Endurance of Nafion-composite membranes in PEFCs operating at elevated temperature under low relative-humidity

被引：19

作者：

Sahu, A. K. ^{[2
]}

Jalajakshi, A. ^{[2
]}

Pitchumani, S. ^{[2
]}

Sridhar, P. ^{[2
]}

Shukla, A. K. ^{[1
]}

机构：

[1] Indian Inst Sci, Solid State & Struct Chem Unit, Bangalore 560012, Karnataka, India

[2] CSIR, Cent Electrochem Res Inst, Madras Unit, Madras 600113, Tamil Nadu, India

来源：

JOURNAL OF CHEMICAL SCIENCES | 2012年 / 124卷 / 02期

关键词：

Nafion SiO2 composite; nafion-MZP composite; nafion-1135; fluoride-ion-emission rate; gas-crossover; polymer electrolyte fuel cell; PEM FUEL-CELL; PLATINUM DISSOLUTION; GAS CROSSOVER; DEGRADATION; DURABILITY;

D O I：

10.1007/s12039-011-0211-3

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

PEFCs employing Nafion-silica (Nafion-SiO2) and Nafion-mesoporous zirconium phosphate (Nafion-MZP) composite membranes are subjected to accelerated-durability test at 100 degrees C and 15% relative humidity (RH) at open-circuit voltage (OCV) for 50 h and performance compared with the PEFC employing pristine Nafion-1135 membrane. PEFCs with composite membranes sustain the operating voltage better with fluoride-ion-emission rate at least an order of magnitude lower than PEFC with pristine Nafion-1135 membrane. Reduced gas-crossover, fast fuel-cell-reaction kinetics and superior performance of the PEFCs with Nafion-SiO2 and Nafion-MZP composite membranes in relation to the PEFC with pristine Nafion-1135 membrane support the long-term operational usage of the former in PEFCs. An 8-cell PEFC stack employing Nafion-SiO2 composite membrane is also assembled and successfully operated at 60 degrees C without external humidification.

引用

页码：529 / 536

页数：8

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