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Sr 2 Fe 1.5 Mo 0.5 O 6– δ – Zr 0.84 Y 0.16 O 2– δ Materials as Oxygen Electrodes for Solid Oxide Electrolysis Cells
Author(s) -
Li J.,
Zhong C.,
Meng X.,
Wu H.,
Nie H.,
Zhan Z.,
Wang S.
Publication year - 2014
Publication title -
fuel cells
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.485
H-Index - 69
eISSN - 1615-6854
pISSN - 1615-6846
DOI - 10.1002/fuce.201400021
Subject(s) - yttria stabilized zirconia , materials science , electrolysis , electrode , oxide , oxygen , clark electrode , polarization (electrochemistry) , hydrogen , analytical chemistry (journal) , electrolytic cell , composite material , cubic zirconia , metallurgy , chemistry , ceramic , organic chemistry , chromatography , electrolyte
The high‐temperature solid oxide electrolysis cell (SOEC) is one of the most promising devices for hydrogen mass production. To make SOEC suitable from an economical point of view, each component of the SOEC has to be optimized. At this level, the optimization of the oxygen electrode is of particular interest since it contributes to a large extent to the cell polarization resistance. The present paper is focused on an alternative oxygen electrode of Zr 0.84 Y 0.16 O 2– δ ‐Sr 2 Fe 1.5 Mo 0.5 O 6– δ (YSZ‐SFM). YSZ‐SFM composite oxygen electrodes were fabricated by impregnating the YSZ matrix with SFM, and the ion‐impregnated YSZ‐SFM composite oxygen electrodes showed excellent performance. For a voltage of 1.2 V, the electrolysis current was 223 mA cm −2 , 327 mA cm −2 and 310 mA cm −2 at 750 °C for the YSZ‐SFM10, YSZ‐SFM20, and YSZ‐SFM30 oxygen electrode, respectively. A hydrogen production rate as high as 11.46 NL h −1 has been achieved for the SOEC with the YSZ‐SFM20 electrode at 750 °C. The results demonstrate that YSZ‐SFM fabricated by impregnating the YSZ matrix with SFM is a promising composite electrode for the SOEC.