Abstract:
PURPOSE: A manufacturing method of an anode active material is provided to mass produce the anode active material which has high surface porosity, and uniform composition and particle size, and capable of adjusting a particle size and a shape of the anode material. CONSTITUTION: A manufacturing method of an anode active material for a lithium secondary battery comprises: a step of manufacturing a metal salt solution which includes a lithium source, a manganese source, a nickel source and cobalt source; a step of manufacturing a slurry by performing a wet grinding of the metal salt solution at 2000-6000 rpm for 2-12 hours with using a beads in which a particle diameter is 0.05-0.30 mm; a step of adding a carbon source in the slurry; a step of manufacturing s mixed powder by drying with spraying the slurry; a step of heat-treating the mixed powder. [Reference numerals] (AA) Voltage [V]; (BB) Capacity [mAh]
Abstract:
본 발명은 구형의 다공성 산화코발트를 이용한 비수계 리튬이차전지용 양극재료 및 그의 제조 방법에 관한 것으로, 액상에서의 침전반응을 이용하여 이종금속이 균일하게 치환되어 있는 구형의 다공성 산화코발트를 제조함으로써 최종 양극재료의 고전압에서의 구조 붕괴를 억제하여 수명특성을 향상시키기 위한 것이다. 본 발명에 따르면, 코발트원료, 수산화기원료, 치환용 이종금속원료 및 암모니아원료를 화학식, Co 1-x M x (OH) 2 (0.00≤x≤0.10, M=Al, Mg, Ti, etc)의 조성비를 갖도록 침전시켜서 5~25㎛의 입자크기를 갖는 구형의 수산화코발트를 제조할 수 있다. 그리고 제조된 수산화코발트를 500~800℃의 온도범위에서 5~20시간 유지시켜 5~25㎛의 입자크기를 갖는 구형의 산화코발트를 제조할 수 있다. 이러한 산화코발트를 사용하여 제조되는 양극재료는 4.5V 고전압 충방전 조건에서도 뛰어난 수명특성을 발현한다.
Abstract:
PURPOSE: A manufacturing method of a positive electrode material is provided to provide a positive electrode material having excellent charging/discharging efficiency and output performance, restraining deterioration. CONSTITUTION: A manufacturing method of a positive electrode material comprises: a wet grinding step of mixing lithium raw material, manganese raw material, aluminum raw material, and magnesium raw material, and manufacturing slurry by uniformly wet-grinding a mixture; a high dispersion step of manufacturing highly dispersed slurry by rotating the slurry by constant rate; a spraying/drying step manufacturing precursor spheres by hot-air drying the highly dispersed slurry, and a heat-treatment step of manufacturing a positive electrode material by heat-treating the precursor spheres.
Abstract:
PURPOSE: A positive electrode material for lithium is provided to have high capacity, excellent cycle performance and excellent charging/discharging efficiency, and to increase the discharging potential of battery due to high discharging potential against lithium. CONSTITUTION: A positive electrode material for lithium comprises a compound in chemical formula1. In the chemical formula 1, 0