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首页> 外文期刊>The journal of physical chemistry, C. Nanomaterials and interfaces >Co3O4 Nanocages for High-Performance Anode Material in Lithium-Ion Batteries
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Co3O4 Nanocages for High-Performance Anode Material in Lithium-Ion Batteries

机译：Co3O4纳米笼用于锂离子电池中高性能阳极材料

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摘要

Co3O4 nanoparticles have been prepared by a facile strategy, which involves the thermal decomposition of nanoparticles of cobalt-based Prussian blue analogues at different temperatures. The nanoparticles prepared at 450, 550, 650, 750, and 850 °C exhibited a high discharge capacity of 800, 970, 828, 854, and 651 mAhg~(-1), respectively, after 30 cycles at a current density of 50 mAg~(-1). The nanocages produced at 550 °C show the highest lithium storage capacity. It is found that the nanocages display nanosize grains, hollow structure, a porous shell, and large specific surface area. At the temperature higher than 650 °C, the samples with larger grains, better crystallinity, and lower specific surface area can be obtained. It is found that the size, crystallinity, and morphology of nanoparticles have different effects on electrochemical performance. Better crystallinity. is able to enhance the initial discharge capacity, while porous structure can reduce the irreversible loss. Therefore, the optimal size, crystallinity, and cage morphology are suggested to be responsible for the improved lithium storage capacity of the sample prepared at 550 °C. The as-prepared Co3O4 nanoparticles also have a potential application as anode material for Li-ion batteries due to their simple synthesis method and large capacity.
机译：Co3O4纳米颗粒已通过一种简便的策略制备，该策略涉及在不同温度下对钴基普鲁士蓝类似物的纳米颗粒进行热分解。在450、550、650、750和850°C下制备的纳米粒子在30次循环，电流密度为50的情况下分别显示出800、970、828、854和651 mAhg〜（-1）的高放电容量。 mAg〜（-1）。在550°C下生产的纳米笼显示出最高的锂存储容量。发现纳米笼显示纳米尺寸的晶粒，中空结构，多孔壳和大的比表面积。在高于650°C的温度下，可以获得具有更大晶粒，更好的结晶度和更低的比表面积的样品。发现纳米颗粒的尺寸，结晶度和形态对电化学性能具有不同的影响。更好的结晶度。能够增强初始放电容量，而多孔结构可以减少不可逆损失。因此，建议在550°C下制备的样品具有最佳的尺寸，结晶度和笼形结构，以改善锂的储存能力。所制备的Co3O4纳米颗粒由于其简单的合成方法和大容量，也有潜在的应用作为锂离子电池的负极材料。

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