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化学学报
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化学学报 ›› 2005, Vol. 63 ›› Issue (19): 1775-1781.    下一篇

研究论文

介孔氧化镍的合成、表征和在电化学电容器中的应用

邢伟1，李丽2，阎子峰*,2 LU, Gao-Qing3   

  1. (1山东理工大学化学工程学院 淄博 255049)
    (2中国石油大学重质油加工国家重点实验室 中油集团催化重点实验室 东营 257061)
    (3 The Nanomaterials Centre, School of Engineering, University of Queensland, Brisbane 4072, Australia)
  • 投稿日期:2005-03-09 修回日期:2005-06-14 发布日期:2010-12-10
  • 通讯作者: 阎子峰

Synthesis and Characterization of Mesoporous Nickel Oxide and Its Application to Electrochemical Capacitor

XING Wei1, LI Li2, YAN Zi-Feng*,2, LU Gao-Qing3   

  1. (1 School of Chemical Engineering, Shandong University of Technology, Zibo 255049, China)
    (2 State Key Laboratory for Heavy Oil Processing, Key Laboratory of Catalysis, China National Petroleum Corporation,University of Petroleum, Dongying 257061, China)
    (3 The Nanomaterials Centre, School of Engineering, Uni-versity of Queensland, Brisbane 4072, Australia)
  • Received:2005-03-09 Revised:2005-06-14 Published:2010-12-10
  • Contact: YAN Zi-Feng

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被引次数

52 | 11

以十二烷基硫酸钠为模板剂, 采用尿素为沉淀剂, 用均匀沉淀法, 适当控制尿素的水解速度, 制备具有介孔结构的氢氧化镍胶体, 在不同温度下焙烧处理得到孔分布集中的氧化镍介孔分子筛. 结果表明, 在523 K下焙烧得到的氧化镍BET比表面达到477.7 m2•g－1. 结构表征还显示, 介孔氧化镍的孔壁为多晶结构, 其孔结构形成机理应为准反胶束模板机理. 循环伏安法表明用NiO介孔分子筛制备的电极有很好的电容性能. 与浸渍法和阴极沉淀法制得的NiO相比, 这种介孔结构的NiO能够大量用来制作电化学电容器电极, 并且保持较高的比电容量和良好的电容性能.

关键词: 介孔, 氧化镍, 电化学电容器, 准电容

Mesoporous Ni(OH)2 was synthesized using cationic surfactant as template and urea as hydrolysis-controlling agent. Mesoporous NiO with centralized pore size distribution was obtained by calcining Ni(OH)2 at different temperatures. The BET specific surface area reaches 477.7 m2•g－1 for NiO calcined at 523 K. Structure characterizations indicate the polycrystalline pore wall of mesoporous nickel oxide. The pore-formation mechanism is also deduced to be quasi-reverse micelle mechanism. Cyclic voltammetry shows the good capacitive behavior of these NiO samples due to its unique mesoporous structure when using large amount of NiO to fabricate electrode. Com-pared with NiO prepared by dip-coating and cathodic precipitation methods, this mesoporous NiO with controlled pore structure can be used in much larger amount to fabricate the electrode and still maintains high specific capacitance and good capacitive behavior.

Key words: mesopore, nickel oxide, electrochemical capacitor, pseudocapacitance