Effect of pinholes in electrolyte on re‐oxidation tolerance of anode‐supported solid oxide fuel cells
Effect of pinholes in electrolyte on re‐oxidation tolerance of anode‐supported solid oxide fuel cells
复制标题
电解质中的针孔对阳极支持的固体氧化物燃料电池再氧化耐受性的影响
DOI:
10.1002/fuce.202000062
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发表时间:
2021
期刊:
影响因子:
2.8
通讯作者:
Toshiyuki Hashida
中科院分区:
文献类型:
--
作者:
Keigo Kumada;Kazuhisa Sato;Tatsuya Kawada;Hirofumi Sumi;Hiroyuki Shimada;Toshiyuki Hashida
The effects of through‐thickness pinholes in an electrolyte on re‐oxidation and mechanical damage of anode‐supported solid oxide fuel cells are discussed in this paper. Pinholes with a dimension greater than approximately 10 μm were detected by dye penetrant inspection using half‐cells fabricated through a co‐sintering method. In single cells with such pinholes, the leakage of oxygen occurred through the through‐thickness pinholes under open‐circuit voltage (OCV) conditions when the fuel supply was discontinued. The oxygen leakage caused the oxidation of Ni in the anode, forming semicircular re‐oxidized regions on the electrolyte side of the anode substrate. The oxygen permeation fluxes in the electrolyte, which were deduced from the measured reduction in OCV during the operation of fuel shut‐off, are shown to correlate well with the time elapsed from the shut‐off of the fuel gas supply to the onset of mechanical damage monitored by acoustic emissions. The correlation indicates that the oxidation rate of the anode substrate is accelerated due to the presence of pinholes in the electrolyte, which can result in mechanical damages.
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DOI:
10.1149/07801.2355ecst
发表时间:
2017-05
期刊:
--
影响因子:
--
作者:
K. Kumada;Kazuhisa Sato;T. Hashida
通讯作者:
K. Kumada;Kazuhisa Sato;T. Hashida
影响因子:
9.2
作者:
J. Laurencin;G. Delette;B. Morel;F. Lefebvre-Joud;M. Dupeux
通讯作者:
J. Laurencin;G. Delette;B. Morel;F. Lefebvre-Joud;M. Dupeux
影响因子:
6.1
作者:
Taehyun Park;Yeageun Lee;S. Cha;Ikwhang Chang
通讯作者:
Ikwhang Chang
DOI:
10.1149/06801.2421ecst
发表时间:
2015
期刊:
--
影响因子:
--
作者:
S. Onuki;F. Iguchi;M. Shimizu;T. Kawada;H. Yugami
通讯作者:
H. Yugami
影响因子:
3.2
作者:
I. Garbayo;G. Dezanneau;C. Bogicevic;J. Santiso;I. Gràcia;N. Sabaté;A. Tarancón
通讯作者:
A. Tarancón