P-Type Electronic Conductivity, Oxygen Permeability and Stability of La2Ni0.9Co0.1O4+Δelectronic Supplementary Infromation (Esi) Available: Further Experimental Data for the Oxygen Permeability, Total Conductivity and Seebeck Coefficient of La2Ni0.9Co0.1O4+Δ. See Http://Www.rsc.org/Suppdata/Jm/B3/B300357D/