A novel BaFe0.8Zn0.1Bi0.1O3−δ cathode for proton conducting solid oxide fuel cells

Excellent Electrochemical Performance of La0.3Sr0.7Fe0.9Ti0.1O3−δ as a Symmetric Electrode for Solid Oxide Cells

“…The peak power density reaches 847 mW cm –2 at 800 °C, which is higher than the reported electrolyte-supported symmetric cells, such as Sr 2 Fe 1.5 Mo 0.5 O 6−δ (510 mW cm –2 at 800 °C), La 0.6 Ca 0.4 Fe 0.8 Ni 0.2 O 3−δ (507 mW cm –2 at 800 °C), and La 0.7 Sr 0.3 Fe 0.7 Ga 0.3 O 3−δ (489 mW cm –2 at 800 °C), and it can still reach 390 mW cm –2 when temperature is reduced to 700 °C. Although the performance of LSFTi 91 cell is lower than that of commercial Ni-based supported cells with 15 μm electrolyte (exceed 800 mW cm –2 at 700 °C), , it is the top level among 300 μm electrolyte-supported symmetric cells. The R p values are 0.13, 0.21, and 0.32 Ω cm 2 at 800, 750, and 700 °C, respectively.…”

“…The peak 51 and it can still reach 390 mW cm −2 when temperature is reduced to 700 °C. Although the performance of LSFTi 91 cell is lower than that of commercial Ni-based supported cells with 15 μm electrolyte (exceed 800 mW cm −2 at 700 °C), 52,53 it is the top level among 300 μm electrolyte-supported symmetric cells.…”

Materials development and prospective for protonic ceramic fuel cells

“…Due to the challenges encountered with the use of BaCeO 3 -based oxides as electrolyte materials for protonconducting solid oxide fuel cells, efforts were channeled toward developing materials with excellent mixed conductivity and satisfactory stability against water and acidic atmospheres. 79,85,92,[117][118][119][120][121][122][123] Some of those strategies employed were (a) co-doping of BaCeO 3 using various suitable elements which could either be metallic or nonmetallic and (b) introduction of phases with high stability properties to the BaCeO 3 -based material in the form of composite material development. Based on the outcome of various research works, zirconium was found to be the most suitable element to improve the stability of BaCeO 3, 107 although at the expense of other electrical properties of the material as will be discussed in the next section.…”

Enhanced oxygen reduction reaction activity of BaCe0.2Fe0.8O3-δ cathode for proton-conducting solid oxide fuel cells via Pr-doping

“…In addition, the thermal expansion coefficients (TECs) of BaFeO3-δ-based materials are generally close to 20×10 -6 K -1 [9,19,20], which are much higher than those of PCFC electrolytes such as BZCY (10.2×10 -6 K -1 ) [10]. BaFeO3-δ-based materials are usually mixed with electrolyte materials through solid-mixing or infiltration to alleviate the thermal expansion mismatch [19,21,22]. However, these processes are complex and time-consuming, and problems like limited interface for reaction caused by inhomogeneous mechanical mixing and structure degradation of the infiltrated electrodes are innegligible [1,23].…”