Hauptseite > Publikationsdatenbank > Implementation of developed storage material for first prototypes of high-temperature rechargeable oxide batteries (ROB) > print

001     189479
005     20240711101513.0
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037 _ _ |a FZJ-2015-02639
041 _ _ |a English
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|a Tokariev, O.
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111 2 _ |a 90th DKG Annual Conference & Symposium on High-Performance Ceramics 2015
|c Bayreuth
|d 2015-03-15 - 2015-03-18
|g DKG-2015
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245 _ _ |a Implementation of developed storage material for first prototypes of high-temperature rechargeable oxide batteries (ROB)
260 _ _ |c 2015
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520 _ _ |a This work focuses on the fundamental research of porous storage materials for a novel high temperature rechargeable oxide battery (ROB). In the battery, a solid oxide cell (SOC) runs alternately in fuel cell (discharge cycle) and electrolyzer (charge cycle) mode. The stagnant atmosphere in the battery, consisting of H2 and H2O vapor, is used as reducing and oxidizing agent for a metal-metal oxide material, which serves as the integrated energy storage unit. The storage components have to meet requirements such as: good kinetics of redox reactions, high oxygen storage capacity, and high lifetime, in order to assure a continuous ROB operation for at least 10,000 hours.Storage components are manufactured by type casting or extrusion using iron oxide based slurries or pastes. Because of long-term redox cycling at 800 °C, the structure of the Fe/FeO storage material degrades, making the material incapable of storing oxygen for continuous redox reactions. Hence, to prevent storage degradation, the Fe/FeO matrix was supplemented by “inert” (ZrO2, 8YSZ) as well as reactive oxides (Al2O3, CaO) which are capable of promoting and/or inhibiting ageing and the kinetics of redox reactions.Thermogravimetric, XRD, and microstructural analysis after redox cycling in the furnace (420 h) show that the “inert” oxides hinder to some extent structural degradation, whereas reactive mixed oxides are fully capable of preventing sintering for several redox cycles. The influence of the powder parameters on the thermochemical processes in the ROB were also revealed as significant characteristics.After all, as proof of concept the first prototypes of high-temperature rechargeable planar batteries were successfully operated with current densities of 150 mA/cm2 and full cycle durations (charge-discharge) of up to 100 minutes (200 cycles).
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|a Berger, C. M.
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700 1 _ |0 P:(DE-Juel1)161591
|a Guillon, O.
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773 _ _ |y 2015
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