Negative active material and negative electrode and lithium battery including the material

A negative active material includes a silicon-based alloy, and the silicon-based alloy includes a Si single phase, a FeSi 2 alpha phase, and a FeSi 2 beta phase, wherein an intensity ratio of a second diffraction peak of the FeSi 2 beta phase to a first diffraction peak of the FeSi 2 alpha phase may...

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Bibliographische Detailangaben
Hauptverfasser:	HANA YOO, HEEYOUNG CHU, SEUNGUK KWON, SOONSUNG SUH, DUKHYOUNG YOON, JAEHYUK KIM
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	BASIC ELECTRIC ELEMENTS ELECTRICITY MANUFACTURE OR TREATMENT OF NANOSTRUCTURES MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES NANOTECHNOLOGY PERFORMING OPERATIONS PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES TRANSPORTING
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Beschreibung
Zusammenfassung:	A negative active material includes a silicon-based alloy, and the silicon-based alloy includes a Si single phase, a FeSi 2 alpha phase, and a FeSi 2 beta phase, wherein an intensity ratio of a second diffraction peak of the FeSi 2 beta phase to a first diffraction peak of the FeSi 2 alpha phase may be 0.1 or higher. A negative electrode includes the negative active material and a lithium battery includes the negative electrode. Lifespan characteristics of the lithium battery including the negative active material may improve. 负极活性物质包括基于硅的合金，且基于硅的合金包括Si单相、FeSiα相、和FeSiβ相，其中FeSiβ相的第二衍射峰对FeSiα相的第衍射峰的强度比可为0.1或更高。负极包括所述负极活性物质并且锂电池包括所述负极。包括所述负极活性物质的锂电池的寿命特性可改善。