This title appears in the Scientific Report : 2016 

Calcium-Iron Oxide as Energy Storage Medium in Rechargeable Oxide Batteries
Berger, Cornelius (Corresponding author)
Mahmoud, Abdelfattah / Hermann, Raphael / Braun, Waldemar / Yazhenskikh, Elena / Sohn, Yoo Jung / Menzler, Norbert H. / Guillon, Olivier / Bram, Martin
Streumethoden; PGI-4
Werkstoffstruktur und -eigenschaften; IEK-2
Streumethoden; JCNS-2
Werkstoffsynthese und Herstellungsverfahren; IEK-1
JARA-FIT; JARA-FIT
JARA-ENERGY; JARA-ENERGY
Journal of the American Ceramic Society, 99 (2016) 12, S. 4083-4092
Oxford [u.a.] Wiley-Blackwell 2016
10.1111/jace.14439
Journal Article
Quantum Condensed Matter: Magnetism, Superconductivity
Controlling Collective States
Controlling Collective States
Solid Oxide Fuel Cell
Fuel Cells
Helmholtz Interdisciplinary Doctoral Training in Energy and Climate Research (HITEC)
Jülich Centre for Neutron Research (JCNS)
Materials and Processes for Energy and Transport Technologies
Please use the identifier: http://dx.doi.org/10.1111/jace.14439 in citations.
Rechargeable oxide batteries (ROB) comprise a regenerative solid oxide cell (rSOC) and a storage medium for oxygen ions. A sealed ROB avoids pumping loss, heat loss, and gas purity expenses in comparison with conventional rSOC. However, the iron oxide base storage medium degrades during charging–discharging cycles. In comparison, CaFe3O5 has improved cyclability and a high reversible oxygen storage capacity of 22.3 mol%. In this study, we analyzed the redox mechanism of this compound. After a solid-state synthesis of CaFe3O5, we verified the phase composition and studied the redox reaction by means of X-ray diffraction, Mössbauer spectrometry, and scanning electron microscopy. Results show a great potential to operate the battery with this storage material during multiple charging–discharging cycles.