LITHIUM BATTERY AND PREPARATION METHOD THEREFOR, CHARGING METHOD, AND POWER VEHICLE

The present disclosure a lithium battery and a preparation method thereof, a charging method and a powered vehicle. The lithium battery includes a positive electrode plate, a negative electrode plate, a separator located between the positive electrode plate and the negative electrode plate, and an e...

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Bibliographische Detailangaben
Hauptverfasser:	PAN, Yi, WANG, Liangjun, SUN, Huajun, MA, Yongjun, GUO, Zizhu
Format:	Patent
Sprache:	eng ; fre ; ger
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:	The present disclosure a lithium battery and a preparation method thereof, a charging method and a powered vehicle. The lithium battery includes a positive electrode plate, a negative electrode plate, a separator located between the positive electrode plate and the negative electrode plate, and an electrolyte solution. The negative electrode material layer of the negative electrode plate includes a lithium-silicon composite negative electrode active material. The negative electrode material layer has a protective layer on the surface or the lithium-silicon composite negative electrode active material has a protective layer on the surface. The protective layer includes a polymer matrix and a lithium salt. When the lithium battery is fully charged, the lithium-silicon composite negative electrode active material includes elemental lithium and a lithium-silicon alloy Li4.4Si, and the elemental lithium accounts for 15%-95% by mole of the lithium-silicon composite negative electrode active material.