Mixed ionic electronic conductors (MIEC) are pivotal materials in a number of
electrochemical devices that are relevant for clean energy technologies and industrial …

The authors review the use of in situ optical absorption to probe point defect equilibria and
kinetics in oxides, with particular attention to thin films and high‐temperature measurements …

Mixed‐conducting perovskites are workhorse electrochemically active materials, but typical
high‐temperature processing compromises their catalytic activity and chemo‐mechanical …

The development of high‐performance electrochemical energy storage and conversion
technologies hinges largely on the creation of highly efficient and durable electrode …

Enabling light-controlled ionic devices requires insight into photoionic responses in
technologically relevant materials. Mixed-conducting perovskites containing nondilute Fe─ …

We compare approaches to measure oxygen surface exchange kinetics, by simultaneous
optical transmission relaxation (OTR) and AC-impedance spectroscopy (AC-IS), on the …

Understanding and rationally tailoring defect-mediated optical absorption of nondilute oxide
solid solutions represents a complex challenge. In this work, we investigate compositions in …

The oxygen surface exchange coefficient (k) dictates the efficiency and response time of
many mixed conductors, so its accurate, continuous measurement in realistic conditions …

Solid-state heterointerfaces are of interest for emergent local behavior that is distinct from
either bulk parent compound. One technologically relevant example is the case of mixed …

Abstract 18O2/16O2 exchange experiments on terminated (100),(110), and (111) oriented
samples of single‐crystal SrTiO3 are used to study the effect of surface orientation on the …