Assessment of PrBaCo<inf>2</inf>O<inf>5+d</inf> + Sm <inf>0.2</inf>Ce<inf>0.8</inf>O<inf>1.9</inf> composites prepared by physical mixing as electrodes of solid oxide fuel cells
MetadataShow full item record
The performance of PrBaCo2O5+d + Sm 0.2Ce0.8O1.9 (PrBC + SDC) composites as electrodes of intermediate-temperature solid oxide fuel cells is investigated. The effects of SDC content on the performance and properties of the electrodes, including thermal expansion, DC conductivity, oxygen desorption, area specific resistance (ASR) and cathodic overpotential are evaluated. The thermal expansion coefficient and electrical conductivity of the electrode decreases with an increase in SDC content. However, the electrical conductivity of a composite electrode containing 50 wt% SDC reaches 150 S cm-1 at 600 °C. Among the various electrodes under investigation, an electrode containing 30 wt% SDC exhibits superior electrochemical performance. A peak power density of approximately 1150 and 573 mW cm-2 is reached at 650 and 550 °C, respectively, for an anode-supported thin-film SDC electrolyte cell with the optimal composite electrode. The improved performance of a composite electrode containing 70 wt% PrBC and 30 wt% SDC is attributed to a reduction in the diffusion path of oxygen-ions within the electrode, which is a result of a three-dimensional oxygen-ion diffusion path in SDC and a one-dimensional diffusion path in PrBC. © 2010 Elsevier B.V.
Showing items related by title, author, creator and subject.
A double-layer composite electrode based on SrSc0.2Co0.8O3-d perovskite with improved performance in intermediate temperature solid oxide fuel cellsAn, B.; Guo, Y.; Ran, R.; Shao, Zongping (2010)Dual-layer composite electrodes consisting of a layer adjoining to an Sm0.2Ce0.8O1.9 (SDC) electrolyte composed of 70 wt.% SrSc0.2Co0.8O3-d + 30 wt.% Sm0.2Ce0.8O1.9 (SScC + SDC composite) and a second layer composed of ...
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 ...
Electrospinning based fabrication and performance improvement of film electrodes for lithium-ion batteries composed of TiO<inf>2</inf> hollow fibersYuan, T.; Zhao, B.; Cai, R.; Zhou, Y.; Shao, Zongping (2011)Film electrodes composed of 1D TiO<inf>2</inf> or TiO<inf>2</inf>/Ag composite hollow fibers were fabricated by a coaxial electrospinning technique, and were applied as the anode of lithium-ion batteries free of any binder ...