1. MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, Heilongjiang 150001, China
2. School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore
3. Materials Science and Engineering Program and Walker Department of Mechanical Engineering, Texas Materials Institute, The University of Texas at Austin, Austin, Texas 78712, United States
4. National Synchrotron Radiation Laboratory, CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei, Anhui 230029, China
5. Department of Physics, National University of Singapore, Singapore 117542, Singapore
6. Institute of Materials Research and Engineering, A*STAR, 2 Fusionopolis Way, Innovis, #08-03, Singapore 138634, Singapore