1. Key Laboratory of Optoelectronic Chemical Materials and Devices(Ministry of Education), School of Physics and Information Engineering, Jianghan University, Wuhan 430056, China;
2. Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, China
Abstract：A hydrothermal method was employed to synthetise NaV6O15 nanobelts, then nanobelts were annealed in air, the nanorods (NRs) were obtained at 350℃, which possess a length and diameter of 500nm and 100nm, respectively. NaV6O15 NRs as the electrode of supercapacitor exhibit significantly improved electrochemical performance compared with the untreated NaV6O15 electrode, and yield a high specific capacitance (402.8F/g at 300mA/g). Furthermore, the annealing treated nanorods show excellent cycling stability (80% capacitance retention after 1000 cycles at a scan rate of 100mV/s), this can be ascribed to that annealing turns the amorphous NaV6O15 into crystalline. These findings may further broaden the application of NaV6O15-based materials for high performance supercapacitors (SCs), aqueous rechargeable lithium batteries and Li-ion capacitors.
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2019, Vol. 47 
