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电化学 ›› 2015, Vol. 21 ›› Issue (2): 152-156.doi: 10.13208/j.electrochem.141044

• 化学电源及其材料近期研究专辑(客座编辑:复旦大学 夏永姚教授) • 上一篇    下一篇

碳纳米管/五氧化二钒空心球的制备及其电化学性能研究

郝亮,申来法,王婕,朱佳佳,赵笑晨,张校刚*   

  1. 南京航空航天大学 材料科学与技术学院,江苏省能量转换材料与技术重点实验室,江苏 南京 210016
  • 收稿日期:2014-10-31 修回日期:2014-12-22 出版日期:2015-04-28 发布日期:2015-01-05
  • 通讯作者: 张校刚 E-mail:azhangxg@163.com
  • 基金资助:

    国家自然科学基金项目(No. 21173120,No. 51372116)、国家重点基础研究发展计划(No. 2014CB239701)及江苏省自然科学基金项目(No. BK2011030)资助

Synthesis and Electrochemical Properties of CNTs/V2O5 Hollow Microspheres

HAO Liang, SHEN Lai-fa, WANG Jie, ZHU Jia-jia, ZHAO Xiao-chen, ZHANG Xiao-gang*   

  1. Jiangsu Key Laboratory of Materials and Technology for Energy Conversion, College of Material Science and Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
  • Received:2014-10-31 Revised:2014-12-22 Online:2015-04-28 Published:2015-01-05
  • Contact: ZHANG Xiao-gang E-mail:azhangxg@163.com

摘要: 采用溶剂热法制备了碳纳米管穿插的分级结构五氧化二钒空心球(VOCx). 使用XRD、SEM、循环伏安曲线和充放电曲线研究了不同碳纳米管量对产物结构、形貌和电化学性能的影响. 结果表明,碳纳米管的加入明显改善了VOC的倍率特性. 碳纳米管含量为7.1%时,0.5 A·g-1电流密度下,其比电容达到346 F·g-1,8 A·g-1电流密度时,其电容保持率可达75%. 与活性炭组装成混合电容器,在功率密度为700 W·kg-1时,能量密度达12.6 Wh·kg-1.

关键词: 溶剂热法, 五氧化二钒, 碳纳米管, 混合电容器

Abstract: The carbon nanotubes/vanadium oxides (CNTs/V2O5) hollow microspheres (VOC) were prepared via solvothermal process. The effects of the ratio for CNTs to V2O5 on the morphologies, structures and electrochemical performances were systemically investigated. The results indicate that CNTs dramatically enhanced the rate performances of VOC composite electrodes. When the ratio of CNTs is 7.1%, the VOC composite electrode exhibited the best electrochemical performance, which delivered a specific capacitance of 346 F·g-1 at 0.5 A·g-1 and maintained 75% at 8 A·g-1 in 5 mol L-1 LiNO3. A hybrid capacitor was assembly using commercial activated carbon as the negative electrode and VOC as the positive electrode. The hybrid capacitor exhibited an energy density of 12.6 Wh·kg-1 and power density of 700 W·kg-1.

Key words: solvothermal process, V2O5, CNTs, hybrid capacitor

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