1. Chemical Science Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, California 94720, United States
2. Department of Chemistry, University of California, Berkeley, California 94720, United States
3. Joint Center for Energy Storage Research (JCESR), 9700 South Cass Avenue, Argonne, Illinois 60439, United States
4. Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States
5. Department of Chemistry, RWTH Aachen University, Landoltweg 1, Aachen 52074, Germany