An Electrospun Core–Shell Nanofiber Web as a High‐Performance Cathode for Iron Disulfide‐Based Rechargeable Lithium Batteries,ChemSusChem

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An Electrospun Core–Shell Nanofiber Web as a High‐Performance Cathode for Iron Disulfide‐Based Rechargeable Lithium Batteries
ChemSusChem ( IF 7.5 ) Pub Date : 2018-09-14 , DOI: 10.1002/cssc.201801587
Anupriya K. Haridas ₁ , Ji‐Eun Lim ₂ , Du‐Hyun Lim ₃ , Jeha Kim ₂ , Kwon Koo Cho ₁ , Aleksandar Matic ₃ , Jae‐Kwang Kim ₂ , Jou‐Hyeon Ahn ₁

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FeS₂/C core–shell nanofiber webs were synthesized for the first time by a unique synthesis strategy that couples electrospinning and carbon coating of the nanofibers with sucrose. The design of the one‐dimensional core–shell morphology was found to be greatly beneficial for accommodating the volume changes encountered during cycling, to induce shorter lithium ion diffusion pathways in the electrode, and to prevent sulfur dissolution during cycling. A high discharge capacity of 545 mAh g⁻¹ was retained after 500 cycles at 1 C, exhibiting excellent stable cycling performance with 98.8 % capacity retention at the last cycle. High specific capacities of 854 mAh g⁻¹, 518 mAh g⁻¹, and 208 mAh g⁻¹ were obtained at 0.1 C, 1 C, and 10 C rates, respectively, demonstrating the exceptional rate capability of this nanofiber web cathode.

中文翻译：

电纺核壳纳米纤维网，作为基于二硫化铁的可充电锂电池的高性能阴极

FeS ₂ / C核-壳纳米纤维网是通过独特的合成策略首次合成的，该策略将静电纺丝和碳纤维与蔗糖的碳涂层结合在一起。发现一维核-壳形态的设计对于适应循环过程中遇到的体积变化，诱导较短的锂离子在电极中的扩散途径以及防止循环过程中的硫溶解非常有益。在1 C下进行500次循环后，保留了545 mAh g ^-1的高放电容量，表现出出色的稳定循环性能，最后一次循环的容量保持率为98.8％。854毫安克高比容量^-1，518毫安g ^ ^-1和208毫安时g ^ ^-1 分别在0.1 C，1 C和10 C的速率下得到的纳米线，证明了这种纳米纤维幅材阴极的优异速率能力。

更新日期：2018-09-14

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