Development and Characterization of a New Type of Solid Electrolytes in the Form of Inorganic-Organic Nanohybrids

通过无机层状晶体与含醚基团的有机链的纳米杂交，研制出一种新型锂离子导体；通过接枝有机链对磷酸锆层状晶体的层间表面进行化学修饰，并通过插层反应与LiC10_4和LiCF_3SO_3等锂盐形成固溶体。α -和γ -磷酸锆被用作宿主基质。通过P-O-C酯键接枝到层间表面的有机链有CH_3(OCH_2CH_2) - (n=2,3)、H(OCH_2CH_2)_n - (n=2-4)、H(OCH_2CH_2) _3 -和H(OCH_2CH_2)_4 - 2。测定了锂盐在层间空间的溶解度，拉曼光谱显示，锂盐在层间空间完全解离，并被接枝有机链上的醚基配位。在室温下，不同锂盐用量制备的纳米复合材料的离子电导率范围为10^<-7> - 10^<-9> Scm^<-1>。四氢呋喃蒸气对固溶体的吸附，在室温下离子电导率高达10^<-5> μ m^<-1>。

A new type of lithium ionic conductors have been developed by the nanohybridiation of inorganic layered crystals and organic chains having ether groups; the interlayer surface of zirconium phosphate layered crystals was chemically modified by grafting the organic chains followed by formation of solid solutions with lithium salts such as LiC10_4 and LiCF_3SO_3 by an intercalation reaction.1. alpha- and gamma-forms of zirconium phosphate were used as host matrices. Organic chains grafted onto the interlayer surface through P-O-C ester bonds were CH_3(OCH_2CH_2) - (n=2,3), H(OCH_2CH_2)_n - (n=2-4), H(OCH_2CHCH_3)_3 -, and H(OCH_2CH_2)_4 -.2. The solubilities of the lithium salts into the interlayer space were determined, and a Raman spectroscopy revealed that the salts were completely dissociated in the interlayer space, and coordinated by the ether groups in the grafted organic chains.3. The ionic conductivities measured were in the range of 10^<-7> - 10^<-9> Scm^<-1> at room temperature for a variety of nanocomposites prepared with different amounts of lithium salts. Ionic conductivities as high as 10^<-5> Scm^<-1> at room temperature have been realized on adsorption of tetrahydrofuran vapor to the solid solutions.