1. Centre for Materials Science and Nanotechnology, Department of Chemistry, University of Oslo, P.O. Box 1033, Blindern, Oslo 0315, Norway
2. Department of Battery Technology, Institute for Energy Technology, Instituttveien 18, Kjeller 2007, Norway
3. FAAM, Strada Statale Via Appia 7 bis, Teverola, Caserta 81030, Italy