CAJ | 학술논문

以[Ni1/3Co1/3Mn1/3]3O4和氢氧化锂为原料,分别采用球磨法和液相法前处理工艺制备层状正极材料Li[Ni1/3Mn1/3Co1/3]O2.采用x-射线衍射(xRD)、场发射扫描电镜(FESEM)、恒流充放电等手段对材料的物理和电化学性能进行表征.结果表明:采用不同前处理工艺制备出的Li[Ni1/3Mn1/3Co1/3]O2材料在结构、形貌和电化学性能上有较大差异；与球磨处理法制备的材料相比,采用液相法前处理工艺制备的Li[Ni1/3Mn 1/3Co1/3]O2不但保持了前驱体较好的球形形貌,同时还具有较好的循环稳定性和倍率性能；该样品在20 mA/g电流密度下,首次放电容量为178 mA·h/g,50次循环后,容量保持率达98.7％；在1 000 mA/g电流密度下,样品容量为135 mA·h/g.
이[Ni1/3Co1/3Mn1/3]3O4화경양화리위원료,분별채용구마법화액상법전처리공예제비층상정겁재료Li[Ni1/3Mn1/3Co1/3]O2.채용x-사선연사(xRD)、장발사소묘전경(FESEM)、항류충방전등수단대재료적물리화전화학성능진행표정.결과표명:채용불동전처리공예제비출적Li[Ni1/3Mn1/3Co1/3]O2재료재결구、형모화전화학성능상유교대차이；여구마처리법제비적재료상비,채용액상법전처리공예제비적Li[Ni1/3Mn 1/3Co1/3]O2불단보지료전구체교호적구형형모,동시환구유교호적순배은정성화배솔성능；해양품재20 mA/g전류밀도하,수차방전용량위178 mA·h/g,50차순배후,용량보지솔체98.7％；재1 000 mA/g전류밀도하,양품용량위135 mA·h/g.
The layered Li[Ni1/3Mn1/3Co1/3]O2 was separately synthesized by pretreatment process of ball mill method and solution phase route,using[Ni1/3Co1/3Mn1/3]3O4 and lithium hydroxide as raw materials.The physical and electrochemical behaviors of Li[Ni1/3Mn1/3Co1/3]O2 were characterized by X-ray diffraction(XRD),scanning electron microscopy(SEM),field emission scanning electron microscopy(FESEM)and electrochemical charge/discharge cycling tests.The results show that the difference in pretreatment process results in the difference in compound Li[Ni1/3Co1/3Mn1/3]O2 structure,morphology and the electrochemical characteristics.The Li[Ni1/3Mn1/3Co1/3]O2 prepared by solution phase route maintains the uniform spherical morphology of the [Ni1/3Co1/3Mn1/3]3O4,and it exhibits a higher capacity retention and better rate capability than that prepared by ball mill method.The initial discharge capacity of this sample reaches 178 mA·h/g and the capacity retention after 50 cycles is 98.7％ at a current density of 20 mA/g.Moreover,it delivers high discharge capacity of 135 mA.h/g at a current density of 1 000 mA/g.