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In this work, we demonstrate an effective method to improve capacitive performance of NaV_6O_(15) intrinsically by annealing. NaV_6O_(15) nanorods(NRs) prepared by a simple annealing treatment exhibit significantly improved electrochemical performance compared with the untreated NaV_6O_(15) electrode, and yield a high specific capacitance(402.8 F/g at 300 mA/g). Furthermore, the annealing treated nanorods show excellent rate capability and cycling stability(ca. 80% capacitance retention after 1000 cycles at a scan rate of100 mV/s). Our results have confirmed that the annealing treatment has great influence on the capacitive performance of NaV_6O_(15), which may be attributed to the intrinsic three dimensional(3D) tunneled structures of NaV_6O_(15), and NR morphology. These findings may further broaden the application of NaV_6O_(15)-based materials for high performance supercapacitors(SCs), aqueous rechargeable lithium batteries and Li-ion capacitors.
NaV_6O_ (15) nanorods (NRs) prepared by a simple annealing treatment exhibit significantly improved electrochemical performance compared with the untreated NaV_6O_ (15) electrode , and yield a high specific capacitance (402.8 F / g at 300 mA / g). Furthermore, the annealed nanorods show excellent rate capability and cycling stability (ca. 80% capacitance retention after 1000 cycles at a scan rate of 100 mV / s Our results have confirmed that the annealing treatment has great influence on the capacitive performance of NaV_6O_ (15), which may be attributed to the intrinsic three dimensional (3D) tunneled structures of NaV_6O_ (15), and NR morphology. further broaden the application of NaV_6O_ (15) -based materials for high performance supercapacitors (SCs), aqueous rechargeable lithium batteries and Li-ion capacitors.