MANUFACTURING METHOD OF POSITIVE ELECTRODE ACTIVE MATERIAL

• Main Authors: KIM DONG JIN, CHOI SANG SOON, KIM JAE GEUN, LEE WOO RAM
• Format: Patent
• Language: English; Korean
• Published: 17.11.2023
• 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 발명은 초기 용량과 수명 특성이 모두 우수한 전지를 구현할 수 있는 양극 활물질의 제조방법에 관한 발명으로, (A) 전체 금속 중 니켈(Ni)을 80몰% 이상 함유하는 양극 활물질 전구체와 리튬 함유 원료물질을 혼합한 후, 1차 소성하여 1차 소성품을 제조하는 단계; 및 (B) 상기 1차 소성품과 니켈 화합물을 혼합한 후, 2차 소성하여 리튬 전이금속 산화물을 제조하는 단계;를 포함하고, 상기 니켈 화합물은 상기 양극 활물질 전구체에 함유된 전체 금속 몰수를 기준으로 상기 니켈 화합물에 함유된 니켈의 몰%가 0.01몰% 초과 0.15몰% 미만이 되도록 첨가되는 것인 양극 활물질의 제조방법에 관한 것이다. The present invention relates to a method for preparing a positive electrode active material capable of implementing a battery excellent in both initial capacity and lifespan properties includes (A) mixing a positive electrode active material precursor containing 80 mol% or greater of nickel (Ni) in all metals with a lithium-containing raw material, and then performing primary firing on the mixture to prepare a primary fired product, and (B) mixing the primary fired product and a nickel compound, and then performing secondary firing on the mixture to prepare a lithium transition metal oxide, wherein the nickel compound is added such that the mol% of nickel contained in the nickel compound is greater than 0.01 mol% to less than 0.15 mol% based on the total number of moles of the metals contained in the positive electrode active material precursor.