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In this paper, well-defined Na2Zn3[Fe(CN)6]2 nanocrystals (~300 nm) have been fabricated by a facile precipitation method from low-cost precursors at room temperature. By employing [Fe(CN)6]3-/[Fe(CN)6]4- couple as redox-centers, this material can realize a Na-storage capacity of 65 mAh g-1, a high rate capability with ~32 mAh g-1 at 20 C, and an impressive cycle life with 94% capacity rentention over 1,000 cycles, offering a low-cost and high performance alternative cathode for large-scale Na-ion applications. |
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Keywords:Prussian blue; Na-ion batteries; intercalation cathode |
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