摘要
为了研究具有α-Na Fe O2结构的复杂钴氧化物原子排列规律,采用固相反应合成了Li0.5Na0.5Co O2多晶粉末,并利用X射线衍射(XRD)、扫描电子显微分析(SEM)和透射电子显微分析(TEM)等检测手段对其形貌、晶体结构等进行了表征。结果表明:一般处理状态下,Li0.5Na0.5Co O2为片状,其晶体结构与层状Li Co O2相似,但在某些处理状态下通过TEM观察到沿[0001]带轴衍射花样中出现菱面体晶系中应该消光{10 1 0}的晶面族。这说明Li0.5Na0.5Co O2的晶体结构已经由菱面体结构转变成六方结构。
In order to research the structure of complex cobalt oxide compounds with the similar crystallographic features of α-Na Fe O2, the solid state reaction was used to prepare the Li0.5Na0.5Co O2, whose crystal structure and morphology were characterized by X-ray diffractometry（XRD）, scanning electron microscopy（SEM）, transmission electron microscopy（TEM）. The results show that, under normal conditions, the platelet-like Li0.5Na0.5Co O2 and layered Li Co O2（R 3 M） have similar crystal structures. However, the extinction spots of crystal-plane {10 1 0} of rhombohedral R 3 m space group in [0001] zone axis is detected in TEM patterns, which indicates that the crystal structure of Li0.5Na0.5Co O2 has transformed from rhombohedra system to hexagonal system.
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2015年第7期1897-1903,共7页
The Chinese Journal of Nonferrous Metals
基金
长沙市科技计划资助项目(K 1005011-11)
