Supercapacitors Using Single-Walled Carbon Nanotube Electrodes

Authors

  • K. H. An,

    1. Department of Semiconductor Science and Technology, Department of Physics and Semiconductor Physics Research Center, Jeonbuk National University, Jeonju 561–756 (Republic of Korea)
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  • W. S. Kim,

    1. Department of Semiconductor Science and Technology, Department of Physics and Semiconductor Physics Research Center, Jeonbuk National University, Jeonju 561–756 (Republic of Korea)
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  • Y. S. Park,

    1. Department of Semiconductor Science and Technology, Department of Physics and Semiconductor Physics Research Center, Jeonbuk National University, Jeonju 561–756 (Republic of Korea)
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  • Y. C. Choi,

    1. Department of Semiconductor Science and Technology, Department of Physics and Semiconductor Physics Research Center, Jeonbuk National University, Jeonju 561–756 (Republic of Korea)
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  • S. M. Lee,

    1. Department of Semiconductor Science and Technology, Department of Physics and Semiconductor Physics Research Center, Jeonbuk National University, Jeonju 561–756 (Republic of Korea)
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  • D. C. Chung,

    1. Division of Information, Communication, and Computer Engineering, Woosuk University, Wanju 561–701 (Republic of Korea)
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  • D. J. Bae,

    1. Department of Semiconductor Science and Technology, Department of Physics and Semiconductor Physics Research Center, Jeonbuk National University, Jeonju 561–756 (Republic of Korea)
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  • S. C. Lim,

    1. Department of Semiconductor Science and Technology, Department of Physics and Semiconductor Physics Research Center, Jeonbuk National University, Jeonju 561–756 (Republic of Korea)
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  • Y. H. Lee

    1. Department of Semiconductor Science and Technology, Department of Physics and Semiconductor Physics Research Center, Jeonbuk National University, Jeonju 561–756 (Republic of Korea)
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Abstract

The key factors determining the performance of supercapacitorshave been studied using single-walled carbon nanotube (CNT) electrodes. Heat treatment at high temperatures is found to increase the capacitance and reduce the CNT electrode resistance. A very efficient energy storage device was obtained with a CNT-Ni foam hybrid electrode as the energy density does not change appreciably with increasing power density due to its small equivalent series resistance (ESR). This approach demonstrates the possibility of using CNTs as energy storage devices.

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