Chem. J. Chinese Universities ›› 2010, Vol. 31 ›› Issue (2): 353.

• Articles • Previous Articles     Next Articles

Preparation and Electrochemical Capacitance of α-Co(OH)2 for Supercapacitors

XIE Li-Jing, JIN Xiao-Qing, FU Guo-Rui, XIE Yu-Long, WANG Yao-Xian, HU Zhong-Ai*   

  1. Key Laboratory of Eco-Environment-Related Polymer Materials, Ministry of Education, Key Laboratory of Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China
  • Received:2009-05-08 Online:2010-02-10 Published:2010-02-10
  • Contact: HU Zhong-Ai. E-mail: zhongai@nwnu.edu.cn
  • Supported by:

    国家自然科学基金(批准号: 20963009)和甘肃省自然科学基金(批准号: 0803RJ2A005)资助.

Abstract:

The sheet-like α-Co(OH)2 composed of the uniform nanoparticles was successfully prepared using cobalt chloride as the raw material and polyvinyl pyrrolidone as the dispersant by chemical precipitation method. The components of products were analyzed by FTIR and the structure and morphology were characterized by X-ray diffraction(XRD) and field emission scanning electron microscopy(FESEM), respectively. The electrochemical performances were investigated by cyclic voltammetry and constant current charge/discharge techniques. The test results show that an extraordinary high specific capacitance value of 1220 F/g is achieved, and the α-Co(OH)2 is a promising electrode material for supercapacitor.

Key words: α-Co(OH)2; Polyvinyl pyrrolidone; Chemical precipitation

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