Titles:
ANODE FOR LITHIUM SECONDARY BATTERY AND LITHIUM SECONDARY BATTERY COMPRISING SAME
리튬이차전지용 음극 및 이를 포함하는 리튬이차전지
Abstracts:
The present invention provides an anode which enables rapid charging while satisfying high energy density needs, and a lithium secondary battery comprising the same. The anode comprises: a first anode active material composed of a silicon oxide based composite core and a crystalline carbon coating layer covering the silicon oxide based composite core; and a second anode active material composed of an artificial graphite core and an amorphous carbon coating layer covering the artificial graphite core.
본 발명에서는 고에너지 밀도 니즈를 충족하면서 급속 충전이 가능하도록 하는, 규소 산화물계 복합체 코어 및 상기 규소 산화물계 복합체 코어를 피복하고 있는 결정질 탄소 코팅층으로 구성된 제1 음극 활물질; 및 인조 흑연 코어 및 상기 인조 흑연 코어를 피복하고 있는 비정질 탄소 코팅층으로 구성된 제2 음극 활물질;을 포함하는 음극 및 이를 포함하는 리튬이차전지가 제공된다.
Applicant:
LG CHEMICAL LTD [KR] (주식회사 엘지화학)
Inventors:
SHIN SUN-YOUNG [KR] (신선영)
KIM DONG-HYUK [KR] (김동혁)
LEE YONG-JU [KR] (이용주)
KIM JE-YOUNG [KR] (김제영)
LEE SU-MIN [KR] (이수민)
Provided is a lithium ion battery comprising a negative electrode, wherein the negative electrode has a negative electrode active material layer containing lithium silicate particles and a binder. The lithium silicate particles comprise composite particles containing a lithium silicate phase and silicon particles dispersed in the phase. A carbon material is present in the interior of the composite particles, and the area percentage occupied by the carbon material in the composite particle cross section is 0.008 to 6%. The binder contains at least a first resin, wherein the first resin is at least one selected from the group consisting of polyacrylic acid, polyacrylate salts, and derivatives thereof. The content of the first resin present in the negative electrode active material layer is not more than 2 mass%.
