1. Battery Science Branch, DEVCOM Army Research Laboratory, Adelphi, Maryland 20783, USA
2. The Joint Center for Energy Storage Research (JCESR), Pacific Northwest National Laboratory, Richland, WA 99354, USA
3. Department of Physics & Astronomy, Hunter College of the City University of New York, New York, NY 10065, USA
4. The Joint Center for Energy Storage Research (JCESR), Sandia National Laboratories, Albuquerque, NM 87123, USA