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Flexible Membrane Consisting of MoP Ultrafine Nanoparticles Highly Distributed Inside N and P Codoped Carbon Nanofibers as High-Performance Anode for Potassium-Ion Batteries.
Small ( IF 13.0 ) Pub Date : 2019-12-10 , DOI: 10.1002/smll.201905301 Zhibin Yi 1 , Ying Liu 1 , Yingzhi Li 1 , Liangjun Zhou 1 , Zhenyu Wang 1 , Jianqiao Zhang 1 , Hua Cheng 1 , Zhouguang Lu 1
Small ( IF 13.0 ) Pub Date : 2019-12-10 , DOI: 10.1002/smll.201905301 Zhibin Yi 1 , Ying Liu 1 , Yingzhi Li 1 , Liangjun Zhou 1 , Zhenyu Wang 1 , Jianqiao Zhang 1 , Hua Cheng 1 , Zhouguang Lu 1
Affiliation
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Rechargeable potassium-ion batteries (PIBs) have attracted tremendous attention as potential electrical energy storage systems due to the special merit of abundant resources and low cost of potassium. However, one critical barrier to achieve practical application of PIBs has been the lack of suitable electrode materials. Here, a novel flexible membrane consisting of N, P codoped carbon nanofibers decorated with MoP ultrafine nanoparticles (MoP@NPCNFs) is fabricated via a simple electrospinning method combined with the later carbonization and phosphorization process. The 3D porous CNF structure in the as-synthesized composite can shorten the transport pathways of K-ions and improve the conductivity of electrons. The ultrafine MoP nanoparticles can guarantee high specific capacity and the N, P co-doping could improve wettability of electrodes to electrolytes. As expected, the free-standing MoP@NPCNF electrode demonstrates a high capacity of 320 mAh g-1 at 100 mA g-1 , a superior rate capability maintaining 220 mAh g-1 at 2 A g-1 , as well as a capacity retention of more than 90% even after 200 cycles. The excellent rate performance, high reversible capacity, long-term cycling stability, and facile synthesis routine make this hybrid membrane promising anode for potassium-ion batteries.
中文翻译：
MoP超细纳米颗粒组成的柔性膜，高度分布在N和P共掺杂的碳纳米纤维内部，作为钾离子电池的高性能阳极。
可充电的钾离子电池（PIB）作为潜在的电能存储系统，由于其丰富的资源和低廉的钾成本具有特殊的优点，因此引起了极大的关注。然而，实现PIB实际应用的一个关键障碍是缺乏合适的电极材料。在这里，通过简单的静电纺丝方法结合后来的碳化和磷化工艺，制造了一种新型的柔性膜，该膜由装饰有MoP超细纳米粒子（MoP @ NPCNFs）的N，P共掺杂碳纳米纤维组成。合成后的复合材料中的3D多孔CNF结构可以缩短K离子的传输路径并提高电子的电导率。超细MoP纳米颗粒可确保高比容量，并且N，P共掺杂可改善电极对电解质的润湿性。如预期的那样，独立式MoP @ NPCNF电极在100 mA g-1时表现出320 mAh g-1的高容量，在2 A g-1时仍保持220 mAh g-1的优异速率能力，以及容量即使经过200个循环，仍可保持90％以上的滞留率。优异的倍率性能，高可逆容量，长期循环稳定性和简便的合成程序使这种混合膜成为钾离子电池的有希望的阳极。
更新日期：2020-01-16
中文翻译：
MoP超细纳米颗粒组成的柔性膜，高度分布在N和P共掺杂的碳纳米纤维内部，作为钾离子电池的高性能阳极。
可充电的钾离子电池（PIB）作为潜在的电能存储系统，由于其丰富的资源和低廉的钾成本具有特殊的优点，因此引起了极大的关注。然而，实现PIB实际应用的一个关键障碍是缺乏合适的电极材料。在这里，通过简单的静电纺丝方法结合后来的碳化和磷化工艺，制造了一种新型的柔性膜，该膜由装饰有MoP超细纳米粒子（MoP @ NPCNFs）的N，P共掺杂碳纳米纤维组成。合成后的复合材料中的3D多孔CNF结构可以缩短K离子的传输路径并提高电子的电导率。超细MoP纳米颗粒可确保高比容量，并且N，P共掺杂可改善电极对电解质的润湿性。如预期的那样，独立式MoP @ NPCNF电极在100 mA g-1时表现出320 mAh g-1的高容量，在2 A g-1时仍保持220 mAh g-1的优异速率能力，以及容量即使经过200个循环，仍可保持90％以上的滞留率。优异的倍率性能，高可逆容量，长期循环稳定性和简便的合成程序使这种混合膜成为钾离子电池的有希望的阳极。
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