Hauptseite > Publikationsdatenbank > Electrochemical characterization of Fe-air rechargeable oxide battery in planar solid oxide cell stacks > print

001     824268
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024 7 _ |a 10.1016/j.jpowsour.2016.10.059
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024 7 _ |a 1873-2755
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082 _ _ |a 620
100 1 _ |a Fang, Qingping
|0 P:(DE-Juel1)145945
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245 _ _ |a Electrochemical characterization of Fe-air rechargeable oxide battery in planar solid oxide cell stacks
260 _ _ |a New York, NY [u.a.]
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520 _ _ |a Iron-air rechargeable oxide batteries (ROB) comprising solid oxide cells (SOC) as energy converters and Fe/metal-oxide redox couples were characterized using planar SOC stacks. The charge and discharge of the battery correspond to the operations in the electrolysis and fuel cell modes, respectively, but with a stagnant atmosphere consisting of hydrogen and steam. A novel method was employed to establish the stagnant atmosphere for battery testing during normal SOC operation without complicated modification to the test bench and stack/battery concept. Manipulation of the gas compositions during battery operation was not necessary, but the influence of the leakage current from the testing system had to be considered. Batteries incorporating Fe2O3/8YSZ, Fe2O3/CaO and Fe2O3/ZrO2 storage materials were characterized at 800 °C. A maximum charge capacity of 30.4 Ah per layer (with an 80 cm2 active cell area) with ∼0.5 mol Fe was reached with a current of 12 A. The charge capacity lost 11% after ∼130 ROB cycles due to the increased agglomeration of active materials and formation of a dense oxide layer on the surface. The round trip efficiencies of the tested batteries were ≤84% due to the large internal resistance. With state-of-the-art cells, the round trip efficiency can be further improved.
536 _ _ |a 135 - Fuel Cells (POF3-135)
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700 1 _ |a Berger, Cornelius M.
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700 1 _ |a Menzler, Norbert H.
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700 1 _ |a Bram, Martin
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700 1 _ |a Blum, Ludger
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773 _ _ |a 10.1016/j.jpowsour.2016.10.059
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