Sol gel hybrid membranes loaded with meso/macroporous SiO2, TiO2-P2O5 and SiO2-TiO2-P2O5 materials with high proton conductivity

被引：22

作者：

Castro, Yolanda ^{[1
]}

Mosa, Jadra ^{[1
]}

Aparicio, Mario ^{[1
]}

Perez-Carrillo, Lourdes A. ^{[2
]}

Vilchez, Susana ^{[2
]}

Esquena, Jordi ^{[2
]}

Duran, Alicia ^{[1
]}

机构：

[1] CSIC, ICV, Madrid 28049, Spain

[2] CIBER BBN, IQAC, CSIC, Barcelona 08034, Spain

来源：

MATERIALS CHEMISTRY AND PHYSICS | 2015年 / 149卷

关键词：

Inorganic compounds; Nanostructures; Thin films; Sol-gel; Electrical properties; CRYSTALLINE; MONOLITHS; EMULSIONS;

D O I：

10.1016/j.matchemphys.2014.11.028

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this work, highly conductive hybrid organic inorganic membranes loaded with SiO2, TiO2-P2O5 and SiO2-TiO2-P2O5 meso/macroporous particles were prepared via a sol gel process. Meso/macroporous particles were incorporated to hybrid membranes, for improving water retention and enhancing electrochemical performance. These particles with a polymodal pore size distribution were prepared by templating in highly concentrated emulsions, the particles showed a specific surface area between 50 m(2)/g (TiO2-P2O5) and 300 m(2)/g (SiO2-TiO2-P2O5). The particles were dispersed in a hybrid silica sol and further sprayed onto glass paper. The films were polymerized and sintered; those loaded with meso/macroporous particles had a homogenous distribution. High temperature proton conductivity measurements confirmed a high water retention. Conductivity of these materials is higher than that of Nafion (R) at higher temperatures (120 degrees C) (2.10(-2) S/cm). This study provides processing guideline to achieve hybrid electrolytes for efficient conduction of protons due to their high surface area and porous structure. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：686 / 694

页数：9

共 38 条

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