Electrochem Seminar - Developing high-capacity, low-voltage titanate anode materials for sodium-ion batteries
The identification and development of suitable anode materials remain a great challenge for Na-ion batteries. For reasons of low cost and high specific capacities, hard carbons are the most widely used Na-ion battery anode. However, Na+ inserts into hard carbons at low potentials that are only slightly above the sodium plating potentials, which raises safety concerns. With relatively higher Na+ intercalation voltages, sodium titanates are attractive alternatives. The structural/compositional diversity of this group of materials also offers an opportunity to tailor their electrochemical properties depending on the target usages. This talk will introduce a new non-stoichiometric lepidocrocite-structured sodium titanate (NaxTi2-x/4□x/4O4) with potential application as Na-ion battery anode. Various factors that affect the Na+ storage capacity and reversibility will also be discussed.