CAJ | 학술논문

以碳酸氢铵为沉淀剂采用共沉淀法合成球形Co 0.9 Ni 0.05 Mn 0.05 CO 3前驱体，以碳酸盐前驱体和Li 2 CO 3为原料，在空气中通过固相反应制备出LiCo 0.9 Ni 0.05 Mn 0.05 O 2正极材料，研究烧结温度对产物结构及电化学性能的影响。采用扫描电镜(SEM)、X射线衍射(XRD)和光电子能谱(XRS)分别表征样品的形貌、结构和元素价态。结果表明：不同烧结温度下合成产物的性能差别很大，较适合的合成温度为900℃；在3.0~4.5 V电压范围内， LiCo0.9Ni0.05Mn0.05O2显示出较好的倍率性能；在25℃测试条件下，材料在0.2C、0.5C、1C、5C和10C时的放电比容量分别为181.6、178.3、173.9、167.8和157.1 mA?h/g。
이탄산경안위침정제채용공침정법합성구형Co 0.9 Ni 0.05 Mn 0.05 CO 3전구체，이탄산염전구체화Li 2 CO 3위원료，재공기중통과고상반응제비출LiCo 0.9 Ni 0.05 Mn 0.05 O 2정겁재료，연구소결온도대산물결구급전화학성능적영향。채용소묘전경(SEM)、X사선연사(XRD)화광전자능보(XRS)분별표정양품적형모、결구화원소개태。결과표명：불동소결온도하합성산물적성능차별흔대，교괄합적합성온도위900℃；재3.0~4.5 V전압범위내， LiCo0.9Ni0.05Mn0.05O2현시출교호적배솔성능；재25℃측시조건하，재료재0.2C、0.5C、1C、5C화10C시적방전비용량분별위181.6、178.3、173.9、167.8화157.1 mA?h/g。
The spherical precursor of metal carbonate, Co 0.9 Ni 0.05 Mn 0.05 CO 3 , was prepared by co-precipitation method using NH 4 HCO 3 as precipitating agent. LiCo 0.9 Ni 0.05 Mn 0.05 O 2 was prepared by solid-state reaction method in air using Co 0.9 Ni 0.05 Mn 0.05 CO 3 and Li 2 CO 3 as starting materials. The effects of sintering temperature on the structure and electrochemical properties of the product were studied. The morphology and structure of LiCo 0.9 Ni 0.05 Mn 0.05 O 2 were characterized by SEM and XRD, respectively. The valence state of transition metal was determined by XPS. The results show that sintering temperature has a critical role in the performance of the product and the suitable sintering temperature is 900℃. LiCo0.9Ni0.05Mn0.05O2 exhibits good cycle performance and high rate capability within the voltage range of 3.0?4.5 V. At 25 ℃, the initial discharge capacity are 181.6, 178.3, 173.9, 167.8 and 157.1 mA?h/g at 0.2C, 0.5C, 1C, 5C and 10C, respectively.