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A facile approach to the preparation of loose-packed Ni(OH)2 nanoflake materials for electrochemical capacitors

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Abstract

Loose-packed nickel hydroxides were successfully synthesized by a facile chemical precipitation method. Structure characterizations indicate that a nanoflake structure with low crystallinity for the nickel hydroxide samples was obtained. Electrochemical studies were carried out using cyclic voltammetry, chronopotentiometry technology, and alternating current impedance spectroscopy, respectively. A maximum specific capacitance of 2,055F/g could be achieved in 2M aqueous KOH with the potential range of 0 to 0.4V (vs. the saturated calomel electrode) in a half-cell setup configuration for the nanoflake Ni(OH)2 electrode, suggesting its potential application in the electrode material for electrochemical capacitors. Furthermore, the effect of annealing temperatures on the electrochemical capacitance characteristics has also been systemically explored.

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Acknowledgment

The authors acknowledge the financial support by the National Natural Science Foundation of China (no. 50602020) and the National Basic Research Program of China (no. 2007CB216408).

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Authors and Affiliations

  1. State Key Laboratory of Gansu Advanced Non-ferrous Metal Materials, Lanzhou University of Technology, Lanzhou, 730050, People’s Republic of China

    Jun-Wei Lang, Ling-Bin Kong, Wei-Jin Wu, Min Liu, Yong-Chun Luo & Long Kang

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  1. Jun-Wei Lang
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  2. Ling-Bin Kong
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  3. Wei-Jin Wu
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  4. Min Liu
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  5. Yong-Chun Luo
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  6. Long Kang
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Correspondence to Ling-Bin Kong.

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Lang, JW., Kong, LB., Wu, WJ. et al. A facile approach to the preparation of loose-packed Ni(OH)2 nanoflake materials for electrochemical capacitors. J Solid State Electrochem 13, 333–340 (2009). https://doi.org/10.1007/s10008-008-0560-0

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  • DOI: https://doi.org/10.1007/s10008-008-0560-0

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