CATHODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY LITHIUM SECONDARY BATTERY AND METHOD OF MANUFACTURING THE SAME

• Main Authors: KWEON HEE JUN, KIM SANG BOK, KIM JIK SOO, CHOI JI HOON, PARK SUNG SOON
• Format: Patent
• Language: English; Korean
• Published: 25.01.2021
• Subjects: BASIC ELECTRIC ELEMENTS; CHEMISTRY; COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F; COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM,CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THERARE-EARTH METALS; COMPOUNDS THEREOF; ELECTRICITY; INORGANIC CHEMISTRY; METALLURGY; NON-METALLIC ELEMENTS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The present invention relates to a positive electrode active material for a lithium secondary battery, comprising: lithium composite oxide: a first coating portion formed on a surface of the lithium composite oxide and containing aluminum; and a second coating portion formed on the first coating portion and containing boron. More specifically, the present invention relates to a positive electrode active material for a lithium secondary battery capable of improving stability and electrical properties of the secondary battery. 본 발명의 실시예들의 리튬 이차 전지용 양극 활물질은 리튬 복합 산화물, 리튬 복합 산화물의 표면 상에 형성되며 알루미늄을 함유하는 제1 코팅부 및 제1 코팅부 상에 형성되며 붕소를 함유하는 제2 코팅부를 포함한다. 이차 전지의 안정성 및 전기적 특성이 향상될 수 있다.