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000841408 1001_ $$0P:(DE-Juel1)138081$$aLenser, Christian$$b0$$eCorresponding author
000841408 245__ $$aImpact of defect chemistry on cathode performance: A case study of Pr-doped ceria
000841408 260__ $$aAmsterdam [u.a.]$$bElsevier Science$$c2018
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000841408 520__ $$aPr-doped ceria (PCO) is a mixed ionic-electronic conductor (MIEC) under oxidizing conditions, with excellent ionic and relatively low electronic conductivity. Motivated by investigations of model systems, PCO is examined with regards to the performance as an SOFC air electrode. The conductivity of Pr0.2Ce0.8O2‐δ (20PCO) in air is examined in detail, and a novel technique based on high-temperature X-ray diffraction (HT-XRD) to identify the exact temperature at which half of all Pr-dopants are ionized is presented. The redox-state of the Pr dopants strongly influences the polaron mobility, which can be linked to an increase of the polarization resistance of symmetric cells with 20PCO electrodes, indicating a change of the rate-limiting step for the oxygen reduction reaction (ORR).
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000841408 7001_ $$0P:(DE-Juel1)130677$$aGunkel, Felix$$b1
000841408 7001_ $$0P:(DE-Juel1)159368$$aSohn, Yoo Jung$$b2
000841408 7001_ $$0P:(DE-Juel1)129636$$aMenzler, Norbert H.$$b3
000841408 773__ $$0PERI:(DE-600)1500750-9$$a10.1016/j.ssi.2017.09.023$$gVol. 314, p. 204 - 211$$p204 - 211$$tSolid state ionics$$v314$$x0167-2738$$y2018
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