CATHODE ACTIVE MATERIAL AND LITHIUM SECONDARY BATTERY COMPRISING SAME

• Main Authors: NOH, Hyung Joo, CHOI, Moon Ho, SON, Jin Oh, YUN, Jin Kyeong, JEON, Jae Woo, SUH, Jun Won, JANG, Ye Ri, YUN, Mi Hye, KIM, Ju Chul
• Format: Patent
• Language: English; French; Korean
• Published: 05.05.2022
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The present invention relates to a cathode active material and a lithium secondary battery using a cathode including the cathode active material. More specifically, the present invention relates to a cathode active material and a lithium secondary battery using a cathode including the cathode active material, wherein the ratio of ammonia and caustic soda used in a co-precipitation reaction for synthesizing a precursor of a cathode active material is adjusted to control the pore area and shape of a lithium composite oxide contained in the cathode active material, thereby improving electrochemical properties and stability. La présente invention porte sur un matériau actif de cathode et sur une batterie rechargeable au lithium utilisant une cathode comprenant le matériau actif de cathode. Plus particulièrement, la présente invention concerne un matériau actif de cathode et une batterie rechargeable au lithium utilisant une cathode comprenant le matériau actif de cathode, le rapport d'ammoniac et de soude caustique utilisé dans une réaction de co-précipitation pour synthétiser un précurseur d'un matériau actif de cathode étant ajusté pour réguler la surface de pore et la forme d'un oxyde composite de lithium contenu dans le matériau actif de cathode, ce qui permet d'améliorer les propriétés électrochimiques et la stabilité. 본 발명은 양극 활물질 및 상기 양극 활물질이 포함된 양극을 사용하는 리튬 이차전지에 관한 것으로서, 보다 구체적으로 본 발명은 양극 활물질의 전구체를 합성하는 공침 반응시 사용되는 암모니아 및 가성 소다의 비율을 조절함으로써 상기 양극 활물질에 포함된 리튬 복합 산화물 중 공극 면적 및 형상을 제어함에 따라 전기화학적 특성 및 안정성이 향상된 양극 활물질 및 상기 양극 활물질이 포함된 양극을 사용하는 리튬 이차전지에 관한 것이다.