1. Department of Applied Physics, KTH Royal Institute of Technology, SE-10691 Stockholm, Sweden
2. Department of Energy and Environment, Research Institute of Electrochemical Energy (RIECEN), National Institute of Advanced Industrial Science and Technology (AIST), Ikeda, Osaka 563-8577, Japan
3. AIST-Kyoto University Chemical Energy Materials Open Innovation Laboratory (ChEM-OIL), National Institute of Advanced Industrial Science and Technology (AIST), Sakyo-ku, Kyoto 606-8501, Japan
4. Institut Laue-Langevin, 71 Avenue des Martyrs, 38042 Cedex 9 Grenoble, France
5. Laboratory for Muon Spin Spectroscopy, Paul Scherrer Institute, CH-5232 Villigen, PSI, Switzerland
6. Faculty of Physics, Babes-Bolyai University, 400084 Cluj-Napoca, Romania
7. Comprehensive Research Organization for Science and Society (CROSS), Tokai, Ibaraki 319-1106, Japan
8. Department of Physics, Chalmers University of Technology, SE-41296 Gothenburg, Sweden