Sodium-Titanate as Negative Electrode Material for Sodium-Ion Batteries

This paper describes our initial work focused on sodium-titanate electrode material. The sodium-titanate material analogy to lithium-titanate or lithium metatitanate (Li2TiO3) can be used in rechargeable aprotic battery systems. A sodium-ion system seems to be promising substituent for lithium-ion systems, at present the energy storage application as stationary energy storage systems (in range of MWh) through batteries for propulsion of electric vehicles become more important than ever. The main advantage of sodium-ion system is the price and sodium abundance in earth's crust. A challenge for the sodium systems is identification of a suitable negative electrode material (anode) because sodium atom is too big for intercalation into graphite. Our experiments deal with synthetization process of NaxTiyOz in SOL form, followed by its transformation to fibres form.