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首页> 外文期刊>ACS applied materials & interfaces >Boosting High Energy Density Lithium-Ion Storage via the Rational Design of an FeS-Incorporated Sulfurized Polyacrylonitrile Fiber Hybrid Cathode
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Boosting High Energy Density Lithium-Ion Storage via the Rational Design of an FeS-Incorporated Sulfurized Polyacrylonitrile Fiber Hybrid Cathode

机译：通过掺入FES掺入的硫化聚丙烯腈纤维杂交阴极的合理设计提高高能密度锂离子储存

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摘要

In order to satisfy the escalating energy demands, it is inevitable to improve the energy density of current Li-ion batteries. As the development of high-capacity cathode materials is of paramount significance compared to anode materials, here we have designed for the first time a unique synergistic hybrid cathode material with enhanced specific capacity, incorporating cost-effective iron sulfide (FeS) nanoparticles in a sulfurized polyacrylonitrile (SPAN) nanofiber matrix through a rational in situ synthesis strategy. Previous reports on FeS cathodes are scarce and consist of an amorphous carbon matrix to accommodate the volume changes encountered during the cycling process. However, this inactive buffering matrix eventually increases the weight of the cell, reducing the overall energy density. By the rational design of this hybrid composite cathode, we ensure that the presence of covalently bonded sulfur in SPAN guarantees high sulfur utilization, while effectively buffering the volume changes in FeS. Meanwhile, FeS can compensate for the conductivity issues in the SPAN, thereby realizing a synergistically driven dual-active cathode material improving the overall energy density of the composite. Simultaneous in situ generation of FeS nanoparticles within the SPAN fiber matrix was carried out via electrospinning followed by a one-step heating procedure. The developed hybrid cathode material displays enhanced lithium-ion storage, retaining 688.6 mA h g((FeS@SPAN composite))(-1) at the end of 500 cycles at 1 A g(-1) even within a narrow voltage range of 1-3.0 V. A high discharge energy density > 900 W h kg((FeS@SPAN composite))(-1), much higher than the theoretical energy density of the commercial LiCoO2 cathode, was also achieved, revealing the promising prospects of this hybrid cathode material for high energy density applications.
机译：为了满足升级的能量需求，不可避免地提高当前锂离子电池的能量密度。随着高容量阴极材料的发展与阳极材料相比至关重要的显着性，这里我们设计了首次具有增强的特定容量的独特协同混合阴极材料，其在硫化中将成本有效的硫化铁（FES）纳米颗粒掺入聚丙烯腈（跨度）纳米纤维基质通过理性原位合成策略。上一篇关于FES阴极的报告是稀缺的并且由非晶碳矩阵组成，以适应循环过程中遇到的体积变化。然而，这种非活动缓冲矩阵最终增加了细胞的重量，降低了整体能量密度。通过该杂交复合阴极的合理设计，我们确保在跨度的共价键合硫的存在保证高硫利用率，同时有效地缓冲了FES的体积变化。同时，FES可以补偿跨度中的电导率问题，从而实现了改善了复合材料的整体能量密度的协同驱动的双有源阴极材料。通过静电纺丝随后进行跨度纤维基质内的FES纳米颗粒的同时产生FES纳米颗粒。开发的混合阴极材料显示出增强的锂离子储存，即使在1A的窄电压范围内，在500次循环结束时保持688.6 mA Hg（（FES @跨度复合材料））（ - 1）即使在1的窄电压范围内-3.0 V.高放电能量密度> 900WH kg（（FES @跨度复合材料））（ - 1），远远高于商用LiCoO2阴极的理论能量密度，揭示了这一点的有希望的前景用于高能量密度应用的混合阴极材料。

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  • 来源
    《ACS applied materials & interfaces》 |2019年第33期|共10页
  • 作者

    Haridas Anupriya K.; Heo Jungwon; Liu Ying; Ahn Hyo-Jun; Zhao Xiaohui; Deng Zhao; Agostini Marco; Matic Aleksandar; Cho Kwon-Koo; Ahn Jou-Hyeon;

  • 作者单位

    Gyeongsang Natl Univ Dept Mat Engn &

    Convergence Technol 501 Jinju Daero Jinju 52828 South Korea;

    Gyeongsang Natl Univ Dept Chem Engn 501 Jinju Daero Jinju 52828 South Korea;

    Gyeongsang Natl Univ Dept Chem Engn 501 Jinju Daero Jinju 52828 South Korea;

    Gyeongsang Natl Univ Dept Mat Engn &

    Convergence Technol 501 Jinju Daero Jinju 52828 South Korea;

    Soochow Univ Coll Phys Optoelect &

    Energy Jiangsu Prov Key Lab Adv Carbon Mat &

    Wearable En Soochow Inst Energy &

    Mat Innovat 1 Shizi St Suzhou 215006 Peoples R China;

    Soochow Univ Coll Phys Optoelect &

    Energy Jiangsu Prov Key Lab Adv Carbon Mat &

    Wearable En Soochow Inst Energy &

    Mat Innovat 1 Shizi St Suzhou 215006 Peoples R China;

    Chalmers Univ Technol Dept Phys S-41296 Gothenburg Sweden;

    Chalmers Univ Technol Dept Phys S-41296 Gothenburg Sweden;

    Gyeongsang Natl Univ Dept Mat Engn &

    Convergence Technol 501 Jinju Daero Jinju 52828 South Korea;

    Gyeongsang Natl Univ Dept Mat Engn &

    Convergence Technol 501 Jinju Daero Jinju 52828 South Korea;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学工业;
  • 关键词

    iron sulfide; sulfurized polyacrylonitrile; hybrid cathode; lithium-ion batteries; energy storage;

    机译：硫化铁;硫化聚丙烯腈;杂交阴极;锂离子电池;储能;

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