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首页> 外文期刊>Advanced energy materials >Structure Distortion Induced Monoclinic Nickel Hexacyanoferrate as High-Performance Cathode for Na-Ion Batteries
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Structure Distortion Induced Monoclinic Nickel Hexacyanoferrate as High-Performance Cathode for Na-Ion Batteries

机译：结构畸变诱导的单斜六氰合高铁酸镍作为钠离子电池的高性能阴极

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摘要

Prussian blue analogs with an open framework are ideal cathodes for Na-ion batteries. A superior high-rate and highly stable monoclinic nickel hexacyanoferrate (NiHCF-3) is synthesized via a facile one-step crystallization-controlled co-precipitation method. It gives a high specific capacity of 85.7 mAh g(-1), nearly to its theoretical value. It also exhibits an excellent rate capability with a high capacity retention ratio of 78% at 50 C and a stable cycling performance over 1200 cycles. Through the ex situ X-ray diffraction and pair distribution function measurements, it is found that the monoclinic structure with distorted framework is greatly related to the high Na content. The electronic structure studies by density functional theory (DFT) calculation demonstrate that NiHCF-3 deformation promotes the framework conductivity and improves the electrochemical activity of Fe, which results in an ultrahigh-rate performance of monoclinic phase. Furthermore, the high-quality monoclinic (NiHCF-3) exhibits excellent compatibility with both hard carbon and NaTi2(PO4)(3) anodes in full cells, which shows great prospects for the application in the large-scale energy storage systems.
机译：具有开放框架的普鲁士蓝类似物是Na离子电池的理想阴极。通过一种简便的一步结晶控制共沉淀法合成了高速率，高稳定性的单斜六氰合铁酸镍（NiHCF-3）。它具有85.7 mAh g（-1）的高比容量，接近其理论值。它还具有出色的倍率性能，在50°C时具有78％的高容量保持率，并在1200次循环中具有稳定的循环性能。通过异位X射线衍射和成对分布函数测量，发现框架变形的单斜晶结构与高Na含量有很大关系。通过密度泛函理论（DFT）计算的电子结构研究表明，NiHCF-3形变促进了铁的骨架电导率并提高了其电化学活性，从而导致了单斜晶相的超高速性能。此外，高质量的单斜晶（NiHCF-3）在全电池中与硬碳阳极和NaTi2（PO4）（3）阳极均显示出优异的相容性，这在大规模储能系统中显示出广阔的应用前景。

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  • 来源
    《Advanced energy materials》 |2019年第4期|1803158.1-1803158.10|共10页
  • 作者

    Xu Yue; Wan Jing; Huang Li; Ou Mingyang; Fan Chenyang; Wei Peng; Peng Jian; Liu Yi; Qiu Yuegang; Sun Xueping; Fang Chun; Li Qing; Han Jiantao; Huang Yunhui; Alonso Jose Antonio; Zhao Yusheng;

  • 作者单位

    Huazhong Univ Sci & Technol, Sch Mat Sci & Engn, State Key Lab Mat Proc & Die & Mould Technol, Wuhan 430074, Hubei, Peoples R China;

    Southern Univ Sci & Technol, Dept Phys, Shenzhen 518055, Peoples R China|Chongqing Univ, Dept Appl Phys, Chongqing 401331, Peoples R China;

    Southern Univ Sci & Technol, Dept Phys, Shenzhen 518055, Peoples R China;

    Huazhong Univ Sci & Technol, Sch Mat Sci & Engn, State Key Lab Mat Proc & Die & Mould Technol, Wuhan 430074, Hubei, Peoples R China;

    Huazhong Univ Sci & Technol, Sch Mat Sci & Engn, State Key Lab Mat Proc & Die & Mould Technol, Wuhan 430074, Hubei, Peoples R China;

    Huazhong Univ Sci & Technol, Sch Mat Sci & Engn, State Key Lab Mat Proc & Die & Mould Technol, Wuhan 430074, Hubei, Peoples R China;

    Huazhong Univ Sci & Technol, Sch Mat Sci & Engn, State Key Lab Mat Proc & Die & Mould Technol, Wuhan 430074, Hubei, Peoples R China;

    Huazhong Univ Sci & Technol, Sch Mat Sci & Engn, State Key Lab Mat Proc & Die & Mould Technol, Wuhan 430074, Hubei, Peoples R China;

    Huazhong Univ Sci & Technol, Sch Mat Sci & Engn, State Key Lab Mat Proc & Die & Mould Technol, Wuhan 430074, Hubei, Peoples R China;

    Huazhong Univ Sci & Technol, Sch Mat Sci & Engn, State Key Lab Mat Proc & Die & Mould Technol, Wuhan 430074, Hubei, Peoples R China;

    Huazhong Univ Sci & Technol, Sch Mat Sci & Engn, State Key Lab Mat Proc & Die & Mould Technol, Wuhan 430074, Hubei, Peoples R China;

    Huazhong Univ Sci & Technol, Sch Mat Sci & Engn, State Key Lab Mat Proc & Die & Mould Technol, Wuhan 430074, Hubei, Peoples R China;

    Huazhong Univ Sci & Technol, Sch Mat Sci & Engn, State Key Lab Mat Proc & Die & Mould Technol, Wuhan 430074, Hubei, Peoples R China;

    Huazhong Univ Sci & Technol, Sch Mat Sci & Engn, State Key Lab Mat Proc & Die & Mould Technol, Wuhan 430074, Hubei, Peoples R China;

    Inst Ciencia Mat Madrid, Dept Energy & Environm, E-28049 Madrid, Spain;

    Southern Univ Sci & Technol, Dept Phys, Shenzhen 518055, Peoples R China;

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  • 关键词

    crystallization-controlled synthesis; high-rate capability; Prussian blue analogs; structure distortion;

    机译：结晶控制合成;高倍率能力;普鲁士蓝类似物;结构畸变;

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