The sodium vanadate (Na0.76V6O15) nanobelts have been successfully synthesized via a facile hydro thermal reaction followed by annealing. The ultra-long nanobelts have a length ranging from several micrometers to several dozens of micrometers. As cathode materials for lithium-ion batteries, the Na0.76V6O15 nanobelts exhibit high discharge capacity, excellent cyclic stability and good rate capability. High discharge capacity of 248 and 214 mA h g(-1) can be obtained at the current density of 300 and 500 mA g(-1), respectively. Meanwhile, it maintains a stable capacity of 113 mA h g(-1) after 200 cycles at a high current density of 2000 mA g(-1) with no capacity decay. The superior electrochemical performances may be attributed to the novel nanobelts structure and excellent structural stability of Na0.76V6O15. (C) 2016 Elsevier B.V. All rights reserved.