Morphology and particle growth of Mn-based carbonate precursor in the presence of ethylene glycol for high-capacity Li-rich cathode materials
Morphology and particle growth of Mn-based carbonate precursor in the presence of ethylene glycol for high-capacity Li-rich cathode materials
复制标题
用于高容量富锂正极材料的乙二醇存在下的锰基碳酸盐前驱体的形貌和颗粒生长
DOI：
10.1007/s11581-018-2569-4
复制
发表时间：
2019
期刊：
影响因子：
2.8
通讯作者：
Wu Xianwen
中科院分区：
文献类型：
--
作者：
Xiang Yanhong;Li Jian;Liao Qijun;Wu Xianwen
采用碳酸盐沉淀法在乙二醇存在下合成了锰基碳酸盐前驱体（Ni 0. 15Co 0. 15Mn 0. 7CO3）。通过对前驱体颗粒形貌和结构的监测，研究了前驱体颗粒在沉淀过程中的成核和生长过程。首先形成不规则形状的微米级松散团聚颗粒，然后颗粒逐渐长大并继续聚集成圆形。3.5 h后，在团聚体内观察到明显的偏析。最后，在老化过夜后获得的颗粒具有球形形状并且以窄的尺寸分布分散。乙二醇的添加对制备的Ni0.15Co0.15Mn0.7CO3的形貌和锂化Li1.2Ni0.12Co0.12Mn0.56O2的电化学性能有显著影响。
Mn-based carbonate precursor (Ni0.15Co0.15Mn0.7CO3) is synthesized by the carbonate precipitation in the presence of ethylene glycol. The nucleation and growth of precursor particles are investigated during the precipitation process by monitoring particle morphologies and structures. Primarily irregular-shaped and micron-sized loose agglomerate particles are formed and then the particles grow gradually and continue to aggregate with a round shape. After 3.5 h, obvious segregation is observed within the agglomerations. Finally, the particles obtained after aging overnight have a spherical shape and dispersed with a narrow size distribution. The additive of ethylene glycol shows significant effects on the morphology of the prepared Ni0.15Co0.15Mn0.7CO3and the electrochemical performance of lithiated Li1.2Ni0.12Co0.12Mn0.56O2.