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首页> 外文期刊>Advanced energy materials >Functionalized Boron Nitride Nanosheets/Graphene Interlayer for Fast and Long-Life Lithium-Sulfur Batteries
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Functionalized Boron Nitride Nanosheets/Graphene Interlayer for Fast and Long-Life Lithium-Sulfur Batteries

机译：快速和长寿命锂硫电池的功能化氮化硼纳米片/石墨烯中间层

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摘要

Lithium-sulfur (Li-S) batteries have a much higher energy density than Li ion batteries and thus are considered as next generation batteries for electric vehicle applications. However, the problem of rapid capacity fading due to the shuttling of soluble polysulfides between electrodes remains the main obstacle for practical applications. Here, a thin and selective interlayer structure has been designed and produced to decrease the charge transfer resistance and mitigate the shuttling problem, simply by coating the surface of cathode with a thin film of functionalized boron nitride nanosheets/graphene. Due to this thin and ultralight interlayer, the specific capacity and cycling stability of the Li-S batteries with a cathode of sulfur-containing porous carbon nanotubes (approximate to 60 wt% sulfur content) have been improved significantly with a life of over 1000 cycles, an initial specific capacity of 1100 mA h g(-1) at 3 C, and a cycle decay as low as 0.0037% per cycle. This new interlayer provides a promising approach to significantly enhance the performance of Li-S batteries.
机译：锂硫（Li-S）电池比锂离子电池具有更高的能量密度，因此被认为是电动汽车应用的下一代电池。然而，由于电极之间的可溶性多硫化物的穿梭而导致的快速容量衰减的问题仍然是实际应用中的主要障碍。在这里，已经设计并生产出了一种薄而有选择的夹层结构，以降低电荷转移阻力并减轻穿梭问题，只需通过在阴极表面涂上一层功能化氮化硼纳米片/石墨烯薄膜即可。由于这种薄而超轻的中间层，具有含硫多孔碳纳米管阴极（硫含量约为60 wt％）的Li-S电池的比容量和循环稳定性已得到显着改善，使用寿命超过1000次循环，在3 C时的初始比容量为1100 mA hg（-1），每个循环的循环衰减低至0.0037％。这种新的中间层为显着提高Li-S电池的性能提供了一种有前途的方法。

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  • 来源
    《Advanced energy materials》 |2017年第13期|1602380.1-1602380.6|共6页
  • 作者

    Fan Ye; Yang Zhi; Hua Wuxing; Liu Dan; Tao Tao; Rahman Md Mokhlesur; Lei Weiwei; Huang Shaoming; Chen Ying;

  • 作者单位

    Deakin Univ, Inst Frontier Mat, Waurn Ponds, Vic 3216, Australia;

    Wenzhou Univ, Nanomat & Chem Key Lab, Wenzhou 325027, Peoples R China;

    Wenzhou Univ, Nanomat & Chem Key Lab, Wenzhou 325027, Peoples R China;

    Deakin Univ, Inst Frontier Mat, Waurn Ponds, Vic 3216, Australia;

    Deakin Univ, Inst Frontier Mat, Waurn Ponds, Vic 3216, Australia|Guangdong Univ Technol, Sch Mat & Energy, Guangzhou 510006, Guangdong, Peoples R China;

    Deakin Univ, Inst Frontier Mat, Waurn Ponds, Vic 3216, Australia;

    Deakin Univ, Inst Frontier Mat, Waurn Ponds, Vic 3216, Australia;

    Wenzhou Univ, Nanomat & Chem Key Lab, Wenzhou 325027, Peoples R China;

    Deakin Univ, Inst Frontier Mat, Waurn Ponds, Vic 3216, Australia;

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