Nafion-based composite electrolytes for proton exchange membrane fuel cells operating above 120°C with titania nanoparticles and nanotubes as fillers

被引：54
|
作者：
Matos, B. R. [1 ]
Santiago, E. I. [1 ]
Rey, J. F. Q. [2 ]
Ferlauto, A. S. [3 ]
Traversa, E. [4 ,5 ]
Linardi, M. [1 ]
Fonseca, F. C. [1 ]
机构：
[1] IPEN CNEN SP, BR-05508000 Sao Paulo, Brazil
[2] Univ Fed ABC, BR-09210170 Santo Andre, SP, Brazil
[3] Univ Fed Minas Gerais, Dept Fis, BR-31270901 Belo Horizonte, MG, Brazil
[4] Univ Roma Tor Vergata, I-00133 Rome, Italy
[5] Natl Inst Mat Sci, Int Ctr Mat Nanoarchitecton MANA, Tsukuba, Ibaraki 3050044, Japan
来源：
JOURNAL OF POWER SOURCES | 2011年 / 196卷 / 03期
基金：
巴西圣保罗研究基金会;
关键词：
Nafion; Composite; PEM fuel cell; Titania; Nanotubes; ELEVATED-TEMPERATURE; MESOPOROUS TITANIA; IONOMER MEMBRANES; ANGLE; HYDROGEN; PEMFC; STATE;
D O I：
10.1016/j.jpowsour.2010.08.025
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：
Nafion/titania-based fillers composites are prepared by casting and tested in proton exchange membrane fuel cells (PEMFCs) operating at elevated temperatures (130 degrees C). Three types of titania-based fillers are studied: nanoparticles with nearly spherical shape, mesoporous particles with high surface area, and hydrogen titanate nanotubes. Properties of composites related to PEMFC operation, such as water absorption/retention and proton conductivity, are determined and correlated with microstructural data obtained by small-angle X-ray scattering. The addition of titanate nanotubes changes more markedly the physical properties of the composite electrolytes as compared to titanium oxide nanoparticles with different surface area, a feature probably related to the intrinsic hydration and proton conductivity of the nanotubes. Polarization curves of H-2/O-2 PEMFCs using composite electrolytes indicate that composite electrolytes contribute to a significant boost of H-2/O-2 PEMFC performance at 130 degrees C. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码：1061 / 1068
页数：8
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