Abstract Rapid electrochemical dynamics and stable structures are critical for the practical application of transition metal phosphides (TMPs)-based lithium-ion batteries anode materials. Herein, a facile strategy is developed to construct a self-supporting 3D porous dual-phase Co2P-Co film covered by a carbon layer (Co2P-Co@C) based on the bubble template method electrodeposition of CoP film, glucose adsorption, and annealing treatment. The electron/ion transport is improved due to a large number of active sites and increased conductivity of Co2P by Co and carbon coating. Meanwhile, the volume expansion is alleviated, benefiting from the sufficient space provided by porous structure and the protection of carbon layer. Consequently, the Co2P-Co@C film exhibits high reversible capacity (823 mAh g−1 at 0.2 A g−1 after 100 cycles), excellent rate capability (506 mA h g−1 at 4 A g−1) and outstanding long-term cycling stability (567.9 mAh g−1 at 2 A g−1 after 400 cycles).

中文翻译：

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具有优异电化学动力学的独立分层 3D 多孔 Co2P-Co@C 薄膜可增强锂离子电池负极性能

摘要 快速的电化学动力学和稳定的结构对于过渡金属磷化物（TMPs）基锂离子电池负极材料的实际应用至关重要。在此，基于 CoP 膜的气泡模板法电沉积、葡萄糖吸附和退火，开发了一种简便的策略来构建由碳层覆盖的自支撑 3D 多孔双相 Co2P-Co 膜（Co2P-Co@C）治疗。由于大量的活性位点和通过 Co 和碳涂层增加的 Co2P 电导率，电子/离子传输得到改善。同时，得益于多孔结构提供的足够空间和碳层的保护，体积膨胀得到缓解。因此，Co2P-Co@C 薄膜表现出高可逆容量（100 次循环后在 0.2 A g-1 时为 823 mAh g-1），