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Novel composite fuel electrode for CO2/CO-RSOCs
- Publication Year :
- 2021
- Publisher :
- IOP Publishing Ltd, 2021.
-
Abstract
- Reversible solid oxide cell (RSOC) technology allows use of a single device to efficiently derive chemicals from power (power-to-fuel) and power from chemicals (fuel-to-power). Fuel flexibility is a key aspect, as developing SOCs able to operate on fuels other than hydrogen can ease their integration into existing infrastructure. In addition, H2O and/or CO2 reduction is favorable in SOECs as polarization losses are reduced at high temperature. Here, a composite fuel electrode, 60 wt.% La0.6Sr0.4Fe0.8Mn0.2O3-δ (LSFMn) and 40 wt.% (5 wt.% Ni)-containing Ce0.85Sm0.15O2-δ (Ni-SDC) was investigated in H2-fueled, CO-fueled SOFCs and for CO2 reduction in SOEC mode. In reducing conditions, Fe exsolved from the LSFMn perovskite formed a Ni-Fe alloy with Ni present on SDC. The composite fuel electrode showed remarkable activity for CO2 reduction with a current density output of 1.40 A cm-2 (1.5 V) at 850 °C. SOFC/SOEC cell reversibility was obtained in different CO2:CO mixtures. Electrochemical impedance spectroscopy analysis was used to better understand cell mechanisms in SOFC and SOEC mode.
- Subjects :
- Materials science
Renewable Energy, Sustainability and the Environment
Composite number
Settore ING-IND/22
Solid Oxide
Condensed Matter Physics
Electrocatalyst
High Temperature Materials
Surfaces, Coatings and Films
Electronic, Optical and Magnetic Materials
Chemical engineering
Electrode
Materials Chemistry
Electrochemistry
Energy transformation
Fuel Cells
Electrocatalysis
Energy Conversion
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....c4cb1db00586f67a6616659865ad93e6