摘要
通过共沉淀控制结晶法制备Ni_(0.2)Fe_(0.4)Mn_(0.4)(OH)_(2)前驱体,文章系统研究了氨水作络合剂的浓度变化对其性能的影响。SEM结果表明:氨水作络合剂能得到一次颗粒细长,微观形貌良好的类球形前驱体。XRD结果表明:提升氨水浓度未使晶体结构发生变化,且结晶度得到了提高;当氨浓度为2.5g/L时,得到振实密度为1.74g/cm^(3),比表面积为16.45m^(2)/g的Ni_(0.2)Fe_(0.4)Mn_(0.4)(OH)_(2)前驱体。
Ni_(0.2)Fe_(0.4)Mn_(0.4)(OH)_(2) precursor is prepared by coprecipitation controlled crystallization method,and the effect of concentration changes of ammonia water as a complexing agent on its properties is systematically studied.SEM results show that using ammonia water as a complexing agent can obtain spheroid like precursors with elongated primary particles and good microscopic morphology.XRD results show that increasing the concentration of ammonia water cannot change the crystal structure,and the crystallinity is improved.When the ammonia concentration is 2.5g/L,a Ni_(0.2)Fe_(0.4)Mn_(0.4)(OH)_(2) precursor with a tap density of 1.74 g/cm and a specific surface area of 16.45m^(2)/g is obtained.
作者
吉同棕
钟盛文
JI Tongzong;ZHONG Shengwen(Jiangxi University of Science and Technology,Ganzhou 341099,China)
关键词
微观形貌
晶体结构
振实密度
比表面积
micromorphology
crystal structure
tap density
specific surface area
