摘要
采用透射电镜研究了以膨胀石墨为主体材料合成的ＣｕＣｌ２－ＥＧＩＣｓ微观结构，包括垂直和平行石墨碳原子层的层间结构、层面结构．根据Ｘ射线衍射参数计算获得２、３、４阶ＣｕＣｌ２－ＥＧＩＣｓ的层间距Ｉｃ值，与理论计算值近似．选区电子衍射获得面内结构参数．发现ＥＧＩＣｓ衍射斑点是由石墨碳原子层单斑点和氯化物层多斑点簇组两套相迭而成．ＥＧＩＣｓ层面内碳原子层原子排布保持了石墨六角网格状的特点;氯化钢分子相对碳原子层分布有三种堆垛方式．倒易点分析认为有（２ｘ２）Ｒ（３０°）、（７ｘ７）Ｒ（０°）、（３ｘ３）Ｒ（０°）三种超晶格结构．二阶、三阶ＣｕＣｌ２－ＧＩＣ中氯化铜点阵与碳原子点阵之间存在３０°的偏转角，而在一阶ＣｕＣｌ２－ＧＩＣ中偏转角等于零度．根据高分辨电镜（ＨＲＥＭ）、选区电子衍射（ＳＡＤ）、能谱微区成分、光电子能潜（ＸＰＳ－ＥＳＣＡ）和俄歇电子能谱（ＸＡＥＳ）等结果，探讨和分析了ＣｕＣｌ２－ＥＧＩＣｓ微观结构．
The layer and in-plane structure of CuCl2-GICs, synthesized with expanded graphite,was detected by TEM. The I_c values of the 2-,3-,4-stage CuCl2-GICs calculated on the X-raydiffraction patterns was similar to the theoretical values. The parameter of the in-plane structurewas calculated on the selected area electron diffraction pattern. The diffraction spots of the GICsconsist of single spots of carbon atom plane of graphite and triple spots of chloride. The singlespots imply that carbon atom of the in-plane of GICs is put in the order of the hexagonal net ofgraphite. Compared with the size of carbon atom, the triple spots of chloride signify that thereare three sizes of the molecule of cupric chloride. According to the lattice of CuCl2-GICs, thereare three kinds of super-structure:(2x2)R(30°), (7 x7)R(0°), (3 x 3)R(0°). The angles ofthe lattice of cupric chloride and carbon atom are 30° in the 2-stage and 3-stage CuCl2-GICs, 0°in. 1-stage CuCl2-GICs. According to electron diffraction pattern, high resolution image, chemicalcompounds analyses, XPS-ESCA and XAES, the frame of micro-structure of the CuCl2-GICs wasmade.
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
2000年第1期79-87,共9页
Journal of Inorganic Materials
基金
中国地质大学(北京)矿物岩石材料国家实验室开放基金
关键词
石墨层间化合物
GIC
微观结构
TEM
膨胀石墨
graphite intercalation compounds(GICs)
micro-structure
TEM
electron diffraction
high resolution image
