Superior Li storage anode based on novel Fe-Sn-P alloy prepared by electroplating
Superior Li storage anode based on novel Fe-Sn-P alloy prepared by electroplating
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DOI：
10.1016/j.electacta.2017.07.002
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发表时间：
2017-09
影响因子：
6.6
通讯作者：
Xiaomei Zheng;Pengyue Zhang;Liangtian Wang;S. Tao;Yunxiao Wang;Ling Huang;Jun-tao Li;Shigang Sun
中科院分区：
文献类型：
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作者：
Xiaomei Zheng;Pengyue Zhang;Liangtian Wang;S. Tao;Yunxiao Wang;Ling Huang;Jun-tao Li;Shigang Sun
研究了一步电沉积法制备的新型Fe-Sn-P三元合金作为锂离子电池负极材料的性能。特别是Fe 51 Sn 38 P11电极显示出出色的锂存储性能，初始放电/充电比容量分别为857.8和655 mA h g−1。可逆容量保持稳定在427 mA h g−1，即使在90次循环后，对应于96%的库仑效率和65%的容量保持率。在90次循环后，上述阳极的菜花状形态保持良好，表明该合金可以通过施加正多相协同效应来显著减轻电极体积膨胀。三元Fe-Sn-P合金的上级电化学性能证实了其作为替代锂离子存储阳极的潜力;所开发的电镀方法的大规模适用性提供了额外的优势。
Novel ternary Fe-Sn-P alloys prepared by simple single-step electrodeposition are investigated as promising anodes for Li-ion batteries. The Fe51Sn38P11electrode, in particular, shows outstanding Li-storage properties, with initial specific discharge/charge capacities of 857.8 and 655 mA h g−1, respectively. The reversible capacity remains stable at 427 mA h g−1, even after 90 cycles, corresponding to a coulombic efficiency of 96% and a capacity retention of 65%. The cauliflower-like morphology of the above anode is well preserved after 90 cycles, suggesting that this alloy could significantly mitigate the electrode volume expansion by exerting a positive multiphase synergistic effect. The superior electrochemical performance of the ternary Fe-Sn-P alloys confirmed its potential as an alternative Li-ion storage anode; the large-scale suitability of the developed electroplating method provides an additional advantage.