Controlled Synthesis of NaV6O15 Nanorods with High Reversible Capacity and Excellent Cycling Stability
来源期刊：JOURNAL OF MATERIALS SCIENCE TECHNOLOG2017年第3期
论文作者：Taotao Ding Juan Xu Cheng Chen Zhongwei Luo Jiangnan Dai Yu Tian Changqing Chen
文章页码：271 - 275
摘 要：In this work, we demonstrate an effective method to improve capacitive performance of NaV6O15 intrinsically by annealing. NaV6O15 nanorods（NRs） prepared by a simple annealing treatment exhibit significantly improved electrochemical performance compared with the untreated NaV6O15 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 NaV6O15, which may be attributed to the intrinsic three dimensional（3D） tunneled structures of NaV6O15, and NR morphology. These findings may further broaden the application of NaV6O15-based materials for high performance supercapacitors（SCs）, aqueous rechargeable lithium batteries and Li-ion capacitors.
Taotao Ding1，Juan Xu1，Cheng Chen1，Zhongwei Luo1，Jiangnan Dai1，Yu Tian2，Changqing Chen1
1. Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology2. School of Physics and Information Engineering, Jianghan University
摘 要：In this work, we demonstrate an effective method to improve capacitive performance of NaV6O15 intrinsically by annealing. NaV6O15 nanorods（NRs） prepared by a simple annealing treatment exhibit significantly improved electrochemical performance compared with the untreated NaV6O15 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 NaV6O15, which may be attributed to the intrinsic three dimensional（3D） tunneled structures of NaV6O15, and NR morphology. 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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