Batteries: Na4-αM2+α/2(P2O7)2 (2/3 ≤ α ≤ 7/8, M = Fe, Fe0.5Mn0.5, Mn): A Promising Sodium Ion Cathode for Na-ion Batteries (Adv. Energy Mater. 6/2013)

Authors

  • Kwang-Ho Ha,

    1. Interdisciplinary School of Green Energy and KIER-UNIST Advanced Center for Energy, Ulsan National Institute of Science and Technology (UNIST), 100 Banyeon-ri, Eonyang-eup, Ulju-gun, Ulsan, 689-798, South Korea
    Current affiliation:
    1. K.H.H. and S.H.W. contributed equally to this work.
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  • Seung Hee Woo,

    1. Interdisciplinary School of Green Energy and KIER-UNIST Advanced Center for Energy, Ulsan National Institute of Science and Technology (UNIST), 100 Banyeon-ri, Eonyang-eup, Ulju-gun, Ulsan, 689-798, South Korea
    Current affiliation:
    1. K.H.H. and S.H.W. contributed equally to this work.
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  • Duckgyun Mok,

    1. Interdisciplinary School of Green Energy and KIER-UNIST Advanced Center for Energy, Ulsan National Institute of Science and Technology (UNIST), 100 Banyeon-ri, Eonyang-eup, Ulju-gun, Ulsan, 689-798, South Korea
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  • Nam-Soon Choi,

    1. Interdisciplinary School of Green Energy and KIER-UNIST Advanced Center for Energy, Ulsan National Institute of Science and Technology (UNIST), 100 Banyeon-ri, Eonyang-eup, Ulju-gun, Ulsan, 689-798, South Korea
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  • Yuwon Park,

    1. School of Chemical and Biological Engineering, Seoul National University, 599 Gwanangno, Gwanak-gu, Seoul, 151-744, South Korea
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  • Seung M. Oh,

    1. School of Chemical and Biological Engineering, Seoul National University, 599 Gwanangno, Gwanak-gu, Seoul, 151-744, South Korea
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  • Youngshol Kim,

    1. SK Innovation Co., 325 Exporo, Yuseong-gu, Daejeon, 305-712, South Korea
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  • Jeongsoo Kim,

    1. SK Innovation Co., 325 Exporo, Yuseong-gu, Daejeon, 305-712, South Korea
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  • Junesoo Lee,

    1. SK Innovation Co., 325 Exporo, Yuseong-gu, Daejeon, 305-712, South Korea
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  • Linda F. Nazar,

    Corresponding author
    1. Department of Chemistry, University of Waterloo, 200 University Avenue west, Waterloo, Ontario, N2L 3G1, Canada
    • Department of Chemistry, University of Waterloo, 200 University Avenue west, Waterloo, Ontario, N2L 3G1, Canada.
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  • Kyu Tae Lee

    Corresponding author
    1. Interdisciplinary School of Green Energy and KIER-UNIST Advanced Center for Energy, Ulsan National Institute of Science and Technology (UNIST), 100 Banyeon-ri, Eonyang-eup, Ulju-gun, Ulsan, 689-798, South Korea
    • Interdisciplinary School of Green Energy and KIER-UNIST Advanced Center for Energy, Ulsan National Institute of Science and Technology (UNIST), 100 Banyeon-ri, Eonyang-eup, Ulju-gun, Ulsan, 689-798, South Korea
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Abstract

original image

Sodium-ion batteries are an attractive alternative to replace Lithium-ion batteries and Ni–metal hydride batteries for electric vehicle and smart grid applications. Kyu Tae Lee, Linda F. Nazar, and co-workers demonstrate on page 770, for the first time, the synthesis of new polyanion-based compounds, Na3.12M2.44(P2O7)2 (M=Fe, Fe0.5Mn0.5, Mn), and their electrochemical performance as a cathode material for Na ion batteries. The deliberate synthesis of the off-stoichiometric phase, Na3.42Fe2.44(P2O7)2.05 shows excellent cycle and rate performance, and this is attributed to the spacious channel size along the a-axis, along with a single phase transformation upon de/sodiation.

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