High performance nanostructured bismuth oxide-cobaltite as a durable oxygen electrode for reversible solid oxide cells
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The high reactivity between bismuth oxide and cobaltite oxygen electrodes is a bottleneck in developing active and reliable bismuth oxide–cobaltite composite oxygen electrodes for solid oxide cells (SOCs). Herein, a Sr-free Sm0.95Co0.95Pd0.05O3−δ (SmCPd) oxygen electrode decorated with nanoscale Er0.4Bi1.6O3 (ESB) is synthesized and assembled on a barrier-layer-free Y2O3–ZrO2 (YSZ) electrolyte film. The cell with the ESB decorated SmCPd composite oxygen electrode exhibits a peak power density of 1.81 W cm−2 at 750 °C and 0.58 W cm−2 at 650 °C. More importantly, excellent operating stability is achieved in the fuel cell mode at 600 °C for 500 h, and in electrolysis and reversible modes at 750 °C for over 200 h. The results demonstrate the feasibility of applying bismuth oxide–cobaltite composite oxygen electrodes in developing high-performance and durable SOCs.
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In Situ Formation of Er0.4Bi1.6O3 Protective Layer at Cobaltite Cathode/Y2O3–ZrO2 Electrolyte Interface under Solid Oxide Fuel Cell Operation ConditionsHe, Shuai; Zhang, Qi; Maurizio, Giulio; Catellani, Lorenzo; Chen, K.; Chang, Q.; Santarelli, M.; Jiang, San Ping (2018)© Copyright 2018 American Chemical Society. Bismuth-based oxides exhibit outstanding oxygen ionic conductivity and fast oxygen surface kinetics and have shown great potential as a highly active component for electrode ...
Highly active and stable Er0.4Bi1.6O3 decorated La0.76Sr0.19MnO3+δ nanostructured oxygen electrodes for reversible solid oxide cellsAi, N.; Li, N.; He, S.; Cheng, Y.; Saunders, M.; Chen, K.; Zhang, T.; Jiang, San Ping (2017)Bismuth based oxides have excellent ionic conductivity and fast oxygen surface kinetics and show promising potential as highly active electrode materials in solid oxide cells (SOCs) such as solid oxide fuel cells (SOFCs) ...
Active, durable bismuth oxide-manganite composite oxygen electrodes: Interface formation induced by cathodic polarizationChen, M.; Cheng, Y.; He, S.; Ai, N.; Veder, Jean-Pierre; Rickard, William; Saunders, M.; Chen, K.; Zhang, T.; Jiang, San Ping (2018)Bismuth oxide is as an active promoter in enhancing the ionic conductivity and electrocatalytic activity of manganite oxygen electrodes of solid oxide cells, but there are very limited reports on the formation and evolution ...