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首页> 外文期刊>Nanotechnology >Germanium tin alloy nanowires as anode materials for high performance Li-ion batteries
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Germanium tin alloy nanowires as anode materials for high performance Li-ion batteries

机译：锗锡合金纳米线作为高性能锂离子电池的阳极材料

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摘要

The combination of two active Li-ion materials (Ge and Sn) can result in improved conduction paths and higher capacity retention. Here we report for the first time, the implementation of Ge1-xSnx alloy nanowires as anode materials for Li-ion batteries. Ge1-xSnx alloy nanowires have been successfully grown via vapor-liquid-solid technique directly on stainless steel current collectors. Ge1-xSnx (x = 0.048) nanowires were predominantly seeded from the Au0.80Ag0.20 catalysts with negligible amount of growth was also directly catalyzed from stainless steel substrate. The electrochemical performance of the the Ge1-xSnx nanowires as an anode material for Li-ion batteries was investigated via galvanostatic cycling and detailed analysis of differential capacity plots (DCPs). The nanowire electrodes demonstrated an exceptional capacity retention of 93.4% from the 2nd to the 100th charge at a C/5 rate, while maintaining a specific capacity value of similar to 921 mAh g(-1) after 100 cycles. Voltage profiles and DCPs revealed that the Ge1-xSnx nanowires behave as an alloying mode anode material, as reduction/oxidation peaks for both Ge and Sn were observed, however it is clear that the reversible lithiation of Ge is responsible for the majority of the charge stored.
机译：两个有源锂离子材料（GE和Sn）的组合可导致导电路径和更高的容量保持。在这里，我们首次报告了Ge1-Xsnx合金纳米线作为锂离子电池的阳极材料。 GE1-XSNX合金纳米纳米通过直接在不锈钢电流收集器上成功地通过蒸汽 - 液固技术成功生长。 GE1-XSNX（X = 0.048）纳米线主要从AU0.80AG0.20从Au0.80Ag0.20催化剂从不锈钢基材中直接催化出可忽略的生长量。通过Galvanostatic循环研究了作为锂离子电池的阳极材料的GE1-XSNX纳米线的电化学性能，并进行了差异容量图（DCP）的详细分析。纳米线电极以C / 5速率从第二次到第100次电荷的卓越容量保持93.4％，同时在100次循环后保持与921mAhg（-1）相似的特定容量值。电压分布和DCP显示，GE1-XSNX纳米线的表现为合金模式阳极材料，因为观察到GE和SN的还原/氧化峰，但很明显，GE的可逆锂化负责大多数电荷负责存储。

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