Abstract The Ce 0.8 Gd 0.2 O 2− δ (CGO) interlayer is commonly applied in solid oxide fuel cells (SOFCs) to prevent chemical reactions between the (La 1− x Sr )(Co y Fe )O 3− (LSCF) oxygen electrode and Y 2 3 -stabilized ZrO (YSZ) electrolyte. However, formation of YSZ–CGO solution with low ionic conductivity SrZrO (SZO) insulating phase still happens during cell production long-term operation,...

The use of active layers is a promising strategy to improve the properties air electrodes for solid oxide fuel cells (SOFCs). In this work, La0.8Sr0.2MnO3-δ combined with different ion conductors Ce0.9Gd0.1O1.95, Bi1.5Y0.5O3 and Pr6O11 form highly efficient nanocomposite in single step by spray-pyrolysis deposition. One main advantages these that nanoscale microstructure retained at relatively ...

A pure phase BaCo0.5Fe0.5O3–δ (BCF), which cannot be obtained before, is successfully prepared in this study by using the calcination method with a rapid cooling procedure. The successful preparation of BCF allows evaluation material as cathode for proton-conducting solid oxide fuel cells (H-SOFCs) first time. An H-SOFC achieves an encouraging cell perfor...

Development of alternative ceramic oxide anode materials is a key step for direct hydrocarbon solid oxide fuel cells (SOFCs). Several lanthanide based layered perovskite-structured oxides demonstrate outstanding oxygen diffusion rate, favorable electronic conductivity, and good oxygen surface exchange kinetics, owing to A-site ordered structure in which lanthanide and alkali-earth ions occupy a...

A dehydrogenation anode is reported for hydrocarbon proton conducting solid oxide fuel cells (SOFCs). A Cu-Cr(2)O(3) nanocomposite is obtained from CuCrO(2) nanoparticles as an inexpensive, efficient, carbon deposition and sintering tolerant anode catalyst. A SOFC reactor is fabricated using a Cu-Cr(2)O(3) composite as a dehydrogenation anode and a doped barium cerate as a proton conducting ele...

2017[28] THE HITACHI SCIENTIFIC INSTRUMENT NEWS ー 2017 Vol.8 Although the effi ciency and durability of electrochemical energy conversion devices such as solid oxide fuel cells (SOFCs) and electrolyzers (SOECs) are drastically affected by their surface and interfacial chemistry and morphology, it is only recently that more attention is being paid to their characterisation. The increasing demand...

This paper presents a hierarchical modeling approach for Solid-Oxide Fuel Cells from elementary kinetics to stacks. On a fundamental level, we have developed an analytical model for the evaluation of volume specific three-phase boundary length (vLtpb) in composite electrodes and electrochemical kinetics expressions to account for coverage dependent activation energies of various surface adsorbe...

The supply of energy services plays a major role in human society but also induces major environmental problems. Common efforts have to be focus on the development of new power conversion systems with reduced environmental impact and higher efficiencies to preserve the resources. Distributed power generation and cogeneration represent an attractive way for a more advantageous and sustainable fo...

Incorporating mixed oxygen-ion-electron conducting (MIEC) cathode materials is a promising strategy to make intermediate-temperature solid oxide fuel cells (IT-SOFCs) viable; however, a lack of fundamental understanding of oxygen transport in these materials limits their development. Density functional theory plus U (DFT+U) calculations are used to investigate how the Sr concentration affects t...

The present in situ study of electrochemically induced processes occurring in Cr/Ni bilayers in contact with a YSZ electrolyte aims at a molecular-level understanding of the fundamental aspects related to the durability of metallic interconnects in solid oxide fuel cells (SOFCs). The results demonstrate the potential of scanning photoelectron microspectroscopy and imaging to follow in situ the ...