Abstract MXene is widely used as electrode materials in lithium-ion batteries due to its unique morphology, which realizes rapid ion diffusion and provides more ion insertion channels, whereas transition metal phosphides show a promising lithium storage performance in the field of energy storage due to their high theoretical capacity. In the present paper, cobalt phosphide nanoparticles (NPs) were self-grown on Ti3C2 sheets via a low-temperature phosphating method, which showed good cycle stability as the anode in lithium-ion batteries (LIBs). After 1000 cycles, the specific capacity was maintained at 650 mAh g−1 with a high coulombic efficiency (98.8%) at 700 mA g−1, which was approximately 4 and 6 times higher than that of pristine CoP–Co2P and pure Ti3C2, respectively. The enhanced electrochemical performance was attributed to the large specific surface (61.2 m2 g−1), which offered sufficient active sites for the electrochemical reaction. Also, the outstanding redox reaction activity of cobalt phosphide effectively improved the electrochemical reaction efficiency during the charge-discharge process. The strategy proposed in this study could be extended to other two dimensional (2D) materials to achieve their full potential.

中文翻译：

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在 Ti3C2 纳米片上生长的磷化钴纳米颗粒可提高锂离子存储性能

摘要 MXene因其独特的形貌而被广泛用作锂离子电池的电极材料，可实现快速的离子扩散并提供更多的离子插入通道，而过渡金属磷化物由于其在储能领域表现出良好的储锂性能。高理论容量。在本文中，磷化钴纳米粒子（NPs）通过低温磷化方法在 Ti3C2 片上自生长，作为锂离子电池（LIBs）的负极表现出良好的循环稳定性。1000 次循环后，比容量保持在 650 mAh g-1，在 700 mA g-1 时具有高库仑效率（98.8%），比原始 CoP-Co2P 和纯 Ti3C2 高约 4 和 6 倍，分别。增强的电化学性能归因于大比表面积（61.2 m2 g-1），它为电化学反应提供了足够的活性位点。此外，磷化钴优异的氧化还原反应活性有效地提高了充放电过程中的电化学反应效率。本研究中提出的策略可以扩展到其他二维 (2D) 材料，以发挥其全部潜力。