NaV3O8 Nanoplates as a Lithium-Ion-Battery Cathode with Superior Rate Capability and Cycle Stability

NaV3O8 nanoplates with a thickness of approximately 50-200 nm, a length of 1-3 mu m, and a width of 0.2-1 mu m have been fabricated by using an in situ template method. When used as a cathode material for Li-ion batteries (LIBs), the as-synthesized NaV3O8 nanoplates delivered a high reversible capacity of 230 mAhg(-1), with a capacity retention of 93.4% for up to 200 cycles. Furthermore, about 50% of its regular capacity can be retained even at a high current density of 6.4 Ag-1 (ca. 21.3 C). The superior electrochemical performances are attributed to the fast lithium-ion diffusion kinetics and good structural stability. The excellent Li-storage properties, including high capacity, superior high-rate performance, and long cycle life, demonstrate that NaV3O8 nanoplates can serve as a potential candidate for the cathode materials of Li-ion batteries.