【摘要】 球形Ni1/3Co1/3Mn1/3(OH)2是控制结晶-固相合成法制备球形LiNi1/3Co1/3Mn1/3O2的前驱体,Ni1/3Co1/3Mn1/3(OH)2的理化指标对LiNi1/3Co1/3Mn1/3O2综合性能具有深刻影响。为提高电池体积比容量,必须首先合成出高致密、晶型结构完整、颗粒形貌为球形的Ni1/3Co1/3Mn1/3(OH)2前驱体。采用络合共沉淀法制备出了高致密球形Ni1/3Co1/3Mn1/3(OH)2前驱体,研究了制备过程中反应温度、氨碱摩尔比、反应体系pH值、搅拌强度、反应周期等五大因素对高致密球形Ni1/3Co1/3Mn1/3(OH)2合成的影响机理。通过合理优化工艺,控制各项因素,制备出了球形、d50=8.5μm左右、振实密度≥2.3 g/cm3的高致密球形Ni1/3Co1/3Mn1/3(OH)2。更多还原

【Abstract】 The spherical Ni1/3Co1/3Mn1/3(OH)2 is the precursor to prepare spherical LiNi1/3Co1/3Mn1/3O2 by controlling crystallization and solid state reaction.The physicochemical properties of the Ni1/3Co1/3Mn1/3(OH)2 have a profound effect on the performance of LiN1/3Co1/3Mn1/3O2.The precursor Ni1/3Co1/3Mn1/3(OH)2 with high density,fine crystal structure and spherical morphology should be synthesized in order to improve the volumetric capacity of the battery.In this paper,the high density and spherical Ni1/3Co1/3Mn1/3(OH)2 precursor was synthesized by chemical co-precipitation,and the factors including reacting temperature,molar ratio of ammonia-alkali,pH value,stirring intensity and the reaction cycle that affected the synthesis of high density spherical Ni1/3Co1/3Mn1/3(OH)2 were studied.The high density and spherical Ni1/3Co1/3Mn1/3(OH)2 with d50=8.5 mm,and tap density ≥2.3 g/cm3 was synthesized by optimizing the process.更多还原