1. State Key Laboratory of Automotive Simulation and Control School of Materials Science and Engineering Key Laboratory of Automobile Materials of MOE Jilin University Changchun 130012 China
2. Key Laboratory for Renewable Energy Beijing Key Laboratory for New Energy Materials and Devices Laboratory of Advanced Materials and Electron Microscopy Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing 100190 China
3. Beijing Synchrotron Radiation Facility Institute of High Energy Physics Chinese Academy of Sciences Beijing 100049 China
4. Department of Physics and Astronomy and Department of Chemistry University of Missouri Columbia MO 65211–7010 USA