1. Shanghai Institute of Space Power-Sources, No. 2965 Dongchuan Road, Shanghai 200245, China
2. Department
of Chemistry, Dalhousie University, Halifax, Nova Scotia B3H4R2, Canada
3. National High Magnetic Field Laboratory, 1800 East Paul Dirac Drive, Tallahassee, Florida 32310, United States
4. Shanghai
Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, Chinese Academy of Science, Shanghai 201204, China