物理化学学报 >> 2015, Vol. 31 >> Issue (1): 99-104.doi: 10.3866/PKU.WHXB201411053

电化学和新能源 上一篇    下一篇

阳极氧化/GCD新工艺法制备镍基超级电容器薄膜电极

易超, 熊信柏, 邹智标, 李俊杰, 黄拓, 李彬, 马俊, 曾燮榕   

  1. 深圳大学材料科学与工程学院, 深圳特种功能材料重点实验室, 广东 深圳 518060
  • 收稿日期:2014-09-29 修回日期:2014-11-04 发布日期:2014-12-25
  • 通讯作者: 熊信柏 E-mail:xxbszdx@szu.edu.cn
  • 基金资助:

    大学生创新训练项目(0000232321), 深圳大学教学改革项目(JG2012084),国家自然科学基金(51172147, 50702034)资助

Fabrication of Nickel-Based Composite Film Electrode for Supercapacitors by a New Method of Anodization/GCD

YI Chao, XIONG Xin-Bo, ZOU Zhi-Biao, LI Jun-Jie, HUANG Tuo, LI Bin, MA Jun, ZENG Xie-Rong   

  1. Shenzhen Key Laboratory of Special Functional Materials, Department of Materials Science and Engineering, Shenzhen University, Shenzhen 518060, Guangdong Province, P. R. China
  • Received:2014-09-29 Revised:2014-11-04 Published:2014-12-25
  • Contact: XIONG Xin-Bo E-mail:xxbszdx@szu.edu.cn
  • Supported by:

    The project was supported by the Students' Innovation Training Program, China (0000232321), Teaching ReformProjectof Shenzhen University (JG2012084), and National Natural Science Foundation of China (51172147, 50702034).

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摘要：

采用磷酸阳极氧化法在金属镍表面形成阳极氧化复合膜,在1 mol·L-1氢氧化钾溶液中进行大电流密度恒流充放电(GCD)处理, 使基体表面形成一层多孔纳米花瓣状膜. 采用扫描电镜(SEM), X射线光电子能谱(XPS), X射线衍射(XRD)仪, 对膜的形貌、组成和结构进行了表征, 使用电化学工作站、电池寿命测试仪对该膜的电容特性进行了测试. 结果表明, 所制氧化膜由三维多孔纳米花瓣状的NiO、α-Ni(OH)2和β-Ni(OH)2构成, 该膜具有优异的电容特性, 其在电流密度为6.7 A·g-1时,比电容量达1509 F·g-1, 而当电流密度为66.7 A·g-1时,比电容量为1120 F·g-1 (为6.7A·g-1时的74%).在电流密度为66.7 A·g-1时, 经过2000次循环测试后比电容量基本保持不变.

关键词: 超级电容器, 阳极氧化, 恒流充放电, 镍, 薄膜

Abstract:

Anickel-based composite filmwas fabricated on Ni foil, by two-electrode anodization and galvanostatic charge-discharge (GCD) treatment. The surface morphology, states of chemical species, and crystal structure of the filmwere characterized by scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and X-ray diffraction (XRD). The electrochemical performance was tested using an electrochemical workstation and battery program-control test system. The test results indicated that the filmpossessed a nanoflower-like morphology, and consisted of NiO, α-Ni(OH)2 and β-Ni(OH)2. The NiO-α-Ni(OH)2-β-Ni(OH)2 compounds exhibiting a high specific capacitance, superior rate capability, and good cyclability (1509 F·g-1 at 6.7A·g-1, 1120 F·g-1 at 66.7 A·g-1, after 2000 cycles, the capacitance of the filmremained unchanged).

Key words: Supercapacitor, Anodization, Galvanostatic charge-discharge, Nickel, Film