Perovskite Sr2Fe1.5Mo0.5O6-δ as electrode materials for symmetrical solid oxide electrolysis cells

Journal Article · Fri Oct 01 04:00:00 EDT 2010 · International Journal of Hydrogen Energy

DOI:https://doi.org/10.1016/j.ijhydene.2010.08.016· OSTI ID:1381093

Liu, Qiang; Yang, Chenghao; Dong, Xihui; Chen, Fanglin

Perovskite Sr2Fe1.5Mo0.5O6-δ (SFM) has been successfully prepared by a microwave-assisted combustion method in air and employed as both anode and cathode in symmetrical solid oxide electrolysis cells (SOECs) for hydrogen production for the first time in this work. Influence of cell operating temperature, absolute humidity (AH) as well as applied direct current (DC) on the impedance of single cells with the configuration of SFM|La0.9Sr0.1Ga0.8Mg0.2O3 (LSGM)|SFM has been evaluated. Under open circuit conditions and 60 vol.% AH, the cell polarization resistance, RP is as low as 0.26 Ω cm2 at 900 °C. An electrolysis current of 0.88 A cm-2 and a hydrogen production rate as high as 380 mL cm-2 h have been achieved at 900 °C with an electrolysis voltage of 1.3 V and 60 vol.% AH. Further, the cell has demonstrated good stability in the long-term steam electrolysis test. The results showed that the cell electrolysis performance was even better than that of the reported strontium doped lanthanum manganite (LSM) – yttria stabilized zirconia (YSZ)|YSZ|Ni–YSZ cell, indicating that SFM could be a very promising electrode material for the practical application of SOEC technology.

• Research Organization: Energy Frontier Research Centers (EFRC) (United States). Heterogeneous Functional Materials Center (HeteroFoaM)
• Sponsoring Organization: USDOE SC Office of Basic Energy Sciences (SC-22)
• DOE Contract Number: SC0001061
• OSTI ID: 1381093
• Journal Information: International Journal of Hydrogen Energy, Journal Name: International Journal of Hydrogen Energy Journal Issue: 19 Vol. 35; ISSN 0360-3199
• Publisher: Elsevier
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
carbon sequestration
catalysis (heterogeneous)
charge transport
energy storage (including batteries and capacitors)
hydrogen and fuel cells
materials and chemistry by design
mechanical behavior
membrane
synthesis (novel materials)
synthesis (scalable processing)
synthesis (self-assembly)