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Lithium-Pretreated Hard Carbon as High-Performance Sodium-Ion Battery Anodes

机译：锂预处理硬碳作为高性能钠离子电池阳极

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摘要

Hard carbon (HC) is the state-of-the-art anode material for sodium-ion batteries (SIBs). However, its performance has been plagued by the limited initial Coulombic efficiency (ICE) and mediocre rate performance. Here, experimental and theoretical studies are combined to demonstrate the application of lithium-pretreated HC (LPHC) as high-performance anode materials for SIBs by manipulating the solid electrolyte interphase in tetraglyme (TEGDME)-based electrolyte. The LPHC in TEGDME can 1) deliver 92% ICE and approximate to 220 mAh g(-1) specific capacity, twice of the capacity (approximate to 100 mAh g(-1)) in carbonate electrolyte; 2) achieve 85% capacity retention over 1000 cycles at 1000 mA g(-1) current density (4 C rate, 1 C = 250 mA g(-1)) with a specific capacity of approximate to 150 mAh g(-1), approximate to 15 times of the capacity (10 mAh g(-1)) in carbonate. The full cell of Na3V2(PO4)(3)-LPHC in TEGDME demonstrated close to theoretical specific capacity of approximate to 98 mAh g(-1) based on Na3V2(PO4)(3) cathode, approximate to 2.5 times of the value (approximate to 40 mAh g(-1)) with nontreated HC. This work provides new perception on the anode development for SIBs.
机译：硬碳（HC）是钠离子电池（SIB）的最新阳极材料。但是，其性能一直受到有限的初始库仑效率（ICE）和中等速率性能的困扰。在这里，实验和理论研究相结合，以证明锂预处理的HC（LPHC）作为SIBs高性能阳极材料的应用，方法是控制基于四甘醇二甲醚（TEGDME）的电解质中的固体电解质相。 TEGDME中的LPHC可以：1）提供> 92％的ICE，比容量约为220 mAh g（-1），是碳酸盐电解质的两倍（约100 mAh g（-1））。 2）在1000 mA g（-1）电流密度（4 C速率，1 C = 250 mA g（-1））的1000次循环中实现> 85％的容量保持率，比容量约为150 mAh g（-1） ），大约是碳酸盐中容量（10 mAh g（-1））的15倍。 TEGDME中Na3V2（PO4）（3）-LPHC的满电池表现出接近理论比容量，基于Na3V2（PO4）（3）阴极约为98 mAh g（-1），约为值的2.5倍（未经处理的HC约40 mAh g（-1））。这项工作为SIB的阳极开发提供了新的认识。

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  • 来源
    《Advanced energy materials》 |2018年第24期|1801441.1-1801441.10|共10页
  • 作者

    Xiao Biwei; Soto Fernando A.; Gu Meng; Han Kee Sung; Song Junhua; Wang Hui; Engelhard Mark H.; Murugesan Vijayakumar; Mueller Karl T.; Reed David; Sprenkle Vincent L.; Balbuena Perla B.; Li Xiaolin;

  • 作者单位

    Pacific Northwest Natl Lab, Energy & Environm Directorate, Richland, WA 99352 USA;

    Texas A&M Univ, Dept Chem Engn, College Stn, TX 77843 USA;

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

    Pacific Northwest Natl Lab, Phys & Computat Sci Directorate, Richland, WA 99352 USA;

    Pacific Northwest Natl Lab, Energy & Environm Directorate, Richland, WA 99352 USA;

    Pacific Northwest Natl Lab, Energy & Environm Directorate, Richland, WA 99352 USA;

    Pacific Northwest Natl Lab, Environm Mol Sci Lab, Richland, WA 99352 USA;

    Pacific Northwest Natl Lab, Phys & Computat Sci Directorate, Richland, WA 99352 USA;

    Pacific Northwest Natl Lab, Phys & Computat Sci Directorate, Richland, WA 99352 USA;

    Pacific Northwest Natl Lab, Energy & Environm Directorate, Richland, WA 99352 USA;

    Pacific Northwest Natl Lab, Energy & Environm Directorate, Richland, WA 99352 USA;

    Texas A&M Univ, Dept Chem Engn, College Stn, TX 77843 USA;

    Pacific Northwest Natl Lab, Energy & Environm Directorate, Richland, WA 99352 USA;

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  • 关键词

    hard carbon; lithium-pretreatment; sodium-ion batteries; tetraglyme;

    机译：硬碳;锂预处理;钠离子电池;四甘醇二甲醚;

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