1. Physical Sciences and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia
2. Department of Materials, Imperial College London, London SW7 2AZ, United Kingdom
3. Energy Research Institute at Nanyang Technological University (ERI@N), Research Technoplaza, Nanyang Technological University, 50 Nanyang Drive, Singapore 637553
4. Stanford Synchrotron Radiation Light source (SLAC), National Accelerator Laboratory, Menlo Park, California 94025, USA