NICKEL-COBALT-MANGANESE COMPOSITE HYDROXIDE, AND PRODUCTION METHOD THEREFOR

• Main Authors: KAMATA YASUTAKA, TOYA HIROYUKI
• Format: Patent
• Language: English; Korean
• Published: 24.02.2016
• 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

본 발명의 목적은 리튬 화합물과의 반응성이 우수하고, 열 안정성 및 전지 특성이 우수한 정극 활물질을 얻을 수 있는 니켈 코발트 망간 복합 수산화물을 얻는 것이다. 이를 위해, 본 발명에서는 비수계 전해질 2차 전지의 정극 활물질의 전구체가 되는 것이며, 일반식: NiCoMnM(OH)(0<x≤1/3, 0<y≤1/3, 0≤z≤0.1, M은 Mg, Al, Ca, Ti, V, Cr, Zr, Nb, Mo, W에서 선택되는 1종 이상의 원소임)로 표시되고, 질소 흡착에 의한 BET법에 따라 측정되는 비표면적이 3.0 ㎡/g∼11.0 ㎡/g이며, 또한, 산화 환원 적정으로부터 구해지는 Co와 Mn의 평균 가수가 2.4가 이상인 니켈 코발트 망간 복합 수산화물이 제공된다. Achieved is a nickel-cobalt-manganese composite hydroxide which is excellent in reactivity with a lithium compound, and able to achieve a positive electrode active material which has excellent thermal stability and battery characteristics. The nickel-cobalt-manganese composite hydroxide is intended to serve as a precursor for a positive electrode active material of a non-aqueous electrolyte secondary battery, and represented by a general formula: Ni l-x-y-z Co x MnyM z (OH) 2 (0 < x ‰¤ 1/3, 0 < y ‰¤ 1/3, 0 ‰¤ z ‰¤ 0.1, M represents one or more elements selected from Mg, Al, Ca, Ti, V, Cr, Zr, Nb, Mo, and W), and the nickel-cobalt-manganese composite hydroxide has a specific surface area of 3.0 to 11.0 m 2 /g as measured by a BET method through nitrogen adsorption, and an average valence of 2.4 or more for Co and Mn as obtained by redox titration.