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Issue 23, 2019
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Microstructurally engineered nanocrystalline Fe–Sn–Sb anodes: towards stable high energy density sodium-ion batteries

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Abstract

To facilitate the commercialization of sodium-ion batteries (SIBs), advanced electrode materials with high sodiation capacities and enhanced cycling stabilities are essential. Herein, we investigate the effect of Fe incorporation into SnSb to generate a new ternary nanocrystalline composite based anode, which improves the cycling stability and performance of SIBs. We ensure a high-throughput synthetic approach via a rapid-solidification technique for efficient and industrially viable Fe–Sn–Sb alloy synthesis. Interestingly, the new ternary system possesses nanocrystalline domains that helped to alleviate the stresses induced upon the sodiation/desodiation reactions and thereby enhanced the performance. The Fe1.0–SnSb anode delivered a capacity of ∼500 mA h g−1 at a specific current density of 50 mA g−1 for over 120 cycles and a full-cell was designed, which could deliver one of the highest reported energy densities of ∼826 W h kganode−1. The promising electrochemical results assert the significance of microstructural engineering of alloying anodes and open up new avenues of research into rapidly solidified alloys for energy storage applications.

Graphical abstract: Microstructurally engineered nanocrystalline Fe–Sn–Sb anodes: towards stable high energy density sodium-ion batteries

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Publication details

The article was received on 30 Jan 2019, accepted on 20 May 2019 and first published on 21 May 2019


Article type: Paper
DOI: 10.1039/C9TA01158G
J. Mater. Chem. A, 2019,7, 14145-14152

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    Microstructurally engineered nanocrystalline Fe–Sn–Sb anodes: towards stable high energy density sodium-ion batteries

    E. Edison, S. Sreejith, H. Ren, C. T. Lim and S. Madhavi, J. Mater. Chem. A, 2019, 7, 14145
    DOI: 10.1039/C9TA01158G

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