1. Laboratory of Materials for Renewable Energy, Institute of Chemical Sciences and Engineering, Basic Science Faculty (SB), École Polytechnique Fédérale de Lausanne (EPFL), 1951 Sion, Switzerland
2. Swiss Federal Laboratories for Materials Science and Technology (EMPA), 8600 Dübendorf, Switzerland
3. Group of Energy Materials (GEM), Institute of Mechanical Engineering (IGM), School of Engineering (STI), École Polytechnique Fédérale de Lausanne (EPFL), 1951 Sion, Switzerland