1. National Center for Electron Microscopy, Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.
2. Department of Materials Science and Engineering, University of California at Berkeley, Berkeley, CA 94720, USA.
3. Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.
4. Department of Mechanical Engineering, Rochester Institute of Technology, Rochester, NY 14623, USA.
5. Energy Storage and Distributed Resources Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.