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Journal of Electrochemistry ›› 2014, Vol. 20 ›› Issue (5): 486-492.doi: 10.13208/j.electrochem.131227

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Preparation and Electrochemical Behavior of PbO/GN/AC

GAO Yun-fang*, WANG Yan-ping, YAO Qiu-shi, WANG Fu-hua, REN Dong-lei, XU Xin   

  1. State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, College of Chemical Engineering and Materials Science, Zhejiang University of Technology, Hangzhou 310032, China
  • Received:2013-12-27 Revised:2014-04-22 Online:2014-10-28 Published:2014-04-27
  • Contact: GAO Yun-fang E-mail:gaoyf@zjut.edu.cn
  • Supported by:

    National Key Technology Research and Development Program of the Ministry of Science and Technology of China

Abstract: The lead oxide/graphene/activated carbon (PbO/GN/AC) composite materials were prepared by impregnating commercial activated carbon and graphene in saturated lead nitrate solution followed by calcination. The structures and morphologies of the composite were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). The results show that PbO crystals (about 200 nm) were dispersed uniformly on the surface of activated carbon and graphene. Electrochemical data indicate that the composite exhibited good electrochemical performances. The PbO/GN/AC composite possessed the higher over-potential of hydrogen evolution and the high specific capacitance of 312.6 F·g-1, while the internal resistance was 1.56 Ω. The composite electrode also displayed excellent cycling stability, retaining over 92.6% of its initial charge after 6000 cycles. The ultra-battery with 5% (by mass) PbO/GN/AC being added to the negative paste had a cycle life approximately 3.5 times longer than conventional lead-acid batteries.

Key words: activated carbon, PbO, graphene, hydrogen evolution, supercapacitor

CLC Number: