material layer having a plurality of columnar bodies containing a negative electrode active material which occludes and emits lithium ions. Furthermore, in the negative electrode, the columnar bodies grow with an inclination angle against the vertical direction wit respect to the collector surface and the inclination ang