OLIVINE-BASED CATHODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY AND METHOD FOR PREPARING SAME

The present embodiments relate to an olivine-based cathode active material for a lithium secondary battery and a method for preparing same. The olivine-based cathode active material for a lithium secondary battery according to an embodiment comprises: a core part; and a carbon coating layer located...

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Bibliographic Details
Main Authors PARK, Jong Il, NAM, Sang Cheol
Format Patent
LanguageEnglish
French
Korean
Published 27.06.2024
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Summary:The present embodiments relate to an olivine-based cathode active material for a lithium secondary battery and a method for preparing same. The olivine-based cathode active material for a lithium secondary battery according to an embodiment comprises: a core part; and a carbon coating layer located on the surface of the core part, and satisfies the following relational expression 1. [Relational expression 1] 13.0 < C%*BET/m < 40.0, wherein in relational expression 1, C% is the wt% of the coating layer, BET is the specific surface area of the olivine-based cathode active material for a lithium secondary battery, and m is the tap density of the olivine-based cathode active material for a lithium secondary battery. Les présents modes de réalisation concernent un matériau actif de cathode à base d'olivine pour une batterie secondaire au lithium et son procédé de préparation. Le matériau actif de cathode à base d'olivine pour une batterie secondaire au lithium selon un mode de réalisation comprend une partie noyau et une couche de revêtement au carbone située sur la surface de la partie noyau et satisfaisait à l'expression relationnelle suivante 1 : [expression relationnelle 1] 13,0 < C % * BET/m < 40,0. Dans l'expression relationnelle 1, C % est le pourcentage en poids de la couche de revêtement, BET est la surface spécifique du matériau actif de cathode à base d'olivine pour une batterie secondaire au lithium, et m est la masse volumique après tassement du matériau actif de cathode à base d'olivine pour une batterie secondaire au lithium. 본 실시예들은 리튬 이차 전지용 올리빈계 양극 활물질, 이의 제조방법에 관한 것이다. 일 실시예에 따른 리튬 이차 전지용 올리빈계 양극 활물질은 코어부; 및 상기 코어부의 표면에 위치하는 탄소 코팅층;을 포함하고, 하기의 관계식 1을 만족한다. [관계식 1] 13.0 < C%*BET/m < 40.0 상기 관계식 1에서 C%는 탄소 코팅층 중량%이고, BET는 리튬 이차 전지용 올리빈계 양극 활물질의 비표면적이며, m은 리튬 이차 전지용 올리빈계 양극 활물질의 탭밀도이다.
Bibliography:Application Number: WO2022KR21272