Germanium-based oxide has been found to be a promising high-capacity anode material for lithium-ion batteries (LIBs). However, it exhibits poor electrochemical performance because of the drastic volume change during cycling. Herein, we designed porous Ge-Fe bimetal oxide nanowires (Ge-Fe-O_x-700 NWs) by a large-scale and facile solvothermal reaction. When used as the anode material for LIBs, these Ge-Fe-O_x-700 NWs exhibited superior electrochemical performance (∼ 1,120 mAh·g⁻¹ at a current density of 100 mA·g⁻¹) and good cycling performance (∼ 750 mAh·g⁻¹ after 50 cycles at a current density of 100 mA·g⁻¹). The improved performance is due to the small NW diameter, which allows for better accommodation of the drastic volume changes and zero-dimensional nanoparticles, which shorten the diffusion length of ions and electrons.

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已经发现锗基氧化物是锂离子电池（LIB）的有前途的高容量阳极材料。然而，由于循环期间体积的急剧变化，它表现出较差的电化学性能。在这里，我们通过大规模和容易的溶剂热反应设计了多孔Ge-Fe双金属氧化物纳米线（Ge-Fe-O _x -700 NWs）。当用作LIBS负极材料使用时，这些Ge的铁-O _X -700纳米线都优良的电化学性能（〜1120毫安·克^-1以100mA·g的电流密度^-1）和良好的循环性能（〜750 50次循环后mAh·g ^-1，电流密度为100 mA·g ^-1）。性能的提高归因于较小的NW直径，这可以更好地适应剧烈的体积变化和零维纳米粒子，从而缩短了离子和电子的扩散长度。

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