(湖南工程學院 化學化工學院，湘潭 411104)
摘 要: 以V2O5作為釩源，乙二醇作為結構導向劑和還原劑，在不使用模板的情況下，通過水熱法制備VO2(B)納米帶陣列結構。利用X射線衍射儀(XRD)、掃描電子顯微鏡(SEM)和透射電子顯微鏡(TEM)對合成產物的晶體結構和形貌進行表征，研究乙二醇的含量和水熱反應時間對產物結構和形貌的影響。作為鈉離子電池正極材料，研究水熱反應時間和充放電電壓范圍對VO2(B)電化學性能的影響。結果表明：當乙二醇含量為10 mL時，在180 ℃水熱反應6 h所合成的VO2(B)納米帶陣列在1.5~4 V的電壓范圍內具有更好的電化學性能。
關鍵字: 鈉離子電池；正極材料；VO2(B)；納米帶陣列；水熱法
（School of Chemistry and Chemical Engineering, Hunan Institute of Engineering, Xiangtan 411104, China）
Abstract:VO2(B) nanobelt arrays were synthesized by hydrothermal method with V2O5 as vanadium source and ethylene glycol as structure-directing agent and reductant, without using template. The crystal structure and morphology of synthesized VO2(B) were characterized by X-ray diffractometry (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The influences of ethylene glycol content and reaction time on structure and morphology of synthesized product were studied. As cathode materials for sodium-ion batteries, the effects of reaction time and charge-discharge voltage range on the electrochemical performance of synthesized VO2(B) were further researched. The results show that VO2(B) nanobelt arrays synthesized at 180 ℃ for 6 h using 10 mL ethylene glycol have better electrochemical performance in the voltage range of 1.5-4 V.
Key words: sodium-ion battery; cathode material; VO2(B); nanobelt array; hydrothermal method
