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Cell Performance Stability of HMFC using Ba(Ce1-xZrx)0.8Y0.2O3 Perovskite Type Proton Conductor as Electrolyte

Published online by Cambridge University Press:  26 February 2011

Masahiko Iijima ,
Naoki Ito ,
Shinichi Matsumoto  and
Satoshi Iguchi
Masahiko Iijima
Affiliation:
[email protected], TOYOTA MOTOR CORPORATION, FUEL CELL SYSTEM DEVELOPMENT GROUP, 1200,MISHUKU, SUSONO, 410-1193, Japan
Naoki Ito
Affiliation:
[email protected], TOYOTA MOTOR CORPORATION, Susono, 410-1193, Japan
Shinichi Matsumoto
Affiliation:
[email protected], TOYOTA MOTOR CORPORATION, Susono, 410-1193, Japan
Satoshi Iguchi
Affiliation:
[email protected], TOYOTA MOTOR CORPORATION, Susono, 410-1193, Japan
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Abstract

We have developed a new type of FC which shows high performance at intermediate temperatures to solve the disadvantage of using hydrocarbon as fuel to FC system. This new FC is an ultra-thin proton conductor electrolyte supported by a metal hydrogen membrane. We have named it Hydrogen Membrane Fuel Cell

The HMFC using BaCe0.8Y0.2O3 (BCY) as the electrolyte and pure Palladium as the substrate exhibits a high cell performance of 2.7 A/cm2 @0.5V, 873K and 1.8 A/cm2 @0.5V, 673K. But the BCY cell performance drops rapidly during several hours. It was inferred that this phenomenon is caused by BCY electrolyte dissolved by hydrothermal reaction with H2O vapor which was generated by the fuel cell reaction.

We studied the possibility as HMFC electrolyte of Ba(Ce0.5Zr0.5)0.8YO3 (BCZY) and BaZr0.8Y0.2O3 (BZY) which are exchanged the B site of BCY perovskite ceramic from Ce to Zr to improve the resistance against the hydrothermal dissolution. BCZY and BZY confirmed the resistance against the hydrothermal dissolution improved compared with BCY by analyzing after the hydrothermal treatment. The BCZY cell shows the same level of the performance as the BCY cell and the performance stability has improved over the BCY cell.

Keywords

thin filmionic conductorlaser ablation
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 972: Symposium AA – Solid-State Ionics—2006 , 2006 , 0972-AA01-08
Copyright
Copyright © Materials Research Society 2007

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