Fabrication and study of LaNi0.6Fe0.4O3-δ and Sm0.5Sr0.5CoO3-δ composite cathode for proton-conducting solid oxide fuel cells

A Novel Self‐Assembled Cobalt‐Free Perovskite Composite Cathode with Triple‐Conduction for Intermediate Proton‐Conducting Solid Oxide Fuel Cells

“…[17] Historically, proton-conducting electrolyte has been mixed with cathode materials to form composite cathodes for H-SOFCs. [3,11,12,18,19] It has been reported that the composite cathode not only increases the cathode reaction rate, but also adjusts the TEC of the cathode to satisfy thermal compatibility requirements. Later on, single-phase perovskite oxides capable of simultaneously transporting proton, oxygen ion, and electronic defects have been developed for H-SOFCs, leading to superior ORR activity.…”

Advancing cathodic electrocatalysis via an in situ generated dense active interlayer based on CuO5 pyramid-structured Sm2Ba1.33Ce0.67Cu3O9

“…Although the R P of the BSFBi0.3 cathode is slightly lower at 600 C, the SBCC cathode cell possesses a far superior power output. Clearly, the SBCC cathode reveals the lowest R P at 700 C and better polarization performance than most reported cathode materials at 600 C. In addition, the power performance is also much better than that of many recent modied cobalt-containing cathodes, e.g., Ba 0.4 K 0.1 Sr 0.5 Co 0.8 -Fe 0.2 O 3Àd , 52 LaNi 0.6 Fe 0.4 O 3Àd -Sm 0.5 Sr 0.5 CoO 3Àd (7 : 3 wt%), 53 Ba 0.5 Sr 0.5 Co 0.7 Fe 0.2 Mo 0.1 O 3Àd , 54 Pr 0.5 Ba 0.5 (Co 0.7 Fe 0.275 W 0.025 ) O 3Àd , 55 and La 0.5 Sr 0.5 Mn 0.9 Co 0.1 O 3Àd -BaZr 0.8 Y 0.2 O 3Àd , 56 which afford PPDs of 1275, 1427, 1217, 1100 and 1359 mW cm À2 at 700 C. In fact, the utilization of a thin interlayer obtained by PLD to optimize the cathode/electrolyte interface has been attempted in the literature, e.g., Pergolesi et al 31 adopted 100 nm thick porous La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3Àd lms, achieving the largest reported PPD of 110 mW cm À2 at 600 C for BaZr 0.8 Y 0.2 O 3Àd -based cells ten years ago. Recently, Choi et al 9 employed a dense thin ($100 nm) PrBa 0.5 Sr 0.5 Co 1.5 Fe 0.5 O 5+d interlayer onto the electrolyte BaZr 0.4 Ce 0.4 Y 0.1 Yb 0.1 O 3 surface to mitigate the contact resistance, giving evidence that the interlayer could advance the interfacial reaction.…”

“…In addition, the power performance is also much better than that of many recent modified cobalt-containing cathodes, e.g. , Ba 0.4 K 0.1 Sr 0.5 Co 0.8 Fe 0.2 O 3− δ , 52 LaNi 0.6 Fe 0.4 O 3− δ –Sm 0.5 Sr 0.5 CoO 3− δ (7 : 3 wt%), 53 Ba 0.5 Sr 0.5 Co 0.7 Fe 0.2 Mo 0.1 O 3− δ , 54 Pr 0.5 Ba 0.5 (Co 0.7 Fe 0.275 W 0.025 )O 3− δ , 55 and La 0.5 Sr 0.5 Mn 0.9 Co 0.1 O 3− δ –BaZr 0.8 Y 0.2 O 3−δ , 56 which afford PPDs of 1275, 1427, 1217, 1100 and 1359 mW cm −2 at 700 °C. In fact, the utilization of a thin interlayer obtained by PLD to optimize the cathode/electrolyte interface has been attempted in the literature, e.g.…”

Achieving Robust Redox Stability of SOFC through Ni-YSZ Anode Layer Thinning and Inert Support Mechanical Compensation

“…The pores inside the anode functional layer are much smaller than those of the 3Y-TZP support, which are beneficial to provide more active sites for fuel conversion. 29,30 Figure 1e shows the interface of the LSM-YSZ cathode functional layer and YSZ electrolyte, in which no peeling phenomenon is found, indicating that the composite cathode was in good contact with the electrolyte and that the cathode firing temperature of 1200 °C is appropriate. More high-magnification SEM images focusing on the cell structure of the 3Y-TZP supported SOFC can also be seen in our previous study.…”