Cr-poisoning under open-circuit condition in LaNi0.6Fe0.4O3–δ-based nano composite cathodes for solid oxide fuel cells prepared by infiltration process

2016 ◽  
Vol 26 (5) ◽  
pp. 1367-1372 ◽  
Author(s):  
Yeong-Ju CHOE ◽  
Jeong-Uk SEO ◽  
Kyoung-Jin LEE ◽  
Min-Jin LEE ◽  
Hae-Jin HWANG
Keyword(s):  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
Open Circuit ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Infiltration Process ◽  
Nano Composite ◽  
Composite Cathodes ◽  
Open Circuit Condition

scholarly journals Remarkable Ionic Conductivity in a LZO-SDC Composite for Low-Temperature Solid Oxide Fuel Cells

Nanomaterials ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 2277
Author(s):  
Zhengwen Tu ◽  
Yuanyuan Tian ◽  
Mingyang Liu ◽  
Bin Jin ◽  
Muhammad Akbar ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Ionic Conductivity ◽  
Low Temperature ◽  
Solid Oxide Fuel Cells ◽  
Ionic Conduction ◽  
Open Circuit ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Open Circuit Voltages ◽  
Composite Samples

Recently, appreciable ionic conduction has been frequently observed in multifunctional semiconductors, pointing out an unconventional way to develop electrolytes for solid oxide fuel cells (SOFCs). Among them, ZnO and Li-doped ZnO (LZO) have shown great potential. In this study, to further improve the electrolyte capability of LZO, a typical ionic conductor Sm0.2Ce0.8O1.9 (SDC) is introduced to form semiconductor-ionic composites with LZO. The designed LZO-SDC composites with various mass ratios are successfully demonstrated in SOFCs at low operating temperatures, exhibiting a peak power density of 713 mW cm−2 and high open circuit voltages (OCVs) of 1.04 V at 550 °C by the best-performing sample 5LZO-5SDC, which is superior to that of simplex LZO electrolyte SOFC. Our electrochemical and electrical analysis reveals that the composite samples have attained enhanced ionic conduction as compared to pure LZO and SDC, reaching a remarkable ionic conductivity of 0.16 S cm−1 at 550 °C, and shows hybrid H+/O2− conducting capability with predominant H+ conduction. Further investigation in terms of interface inspection manifests that oxygen vacancies are enriched at the hetero-interface between LZO and SDC, which gives rise to the high ionic conductivity of 5LZO-5SDC. Our study thus suggests the tremendous potentials of semiconductor ionic materials and indicates an effective way to develop fast ionic transport in electrolytes for low-temperature SOFCs.

Self-assembled dynamic perovskite composite cathodes for intermediate temperature solid oxide fuel cells

Nature Energy ◽  
2017 ◽  
Vol 2 (3) ◽  
Author(s):  
J. Felix Shin ◽  
Wen Xu ◽  
Marco Zanella ◽  
Karl Dawson ◽  
Stanislav N. Savvin ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
Solid Oxide ◽  
Intermediate Temperature ◽  
Oxide Fuel ◽  
Composite Cathodes ◽  
Self Assembled
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