Molybdenum phosphide (MoP) is one promising electro-active material for lithium ion batteries (LIBs) in view of its high theoretical capacity. However, major challenges, such as poor cycling stability, still need to be solved for MoP anodes. In this work, we have proposed a facile, template-free strategy to synthesize MoP-C microspheres by carbonization and phosphorization of a Mo-polydopamine precursor at a high temperature without a hydrothermal process. The carbon framework is derived from the carbonization of dopamine, which not only improves the conductivity and the surface area of MoP, but also relieves the volume expansion during the cycling procedure. Due to its microstructure, the porous MoP-C microsphere anode exhibited excellent lithium storage performance, including a good cycling stability and specific capacity. The MoP-C material also exhibited excellent cycling properties with a capacity of 1152 mA h g⁻¹ for 150 cycles at 200 mA h g⁻¹. It is expected that this strategy for preparing MoP-C microspheres can be applied for other metal phosphides for LIBs.

中文翻译：

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无需水热处理即可制备多孔MoP-C微球作为锂离子电池的高容量阳极

鉴于其理论容量高，磷化钼（MoP）是一种有前途的锂离子电池（LIBs）电活性材料。但是，对于MoP阳极，仍需要解决主要挑战，例如较差的循环稳定性。在这项工作中，我们提出了一种简便，无模板的策略，该方法无需高温即可通过Mo-polydopamine前体的碳化和磷化来合成MoP-C微球。碳骨架源自多巴胺的碳化，这不仅提高了MoP的电导率和表面积，而且减轻了循环过程中的体积膨胀。由于其微结构，多孔MoP-C微球阳极具有出色的锂存储性能，包括良好的循环稳定性和比容量。^-1在200 mA hg ^-1下进行150个循环。预期该制备MoP-C微球的策略可用于LIB的其他金属磷化物。