电沉积法制备V_2O_5薄膜及其储钠性能研究  

The Sodium Storage Performance of V_2O_5 Films Prepared by Electrodeposition

作　　者：李延伟[1,2] 李世玉[1] 潘观林 姚金环[1] 张灵志[2] 

机构地区：[1]广西电磁化学功能物质重点实验室桂林理工大学化学与生物工程学院,广西桂林541004 [2]中国科学院可再生能源重点实验室,广东广州510640

出　　处：《电镀与精饰》2015年第8期1-6,共6页Plating & Finishing

基　　金：国家自然科学基金(No.51204061;No.21263003);广西自然科学基金(2012GXNSFAA053026;2014GXNSFBA118238);中国科学院可再生能源重点实验室开放基金(No.y507k61001)资助

摘　　要：采用电沉积法制备了V2O5薄膜并研究了电沉积温度、时间、电压和镀液浓度对V2O5薄膜储钠性能的影响。采用场发射扫描电镜和X-射线衍射表征了V2O5薄膜表面形貌和晶体结构;利用循环伏安、充放电测试V2O5薄膜的储钠性能。结果表明,制备的V2O5薄膜是非晶相V2O5水合物,该薄膜具有片状的叠层纳米结构;电沉积条件对V2O5薄膜沉积速度和储钠性能都有显著影响,随着电沉积温度的升高和镀液浓度的增加,薄膜的沉积速度加快;随着电沉积电压的增加,薄膜沉积速度先增加后降低,在电压为2.5 V时沉积速度最大;随着电沉积时间的增加,薄膜厚度增大;薄膜的储钠性能与薄膜厚度密切相关,薄膜过薄或过厚都不利于其储钠性能的提高。V2O5 thin films were fabricated by electrodeposition method. The influences of electrodeposition temperature, time, voltage, and concentration of electrolyte on the sodium storage performance of V2O5 thin films were systematically investigated. The surface morphology and microstructure of V2O5 thin films were characterized by field emission scanning electron microscopy （FESEM） and X-ray diffraction （XRD） techniques. The sodium storage performance of V2O5 thin films was studied by cyclic voltammetry （CV） and charge-discharge test. The results demonstrate that the V2O5 thin films are amorphous V2O5· nH2O and consist of nano-lamellae stacks structure. The electrodeposition conditions have significant impacts the deposition speed and sodium storage performance of V2O5 thin films. With increasing the electrodeposition temperature and concentration of electrolyte, the deposition speed of V2O5 thin films increases. The deposition speed increases with the increasing of voltage and reaches the maximum at about 2.5 V. The electrodeposition speed decreases slightly with further increasing the voltage. With the increasing of electro-deposition time, the thickness of V2O5 thin films increases. The sodium storage performance of Vz 05 thin films is closely related to the thickness. A proper thickness of the films needed to improve the sodium storage performance.

关 键 词：溶胶-凝胶法 电沉积 V2O5 薄膜 储钠性能 

分 类 号：TB43[一般工业技术] TQ153.19[化学工程—电化学工业]