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Three-dimensional Ni3Sn4 Negative Electrodes for Lithium-Ion Batteries

机译:锂离子电池的三维Ni 3 Sn 4 负极

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Three-dimensional alloy based Ni3Sn4 negative electrodes were fabricated by simple electrodepositiontechnique on a mesoporous nickel foam substrate to improve the capacity and cyclability of Ni3Sn4anodes for lithium-ion batteries. The combination of thin film geometry with three-dimensional foamstructure is aimed to optimize the ionic/electronic current paths, and to accommodate the mechanicalstresses induced by the volume changes in the electrode during repeated cycling. The surfacemorphology of the obtained Ni3Sn4 alloy electrodes was characterized by scanning electronmicroscopy coupled with energy-dispersive X-ray spectroscopy. X-ray diffraction analysis wasperformed to characterize the phases and possible impurities present in the alloy. The electrochemicalfeatures of the electrodes were investigated by cyclic voltammetry and galvanostatic charge-dischargetest experiments. Obtained results showed that the as-prepared three-dimensional Ni3Sn4 anodes arecapable of providing satisfactory lithium storage and promising cycling performance.
机译:通过简单的电沉积技术在介孔泡沫镍基板上制备了三维合金基Ni3Sn4负极,以提高锂离子电池Ni3Sn4阳极的容量和可循环性。薄膜几何形状与三维泡沫结构的结合旨在优化离子/电子电流路径,并适应重复循环过程中电极体积变化引起的机械应力。通过扫描电子显微镜结合能量色散X射线光谱法表征了所获得的Ni3Sn4合金电极的表面形态。进行X射线衍射分析以表征合金中的相和可能存在的杂质。通过循环伏安法和恒电流充放电试验研究了电极的电化学特性。所得结果表明,所制备的三维Ni 3 Sn 4阳极能够提供令人满意的锂存储和有希望的循环性能。

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