1. Department of Advanced Materials for Energy Applications, IREC, Catalonia Institute for Energy Research, Jardins de les Dones de Negre 1, Planta 2, 08930 Sant Adrià del Besòs, Barcelona, Spain
2. Department of Chemistry and Industrial Chemistry, Università degli Studi di Genova, Via Dodecaneso, 31, 16146 Genova, Italy
3. SOLIDpower SpA, Viale Trento 117, 38017 Mezzolombardo, Italy
4. ICREA, Passeig Lluís Companys 23, 08010 Barcelona, Catalonia, Spain