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P3-type K0.32Fe0.35Mn0.65O2•0.39H2O: a promising cathode for Na-Ion full batteries

Abstract

Na-ion batteries (NIBs) are very attractive candidates for large-scale electrical energy storage due to the abundant Na resource, while developing of air stable, low cost and toxic Co/Ni-free cathode to achieve high energy/powder-density and long-life NIBs is very challenging. Herein, as a proof-of-concept experiment, rare P3-type K0.32Fe0.35Mn0.65O2•0.39H2O (KFM) made from environmentally friendly and low cost elements is first proposed and demonstrated to be novel cathode for NIBs. Unexpectedly, the KFM exhibits outstanding electrochemical performances including high specific capacity (137.5 mAh g-1), rate capability and Coulomb efficiency (ca. 100%), and long cycle stability (1000 cycles). Furthermore, a highly efficient prototype NIBs was first realized using this KFM cathode and Nax-Sb2O3 anode, which shows high energy density and power density (220.5 Wh kg−1; 4340 W kg-1) even with high round-trip energy efficiency (ca. 100%) and excellent cycling stability (over 900 cycles).

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Publication details

The article was received on 10 Apr 2018, accepted on 25 May 2018 and first published on 25 May 2018


Article type: Paper
DOI: 10.1039/C8TA03270J
Citation: J. Mater. Chem. A, 2018, Accepted Manuscript
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    P3-type K0.32Fe0.35Mn0.65O2•0.39H2O: a promising cathode for Na-Ion full batteries

    X. Zhang, S. Wang, Y. Zhu and J. Yan, J. Mater. Chem. A, 2018, Accepted Manuscript , DOI: 10.1039/C8TA03270J

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