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Investigation of A-site deficient Ba0.9Co0.7Fe0.2Nb0.1O3-δ cathode for proton conducting electrolyte based solid oxide fuel cells
被引:21
|作者:
Yang, Chenghao
[1
,2
]
Zhao, Fei
[3
]
Chen, Fanglin
[3
]
Liu, Meilin
[1
,4
]
机构:
[1] S China Univ Technol, Coll Environm Energy, New Energy Res Inst, Guangzhou 510006, Guangdong, Peoples R China
[2] S China Univ Technol, Key Lab Fuel Cell Technol Guangdong Prov, Guangzhou 510641, Guangdong, Peoples R China
[3] Univ S Carolina, Dept Mech Engn, Columbia, SC 29208 USA
[4] Georgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA
关键词:
Proton conducting;
Mixed conductor;
Solid oxide fuel cell;
Cathode;
PERMEABLE MEMBRANE;
PARTIAL OXIDATION;
SYNTHESIS GAS;
PEROVSKITE;
SOFCS;
BA1.0CO0.7FE0.2NB0.1O3-DELTA;
BACO0.7FE0.2NB0.1O3-DELTA;
SEPARATION;
METHANE;
ION;
D O I:
10.1016/j.ijhydene.2014.03.158
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:
A novel cathode material for proton conducting electrolyte based solid oxide fuel cells (SOFCs) of A-site deficient Ba0.9Co0.7Fe0.2Nb0.1O3-delta (BCFN) has been synthesized and characterized. The A-site deficient BCFN has demonstrated a thermal expansion coefficient (TEC) similar to that of BaZr0.1Ce0.7Y0.2O3-delta (BZCY) electrolyte, enhanced oxygen reduction activity and chemical stability. The application of BCFN in proton-conducting electrolyte-based SOFCs has been investigated, and the SOFCs with Ni-BZCY vertical bar BZCY vertical bar BCFN configuration demonstrate maximum cell power outputs of 180, 240 and 300 mW cm(-2) at 600, 650 and 700 degrees C, respectively. The cell polarization resistance is as low as 0.951, 0.387 and 0.201 Omega cm(2) under open circuit voltage (OCV) at 600, 650 and 700 degrees C, respectively. The cell maximum power density increases from 300 to 356 mW cm(-2) at 700 degrees C after over 118 h operating under a constant current of 300 mA cm(-2). Copyright (C) 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
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页码:8431 / 8436
页数:6
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