CuCl_2石墨层间化合物原子存在状态的XPS-ESCA研究

XPS-ESCA RESEARCH ON THE ATOMS STATE IN THE CuCl2 GRAPHITE INTERCALATION COMPOUND

采用Ｘ射线光电子分析仪（ＸＰＳ－ＥＣＳＡ）检测石墨层间化合物ＣｕＣｌ２－ＧＩＣ（ｇｒａｐｈｉｔｅｉｎｔｅｒｃａｌａｔｉｏｎｃｏｍｐｏｕｎｄｓ，ＧＩＣ）的Ｃ１ｓ，Ｃｌ２ｐ，Ｃｕ２ｐ谱和Ｃｕ的Ａｕｇｅｒ谱（ＡＣｕ）．研究ＧＩＣ的原子存在状态，发现在ＣｕＣｌ２－ＧＩＣ中，铜并不以单一价态存在，而是以一价、二价２种价态存在．推测ＣｕＣｌ２－ＧＩＣ中至少存在２种类型的Ｃｕ，Ｃｌ离子团．微区能谱成分分析得到Ｃｌ和Ｃｕ的摩尔比小于２，也证明了这个结论．回归分析认为这二价和一价阳离子的摩尔比为４３∶１．

XPS-ECSA was used to investigate the atoms state in GIC (graphite intercalation compounds) by the spectra of C1s,Cl2p,Cu2p and Auger spectra of the Cu atom. The exchange of the electrovalence of the cupric ion has been testified by the XPS_ESCA. Two kinds of ion units may exist in CuCl2-GIC, which consist of two kinds of electrovalence cupric ion respectively. Microanalysis of the chemical compounds by the X_ray energy spectrum scanning analysis of TEM testifies the conclusion that the mole ratio of chlorine and copper is less than 2, which is non_stoichoimetric. The mole ratio of the two valence and one valence cupper is 431, which is testified semi_quantitatively by regression analysis on the Cu2p spectra.