METHOD OF POSITIVE ACTIVE MATERIAL FOR RECHARGEABLE LITHIUM BATTERY

• Main Authors: LEE JAEHO, HAN JUNGMIN, KIM KIHYUN, HONG MINGZI, PARK DOHYUNG
• Format: Patent
• Language: English; Korean
• Published: 13.09.2021
• Subjects: 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

The present invention provides a cathode active material for a lithium secondary battery, a manufacturing method thereof, and a lithium secondary battery including the same, wherein the cathode active material includes: a lithium metal compound and a phosphorus (P)-containing compound positioned on a surface of the lithium metal compound, wherein the phosphorus (P) content in the phosphorus-containing compound is 0.1 to 10 atomic % with respect to the total atomic weight of the element present on a surface of the cathode electrode active material. Therefore, the present invention exhibits a high capacity and has excellent lifespan characteristics, as well as a small amount of gas generated and thus excellent stability. 리튬 금속 화합물 및 상기 리튬 금속 화합물의 표면에 위치하는 인(P) 함유 화합물을 포함하고, 상기 인 함유 화합물에 함유된 인(P)의 함량은 양극 활물질 표면에 존재하는 원소들의 총 원자량에 대하여 0.1 원자% 내지 10 원자%인 리튬 이차 전지용 양극 활물질, 이의 제조 방법 및 이를 포함하는 리튬 이차 전지가 제공된다.