物理化学学报 >> 2015, Vol. 31 >> Issue (11): 2220-2228.doi: 10.3866/PKU.WHXB201510131

材料物理化学 上一篇    

碳包覆纳米SnO2中空纤维的制备及电容性能

韩笑梅1,吴艳波2,*(),赵恒彦2,毕军2,魏斌斌2   

  1. 1 大连交通大学材料科学与工程学院,辽宁大连116028
    2 大连交通大学环境与化学工程学院,辽宁大连116028
  • 收稿日期:2015-04-27 发布日期:2015-11-13
  • 通讯作者: 吴艳波 E-mail:wuyanbo_djd@126.com
  • 基金资助:
    国家自然科学基金(21076028);国家级大学生创新创业训练计划项目(201410150016)

Preparation and Supercapacitor Properties of Carbon-Coated SnO2 Hollow Fibers

Xiao-Mei. HAN1,Yan-Bo. WU2,*(),Heng-Yan. ZHAO2,Jun. BI2,Bin-Bin. WEI2   

  1. 1 College of Materials Science and Engineering, Dalian Jiaotong University, Dalian 116028, Liaoning Province, P. R. China
    2 College of Environmental and Chemical Engineering, Dalian Jiaotong University, Dalian 116028, Liaoning Province, P. R. China
  • Received:2015-04-27 Published:2015-11-13
  • Contact: Yan-Bo. WU E-mail:wuyanbo_djd@126.com
  • Supported by:
    the National Natural Science Foundation of China(21076028);National Training Programs of lnnovation andEntreprenurship for Undergraduates, China(201410150016)

摘要:

采用同轴静电纺丝法制备了碳包覆纳米SnO2中空纤维超级电容器电极材料.利用X射线衍射(XRD)、拉曼光谱、扫描电子显微镜(SEM)、透射电子显微镜(TEM)和比表面积分析仪(BET)对材料进行表征.结果表明,纤维呈现中空形貌,平均直径为1 μm; SnO2颗粒均匀分布于碳壳结构中,平均粒径为3-15 nm.材料的比表面积为565 m2·g-1.在三电极体系中,当电流密度为0.25 A·g-1时,电极材料的比容量达397.5 F·g-1;在1.0A·g-1电流密度下,充放电循环3000次后比容量仍保持为初始值的88%.在对称型双电极体系中,电流密度为0.25 A·g-1时,电极材料的比容量达162.0 F·g-1,在1.0 A·g-1电流密度下,充放电循环3000次后比容量仍保持为初始值的84%.

关键词: 同轴静电纺丝, 碳包覆纳米SnO2, 中空结构, 超级电容器

Abstract:

A new carbon-coated SnO2 hollow fiber was successfully prepared by coaxial electrospinning, and its supercapacitor properties were well studied. The surface morphology and structure were examined using X-ray diffraction (XRD), Raman spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM), and the Brunauer-Emmett-Teller (BET) method. The results showed hollow fibers of average diameter 1 μm and carbon-coated SnO2 particles of average size 3-15 nm uniformly distributed on the fiber shell. The surface area was 565 m2·g-1. In a three-electrode system, the electrode achieved a respectable specific capacitance of 397.5 F·g-1 at 0.25 A·g-1, and the capacitance retained ratio was still 88% of the initial value after 3000 cycles at 1.0 A·g-1. In the case of a symmetrical two-electrode system, the electrode achieved a specific capacitance of 162.0 F·g-1 at 0.25 A·g-1 current density, and the capacitance retained ratio was 84% of the initial value after 3000 cycles at 1.0 A·g-1.

Key words: Coaxial electrospinning, Carbon-coated nano-SnO2, Hollow structure, Supercapacitor

MSC2000: 

  • O646