POSITIVE ACTIVE MATERIAL PRECURSOR AND MANUFACTURING METHOD THEREOF POSITIVE ACTIVE MATERIAL AND MANUFACTURING METHOD THEREOF LITHIUM RECHARGEABLE BATTERY INCLUDING THE SAME POSITIVE ACTIVE MATERIAL

• Main Authors: SONG, JUNG HOON, NAM, SANG CHEOL, LEE, SANG HYUK, HWANGBO, GEUN, PARK, HYE WON
• Format: Patent
• Language: English; Korean
• Published: 30.07.2018
• 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

Embodiments of the present invention provide a condition for maximizing a conglomeration (aggregation) effect of a seed formed in advance, instead of suppressing generation of a large amount of seeds at an initial stage of a coprecipitation operation when manufacturing a positive electrode active material precursor. Therefore, a normal state achieving time of the coprecipitation operation can be reduced, sphericity can be improved while a particle size and a shape of the obtained precursor are made uniform, and an electrochemical property of a positive electrode active material can be ensured. The positive electrode active material precursor comprises nickel-based metal hydroxide particles. 본 발명의 구현예들에서는, 양극 활물질 전구체 제조 시, 공침 운전 초기에 다량의 핵(seed)이 생성되는 것을 억제하는 대신, 이미 생성된 핵의 뭉침(응집) 효과를 극대화하는 조건을 제시한다. 이로써, 공침 운전의 정상 상태 도달 시간을 감축시킬 수 있고, 수득되는 전구체의 입경 및 형상을 균일하게 하면서도 구형도를 향상시킬 수 있는 한편, 양극 활물질의 전기화학적 특성을 확보하는 데에는 문제 없다.