Development of intertwined nanostructured multi-phase air electrodes for efficient and durable reversible solid oxide cells
APPLIED CATALYSIS B-ENVIRONMENTAL(2022)
摘要
The development of nanostructured electrodes of solid oxide cells is largely hindered by the high temperature sintering process and limited in the loading and choices of catalytic phases. Here, a nanostructured multi-phase air electrode is fabricated via facile combination of Gd0.2Ce0.8O1.9 (GDC) decorated PrBa0.8Ca0.2Co2O5+delta (PBCC) and direct assembly approach. The highly flexible decoration process and the in situ formation of multi-phases lead to the formation of intertwined core-shell type nanostructures with intimate electrode/electrolyte interface. A cell with a 40 wt% GDC decorated PBCC electrode achieves a peak power density of 1.74 W cm(-2) at 750 ? and an electrolysis current density of 1.77 A cm(-2) at 1.3 V with excellent durability for 200 h. The combined decoration and direct assembly approach provides a unique and general pathway to develop a new class of nanostructured air electrodes for efficient and durable solid oxide cells.
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关键词
Reversible solid oxide cells, Intertwined nanostructured electrodes, <p>Electrode/electrolyte interface</p>, Double perovskite, Multi-phases
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