AN ANODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY AND A METHOD FOR MANUFACTURING THE SAME

According to an embodiment of the present invention, provided are a negative electrode active material for a lithium secondary battery, which increases the charging and discharging efficiency by uniformly distributing and precipitating only an active metal in a matrix through heat treatment of a sil...

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Bibliographische Detailangaben
Hauptverfasser:	SON, HYUN TAEK, KIM, HYANG YEON, LEE, SUNG HO
Format:	Patent
Sprache:	eng ; kor
Schlagworte:	ALLOYS BASIC ELECTRIC ELEMENTS CHEMISTRY ELECTRICITY FERROUS OR NON-FERROUS ALLOYS METALLURGY PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	According to an embodiment of the present invention, provided are a negative electrode active material for a lithium secondary battery, which increases the charging and discharging efficiency by uniformly distributing and precipitating only an active metal in a matrix through heat treatment of a silicon-based amorphous alloy; and a manufacturing method thereof. According to an embodiment of the present invention, the negative electrode active material for a lithium secondary battery comprises an amorphous alloy which is an amorphous alloy and consists of silicon (Si), aluminum (Al), iron (Fe), copper (Cu), and an additive element. The amorphous alloy is prepared by a liquid rapid solidification method, and the added element is zirconium (Zr) or nickel (Ni). A Cu Clustering effect is realized through heat treatment on the amorphous alloy, and thus a silicon (Si) phase is uniformly distributed and precipitated. 본 발명의 일실시 예는 실리콘계 아몰퍼스 합금의 열처리를 통해 활성금속만이 매트릭스에 균일하게 분산 석출될 수 있도록 하여 충방전 효율을 증대시키는 리튬이차전지 음극활물질 및 이의 제조방법을 제공한다. 본 발명의 실시 예에 따른 리튬이차전지 음극활물질은 실리콘(Si), 알루미늄(Al), 철(Fe), 구리(Cu) 및 첨가원소로 조성되며 비정질 합금인 아몰퍼스합금;을 포함하고, 아몰퍼스합금은 액체급랭응고법에 의해 제조되며, 첨가원소는 지르코늄(Zr) 또는 니켈(Ni)이고, 아몰퍼스합금에 대한 열처리를 통해 구리 클러스터링(Cu Clustering) 효과가 구현되어 실리콘(Si)상이 균일하게 분산 석출된다.