1. Energy and Resources Group, University of California, Berkeley, California 94720-3050, Department of Chemistry, University of California, Berkeley, California 94720, Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, Department of Materials Science and Engineering, University of California, Berkeley, California 94720, Goldman School of Public Policy, University of California, Berkeley, California 94720-3050, and Renewable and Appropriate Energy Laboratory,...