Low methanol permeable and high proton-conducting Nafion/calcium phosphate composite membrane for DMFC

被引：48

作者：

Park, YS ^{[1
]}

Yamazaki, Y ^{[1
]}

机构：

[1] Tokyo Inst Technol, Dept Innovat & Engineered Mat, Interdisciplinary Grad Sch Sci & Engn, Yokohama, Kanagawa, Japan

来源：

SOLID STATE IONICS | 2005年 / 176卷 / 11-12期

关键词：

Nation (R); calcium phosphate; conductivity; methanol crossover; DMFC;

D O I：

10.1016/j.ssi.2004.12.012

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：

Calcium phosphate (CP)/Nafion composite membranes were fabricated by incorporating CP into Nafion structure for the direct methanol fuel cells (DMFCs). This composite membrane showed lower methanol crossover compared to cast Nation and Nafion (R) 117. This is likely to be due to high crystallinity and low water uptake content in the composite membranes. In addition, the composite membranes containing CP2.5% and CP5% showed higher proton conductivity than cast Nafion from 50 to 100 degrees C. In relation to high proton conductivity, the absorption vibration at 2360 cm(-1) corresponding to sulfonic acid bridge represents high thermal stability in the composite membranes even at high temperature. Focused ion beam (FIB) micrograph displays well-developed three-dimensional channels in the surface and cross-section area within the composite membrane, allowing the various conducting paths and high conductivity. (c) 2004 Elsevier B.V. All rights reserved.

引用

页码：1079 / 1089

页数：11

共 53 条

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