Effect of reaction time on the preparation of VO2(B) nanobattery materials by hydrothermal method
DUAN Chun-yan1，HAN Hui-li2，MA Ma3
1Electronic Information Department, Foshan Polytechnic, Foshan 528131,China，2Sun Yat-Sen University, Institute for Solar Energy Systems, Guangdong Provincial Key Laboratory of Photovoltaic Technology, Guangzhou 510006,China，3Shanxi general battery research institute co. LTD.,Taiyuan 030024,China
Abstract：The VO2(B) nanostrip structure was prepared by water heat treatment method. The microscopic morphology of VO2(B) nanostrip and the electrochemical properties of VO2(B) nanostrip were tested when the material was used as a sodium ion anode material. The results show that high purity VO2(B) has been generated when the hydrothermal time is 2 h. With the increasing of hydrothermal time to 10 h, the crystallinity of product does not change. The products obtained from water heat treatment are composed of nanoribbons structure. With the water heat treatment for 6 h, it generates numerous nanoribbons (with the thickness 10 nm, width 40 nm, length 2 μm). The discharge law decreases monotonically with the increase of cycle number. The discharge capacity of VO2(B) within 1.5-4.5 V is 175 mA·h/g. After 60 cycles of charging and discharging, the discharge capacity remains about 50% of the original.
2020, Vol. 30 
