Preparation of porous MoP-C microspheres without a hydrothermal process as a high capacity anode for lithium ion batteries
Preparation of porous MoP-C microspheres without a hydrothermal process as a high capacity anode for lithium ion batteries
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无需水热法制备多孔MoP-C微球作为锂离子电池高容量负极
DOI：
10.1039/c8qi00243f
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发表时间：
2018-06
影响因子：
7
通讯作者：
Chai Yaqin
中科院分区：
文献类型：
--
作者：
Yang Xia;Li Qin;Wang Huijun;Feng Jing;Zhang Min;Yuan Ruo;Chai Yaqin
磷化钼（MoP）具有较高的理论容量，是一种很有前途的锂离子电池电活性材料。然而，MoP阳极仍然需要解决诸如循环稳定性差等主要挑战。在这项工作中，我们提出了一个简单的，无模板的策略，合成MoP-C微球的碳化和磷化钼聚多巴胺前体在高温下没有水热过程。碳骨架是由多巴胺的碳化作用形成的，它不仅提高了MoP的电导率和比表面积，而且缓解了循环过程中的体积膨胀。由于其微观结构，多孔MoP-C微球阳极表现出优异的储锂性能，包括良好的循环稳定性和比容量。MoP-C材料还表现出优异的循环性能，在200 mA h g−1下循环150次的容量为1152 mA h g − 1。预计这种制备MoP-C微球的策略可以应用于用于LIB的其他金属磷化物。
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.
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