物理化学学报 >> 2013, Vol. 29 >> Issue (07): 1501-1506.doi: 10.3866/PKU.WHXB201304241

电化学和新能源 上一篇    下一篇

钴酸镍纳米花/活性炭纤维复合物的制备和表征及其超级电容器性能

吴红英, 王欢文   

  1. 西北师范大学 化学化工学院 兰州 730070
  • 收稿日期:2012-12-24 修回日期:2013-04-22 发布日期:2013-06-14
  • 通讯作者: 吴红英 E-mail:hongying8860@163.com
  • 基金资助:

    国家自然科学基金(20963009, 21163017)和甘肃省自然科学基金(0803RJA005)资助项目

Synthesis and Characterization of NiCo2O4 Nanoflower/Activated Carbon Fiber Composite and Its Supercapacitor Properties

WU Hong-Ying, WANG Huan-Wen   

  1. College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, P. R. China
  • Received:2012-12-24 Revised:2013-04-22 Published:2013-06-14
  • Contact: WU Hong-Ying E-mail:hongying8860@163.com
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (20963009, 21163017) and Natural Science Foundation of Gansu Province, China (0803RJA005).

摘要:

利用简单的水热法以及后续热处理, 将钴酸镍纳米花成功生长在活性炭纤维支架上. 场发射扫描电镜(FESEM)及透射电镜(TEM)结果表明, 纳米花是由纳米针自组装而成, 而纳米针呈多孔结构. 这种三维复合多级结构非常有利于电解质离子的渗透和电子的传输. 将该多孔钴酸镍纳米花/活性炭纤维布作为工作电极, 表现出优良的电容性能. 在1 A·g-1时, 比电容高达1626 F·g-1; 在10 A·g-1时, 电容保持率为65%, 具有超高的电容值和优异的倍率特性.

关键词: 钴酸镍, 纳米花, 水热法, 超级电容器, 电极材料

Abstract:

In the present work, NiCo2O4 nanowires grown directly on carbon fibers self-organize into a nanoflower morphology. The materials are prepared by hydrothermal treatment and subsequent low-temperature annealing. Field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM) results reveal a hierarchical three-dimensional mesoporous structure, which facilitates ion transport and electronic conduction for fast redox reactions. As a result, the electrode achieves a respectable specific capacitance of 1626 F·g-1 at 1 A·g-1 and high rate capability (65% retention at 10 A·g-1), so it shows promise for application in supercapacitors.

Key words: NiCo2O4, Nanoflower, Hydrothermal treatment, Supercapacitor, Electrode material

MSC2000: 

  • O646