Nano-tube TiO2 composite PVdF/LiPF6 solid membranes

被引：89

作者：

Chiang, CY ^{[1
]}

Reddy, MJ ^{[1
]}

Chu, PP ^{[1
]}

机构：

[1] Natl Cent Univ, Dept Chem, Chungli 32054, Taiwan

来源：

SOLID STATE IONICS | 2004年 / 175卷 / 1-4期

关键词：

nano-tube TiO2; composite PVdF electrolyte; DSC; X-ray photoelectron spectroscopy; ion conductivity;

D O I：

10.1016/j.ssi.2003.12.039

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Nano-tube TiO2 enhances ion conductivity of poly (vinyldene fluoride) (PVdF)/LiPF6 polymer electrolyte. Complexation structure and the lithium ion conductivity of the composite are examined. The X-ray photoelectron spectroscopy (XPS) C-1s and F-1s spin-orbital splitting photoelectrons spectrum of pure PVdF change enormously with the addition of the lithium salt and nano-tube TiO2. The results are consistent with a structure that the fluorine atoms in PVdF and oxygen atoms in inorganic oxide TiO2 are coordinating with the dissociated Li+ ions through acid-base interactions. The association hinders PVdF crystallization and reduces the crystallite size. This also changes the surface potential of PVdF and offset the sol dimension during film formation, confirmed by scanning electron microscopy (SEM). Such interactions explain miscibility between PVdF and nano-tube TiO2 is improved by the lithium salt. Compared to pure PVdF/LiPF6 electrolyte, the one order enhancement of ion conduction in nano-tube TiO2 composite polymer electrolyte is believed to have originated from the new ion conduction mechanism on TiO2 tube surface. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：631 / 635

页数：5

共 13 条

[1] Complexation of poly(vinylidene fluoride):LiPF6 solid polymer electrolyte with enhanced ion conduction in 'wet' form [J].