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首页> 外文期刊>Applied Surface Science >Chemical Grafting-derived N, P Co-doped Hollow Microporous Carbon Spheres for High-Performance Sodium-ion Battery Anodes
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Chemical Grafting-derived N, P Co-doped Hollow Microporous Carbon Spheres for High-Performance Sodium-ion Battery Anodes

机译：化学接枝衍生的N，P共掺杂中空微孔碳球，用于高性能钠离子电池阳极

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摘要

Microstructure design combined with high-level heteroatoms doping has been considered the leading approach for preparing the high-performance carbon anodes for sodium-ion batteries (SIBs). Herein, a hollow porous carbon sphere (NP-HPCS) that exhibits a high N, P co-doping level (6.05 at% for N, 5.19 at% for P) and a large microporous specific area (339 m(2 )g(-1)) is reported. The microporous and N, P co-doping synergistic construction of the NP-HPCS was achieved by a high-efficiency chemical grafting of hexachlorocyclotriphosphazene (HCCP) onto polydopamine (PDA) shell, accompanied by the in situ micellar transformation of pore-forming agent F127 in the grafting process. The as-prepared NP-HPCS used as an anode for SIBs delivers a superior rate capacity (similar to 101 mAh g(-1) at 20 A g(-1)) and an excellent long cycle performance (similar to 120 mAh g(-1) after 5000 cycles at 5 A g(-1)). The kinetics analysis and density functional theory (DFT) calculations were carried out to further analyze the superior sodium storage performance of NP-HPCS. Our work suggests an effective way to develop high-performance carbon anode materials for SIBs.
机译：微观结构设计与高级杂原子掺杂相结合，已被认为是制备用于钠离子电池（SIB）的高性能碳阳极的主要方法。这里，具有高N，P-P掺杂水平的中空多孔碳球（NP-HPCs）（对于N，5.19at％为6.05，P）和大的微孔特异性面积（339m（2）G（报道了-1）。通过将六氯环三磷嘧啶（HCCP）的高效化学接枝到聚二胺（PDA）壳上，通过孔隙成形剂F127的原位胶束转化来实现NP-HPC的微孔和N.PPC的掺杂协同结构。在嫁接过程中。用作SIB的阳极的制备的NP-HPC可提供优异的速率（类似于101mAhg（-1）），在20 A g（-1））和优异的长循环性能（类似于120 mAh g（ -1）5000g（-1）的5000个循环后）。进行动力学分析和密度泛函理论（DFT）计算，以进一步分析NP-HPC的卓越钠储存性能。我们的工作表明，为SIBS开发高性能碳阳极材料的有效方法。

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  • 来源
    《Applied Surface Science》 |2020年第jul15期|146221.1-146221.9|共9页
  • 作者

    Wang Haijun; Lan Jin-Le; Yuan Haocheng; Luo Shicheng; Huang Yiqian; Yu Yunhua; Cai Qing; Yang Xiaoping;

  • 作者单位

    Beijing Univ Chem Technol Coll Mat Sci & Engn State Key Lab Organ Inorgan Composites Beijing 100029 Peoples R China;

    Beijing Univ Chem Technol Coll Mat Sci & Engn State Key Lab Organ Inorgan Composites Beijing 100029 Peoples R China;

    Beijing Univ Chem Technol Coll Mat Sci & Engn State Key Lab Organ Inorgan Composites Beijing 100029 Peoples R China;

    Beijing Univ Chem Technol Coll Mat Sci & Engn State Key Lab Organ Inorgan Composites Beijing 100029 Peoples R China;

    Beijing Univ Chem Technol Coll Mat Sci & Engn State Key Lab Organ Inorgan Composites Beijing 100029 Peoples R China;

    Beijing Univ Chem Technol Coll Mat Sci & Engn State Key Lab Organ Inorgan Composites Beijing 100029 Peoples R China;

    Beijing Univ Chem Technol Coll Mat Sci & Engn State Key Lab Organ Inorgan Composites Beijing 100029 Peoples R China;

    Beijing Univ Chem Technol Coll Mat Sci & Engn State Key Lab Organ Inorgan Composites Beijing 100029 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Chemical grafting; N, P co-doping; Porous carbon; DFT calculations; Sodium-ion battery;

    机译：化学接枝;n;p co-ping;多孔碳;DFT计算;钠离子电池;

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