摘要
以硫酸锰、硫酸钴、硫酸镍、氨水为主要原料,碳酸钠作为沉淀剂,通过单因素实验、正交试验,以pH值、锂过量百分比、煅烧温度及陈化时间为变量,研究不同因素对三元前躯体振实密度的影响,通过试验得到的最佳参数:陈化时间为1 h,pH值为8.0,锂过量百分比为8%,煅烧温度为900℃,在此条件下前驱体的振实密度可高达2.699 g/mL。XRD和电镜分析结果表明,锂过量百分比8%时,材料具有良好的α-NaFeO_(2)型层状结构的纯相;制得的正极颗粒形貌规则,呈现出类球状,粒径分布均匀,有利于提升电化学性能。
In this paper,manganese sulfate,cobalt sulfate,nickel sulfate,ammonia water as the main raw materials,sodium carbonate as precipitating agent,through single factor test and orthogonal test,pH value,excess lithium,calcination temperature and aging time as variables,to study the influence of different factors on the three-dimensional pre-body vibration density,the optimal parameters obtained through the test are 1 h,pH value 8.0,excess lithium 8%.When the calcination temperature is 900℃,the solid density of the precursor can be as high as 2.699 g/mL under this condition.XRD and electron microscope analysis results show that the material has a goodα-NaFeO_(2)layered structure of pure phase when lithium excess is 8%.The prepared positive particles have regular morphology and uniform particle size distribution,which is conducive to improving electrochemical performance.
作者
韦世菊
邓园园
全军
谢雪珍
马皓皓
WEI Shiju;DENG Yuanyuan;QUAN Jun;XIE Xuezhen;MA Haohao(School of Chemistry and Materials,Guangxi Normal University of Science and Technology,Laibin 546100,China;Guangxi Key Laboratory of Green Preparation and Application of Inorganic Materials,Laibin 546100,China)
出处
《山东化工》
2026年第1期46-51,共6页
Shandong Chemical Industry
基金
广西科技计划项目(桂科AB22035053)
广西科技计划项目(AD20297139)
广西重点实验室运行补助项目(21-220-09)。
关键词
共沉淀法
正极材料
前驱体
高镍三元材料
coprecipitation method
positive electrode material
precursor
high nickel ternary material
