1. Institute of High Temperature Electrochemistry, 22, S. Kovalevskaya Str., 620219 Ekaterinburg, Russia
2. Institute of Inorganic Chemistry and Metallurgy of Rare Elements, Wrocław University of Technology, Wybrzeze Wyspianskiego 27, 50-370 Wrocław, Poland
3. École Polytechnique, Département Mécanique Energétique, IUSTI-CNRS UMR 7343, Technopôle de Château Gombert, 5 rue Enrico Fermi, F-13453 Marseille Cedex 13, France