Here we report the formation of high capacity Li-ion battery anodes from Si_1–xGe_x alloy nanowire arrays that are grown directly on stainless steel current collectors, in a single-step synthesis. The direct formation of these Si_1–xGe_x nanowires (ranging from Si_0.20Ge_0.80 to Si_0.67Ge_0.33) represents a simple and efficient processing route for the production of Li-ion battery anodes possessing the benefits of both Si (high capacity) and Ge (improved rate performance and capacity retention). The nanowires were characterized through SEM, TEM, XRD and ex situ HRSEM/HRTEM. Electrochemical analysis was conducted on these nanowires, in half-cell configurations, with capacities of up to 1360 mAh/g (Si_0.67Ge_0.33) sustained after 250 cycles and in full cells, against a commercial cathode, where capacities up to 1364 mAh/g (Si_0.67Ge_0.33) were retained after 100 cycles.

中文翻译：

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用于性能可调的锂离子电池阳极的合金化Si _{1– x} Ge _x纳米线的直接合成

在这里，我们报告了由Si _{1– x} Ge _x合金纳米线阵列形成的高容量锂离子电池阳极，这些阳极线在单步合成中直接在不锈钢集电器上生长。这些Si _{1– x} Ge _x纳米线（范围从Si _0.20 Ge _0.80到Si _0.67 Ge _0.33）的直接形成代表了一种生产锂离子电池阳极的简单有效的工艺路线，该阳极具有两种Si（高容量）的优势）和Ge（提高的速率性能和容量保持率）。通过SEM，TEM，XRD和非原位表征纳米线HRSEM / HRTEM。对这些纳米线进行半电池配置的电化学分析，经过250次循环后，在完整的电池中，相对于商用阴极，其容量高达1364 mAh / g，可持续维持高达1360 mAh / g（Si _0.67 Ge _0.33）的容量。100个循环后保留g（Si _0.67 Ge _0.33）。