CATHODE ACTIVE MATERIAL PRECURSOR FOR LITHIUM SECONDARY BATTERY CATHODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY AND LITHIUM SECONDARY BATTERY

A cathode active material precursor for a lithium secondary battery according to embodiments of the present invention contains nickel and at least one metal other than nickel, and contains primary particles with a major axis length of 500 nm or less and an aspect ratio of 1.0 to 3.0, wherein the rat...

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Bibliographische Detailangaben
Hauptverfasser:	YOO KYUNG BIN, LEE JU WOOK, YOO YEONG BIN, PARK SUNG SOON, KIM JONG HWA
Format:	Patent
Sprache:	eng ; kor
Schlagworte:	BASIC ELECTRIC ELEMENTS CHEMISTRY COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F ELECTRICITY INORGANIC CHEMISTRY METALLURGY PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
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Beschreibung
Zusammenfassung:	A cathode active material precursor for a lithium secondary battery according to embodiments of the present invention contains nickel and at least one metal other than nickel, and contains primary particles with a major axis length of 500 nm or less and an aspect ratio of 1.0 to 3.0, wherein the ratio of the volume of micropores with a pore diameter of 2 nm or less to the total pore volume may be 1.40% or less. Accordingly, it is possible to implement a cathode active material in which side reactions with the electrolyte are suppressed, and a lithium secondary battery with improved lifespan and capacity. 본 발명의 실시예들에 따른 리튬 이차 전지용 양극 활물질 전구체는 니켈 및 니켈 외의 적어도 하나의 금속을 함유하고, 장축 길이가 500nm 이하이며 종횡비가 1.0 내지 3.0인 1차 입자들을 포함하고, 총 기공 부피에 대한, 기공 직경이 2nm 이하인 마이크로포어의 부피의 비율이 1.40% 이하일 수 있다. 이에 따라, 전해액과의 부반응이 억제된 양극 활물질과 수명 및 용량이 향상된 리튬 이차 전지를 구현할 수 있다.