1. Electrochemistry Laboratory, Paul Scherrer Institute, Forschungsstrasse 111, Villigen PSI CH-5232, Switzerland
2. Laboratory for High Performance Ceramics, Empa - Swiss Federal Laboratories for Materials Science and Technology, Dübendorf CH-8600, Switzerland
3. Photon Science Division, Paul Scherrer Institute, Forschungsstrasse 111, Villigen PSI CH-5232, Switzerland
4. Institute of Molecular Physical Science, ETH Zurich, Zürich CH-8093, Switzerland