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Advanced Materials

Enhanced Power and Rechargeability of a Li−O2 Battery Based on a Hierarchical-Fibril CNT Electrode

Authors

  • Hee-Dae Lim,

    1. Department of Materials Science and Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151-742, Republic of Korea
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  • Kyu-Young Park,

    1. Department of Materials Science and Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151-742, Republic of Korea
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  • Hyelynn Song,

    1. School of Mechanical and Aerospace Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151-742, Republic of Korea
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  • Eui Yun Jang,

    1. School of Mechanical and Aerospace Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151-742, Republic of Korea
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  • Hyeokjo Gwon,

    1. Department of Materials Science and Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151-742, Republic of Korea
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  • Jinsoo Kim,

    1. Department of Materials Science and Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151-742, Republic of Korea
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  • Yong Hyup Kim,

    1. School of Mechanical and Aerospace Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151-742, Republic of Korea
    2. Institute of Advanced Aerospace Technology, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151-742, Republic of Korea
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  • Márcio D. Lima,

    1. Alan G. MacDiarmid NanoTech Institute, University of Texas at Dallas, Richardson, TX 75083-0688, USA
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  • Raquel Ovalle Robles,

    1. Alan G. MacDiarmid NanoTech Institute, University of Texas at Dallas, Richardson, TX 75083-0688, USA
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  • Xavier Lepró,

    1. Alan G. MacDiarmid NanoTech Institute, University of Texas at Dallas, Richardson, TX 75083-0688, USA
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  • Ray H. Baughman,

    1. Alan G. MacDiarmid NanoTech Institute, University of Texas at Dallas, Richardson, TX 75083-0688, USA
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  • Kisuk Kang

    Corresponding author
    1. Department of Materials Science and Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151-742, Republic of Korea
    • Department of Materials Science and Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151-742, Republic of Korea.
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Abstract

Hierarchical carbon electrodes with highly aligned carbon nanotube (CNT) fibrils are fabricated, and it is demonstrated that these electrodes, with aligned pores, can significantly enhance the cyclability and rate capability of Li−O2 batteries. The highly aligned pore structure enables good accessibility of oxygen to the inner electrode, which leads to a uniform deposition of discharge products on the individual CNTs.

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