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首页> 外文期刊>Journal of Materials Chemistry, A. Materials for energy and sustainability >Three-dimensional NiCo2O4 nanowire arrays: preparation and storage behavior for flexible lithium-ion and sodium-ion batteries with improved electrochemical performance
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Three-dimensional NiCo2O4 nanowire arrays: preparation and storage behavior for flexible lithium-ion and sodium-ion batteries with improved electrochemical performance

机译：三维NiCo2O4纳米线阵列：具有改善的电化学性能的柔性锂离子和钠离子电池的制备和存储行为

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摘要

The growth of three-dimensional (3D) porous NiCo2O4 nanowire arrays on a carbon fiber cloth (denoted as NCO@CFC) via a facile low-cost solution method combined with a subsequent annealing treatment is reported. The structure and morphology of the materials were characterized by X-ray diffraction, field-emission scanning electron microscopy, and transmission electron microscopy. Owing to the unique 3D hierarchical architecture, the NCO@CFC nanowires as a flexible electrode material for lithium-ion batteries exhibit a stable cycling performance (92.3% retention after 100 cycles), a fairly high rate capacity (507 mA h g(-1) at 4000 mA g(-1)), and an enhanced lithium storage capacity. When employed as an electrode material for sodium-ion batteries, the NCO@CFC is investigated in comparison with a 3D ordered array structure and exhibits similar charge/discharge characteristics and a feasible electrochemical performance. The greatly improved electrochemical performance could be ascribed to the 3D porous nanostructure of the NCO@CFC nanowire arrays together with a novel carbon skeleton, which provides enough space to allow volume expansion during the Li+/Na+ insertion/extraction process and facilitates rapid transport of ions and electrons.
机译：据报道，通过简便的低成本固溶方法和随后的退火处理，三维（3D）多孔NiCo2O4纳米线阵列在碳纤维布（表示为NCO @ CFC）上的生长。通过X射线衍射，场发射扫描电子显微镜和透射电子显微镜表征材料的结构和形态。由于独特的3D分层体系结构，NCO @ CFC纳米线作为锂离子电池的柔性电极材料具有稳定的循环性能（100次循环后92.3％的保留率），相当高的倍率容量（507 mA hg（-1））在4000 mA g（-1）时）和增强的锂存储容量。当将NCO @ CFC用作钠离子电池的电极材料时，与3D有序阵列结构进行了比较，并显示出类似的充电/放电特性和可行的电化学性能。 NCO @ CFC纳米线阵列的3D多孔纳米结构以及新颖的碳骨架可大大提高电化学性能，该结构提供了足够的空间以允许在Li + / Na +插入/萃取过程中进行体积膨胀并促进离子的快速运输和电子。

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