V_2O_5干凝胶薄膜电极的储钠性能  

Investigation on the preparation and sodium storage performance of V_2O_5 xerogel film electrode

作　　者：李延伟[1,2,3] 李世玉[2,3] 谢志平 姚金环[2,3] 姜吉琼[2,3] 张灵志[1,2,3] LI Yan-wei;LI Shi-yu;XIE Zhi-ping;YAO Jin-huan;JIANG Ji-qiong;ZHANG Ling-zhi(Key Laboratory of Renewable Energy,Chinese Academy of Sciences,Guangzhou 510640,China;a.Guangxi Key Laboratory of Electrochemical and Magnetochemical Functional Materials;b.College of Chemistry and Bioengineering,Guilin University of Technology,Guilin 541004,Chin)

机构地区：[1]中国科学院可再生能源重点实验室,广州510640 [2]桂林理工大学广西电磁化学功能物质重点实验室,广西桂林541004 [3]桂林理工大学化学与生物工程学院,广西桂林541004

出　　处：《桂林理工大学学报》2018年第2期306-311,共6页Journal of Guilin University of Technology

基　　金：国家自然科学基金项目(51204061;51464009);广西自然科学基金项目(2015GXNSFGA139006;2017GXNSFAA198117);广西教育厅基金项目(YB2014153);中国科学院可再生能源重点实验室项目(y507k61001)

摘　　要：以V_2O_5溶胶为电解液,采用电沉积法在不锈钢基体上制备了V_2O_5薄膜。采用场发射扫描电子显微镜(FESEM)和X射线衍射(XRD)分析了薄膜的表面形貌和晶体结构;用循环伏安(CV)、电化学交流阻抗(EIS)和充放电测试研究了该薄膜作为钠离子电池正极材料的储钠性能。结果表明,该薄膜是具有片状纳米结构的V_2O_5干凝胶薄膜;作为钠离子电池正极,该薄膜表现出很好的储钠活性、优异的循环稳定性和高Na+扩散能力,是一种非常有应用前景的钠离子电池正极材料。V_2O_5 thin films were prepared on stainless steel substrate by electrodeposition method with V_2O_5 sol as electrolyte. The surface morphology and and crystal structure of the prepared thin films were analyzed by field emission scanning electron microscopy and X-ray diffraction. The sodium storage performance of the thin film electrode was characterized by cycle voltammetry,electrochemical impedance spectroscopy and charge-discharge tests. The results demonstrated that the prepared film is V_2O_5 xerogel consisting of stacked nanoplates. When used as cathode for sodium ion batteries,this V_2O_5 xerogel thin film exhibited high sodium storage activity,excellent cycling stability,and good Na＋diffusion property,indicating that it is a very promising cathode materials for sodium-ion batteries.

关 键 词：钠离子电池 正极材料 V2O5干凝胶 储钠性能 电沉积 

分 类 号：TM912.9[电气工程—电力电子与电力传动]