Abstract The CoO/Ti3C2 composite is prepared via a facile hydrothermal route followed by calcination, of which the morphology and the microstructure are characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). CoO nanoparticles with the diameter of 10–20 nm are uniformly coated on the surface of Ti3C2 nanosheets, which increases the surface areas and prevents the aggregation of CoO. In addition, the CoO/Ti3C2 composite as an anode material for lithium-ion batteries (LIBs) demonstrates a higher initial discharge capacity of 1389 mAh g−1 with a columbic efficiency of 61% at 100 mAh g−1. The reversible capacity can remain about 313 mAh g−1 after 100 cycles, which is much higher than that of the pure Ti3C2. The present results indicate that CoO/Ti3C2 composite has a potential application in the anode of LIB.

中文翻译：

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电化学性能增强的锂离子电池用CoO/Ti 3 C 2 复合材料的水热制备

摘要 CoO/Ti3C2 复合材料是通过简单的水热途径和煅烧制备的，其形貌和微观结构通过 X 射线衍射 (XRD)、扫描电子显微镜 (SEM) 和透射电子显微镜 (TEM) 进行表征。直径为 10-20 nm 的 CoO 纳米颗粒均匀地包覆在 Ti3C2 纳米片的表面，增加了表面积并防止了 CoO 的聚集。此外，作为锂离子电池（LIBs）负极材料的 CoO/Ti3C2 复合材料表现出更高的初始放电容量，为 1389 mAh g-1，在 100 mAh g-1 时的库伦效率为 61%。100 次循环后可逆容量可保持在 313 mAh g-1 左右，远高于纯 Ti3C2。