The authors show how hydration of (Ba,Sr)LnCo2O6-δ double perovskite positrodes for proton ceramic cells is coupled to Ln basicity, A-site disorder, and Co oxidation state and is promoted by a closed or half-closed Ln 4 f shell, i.e., Ln = La, Gd, Lu.
- Ragnar Strandbakke
- Sebastian Lech Wachowski
- Truls Norby