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Preparation and performance of sulfur-carbon composite based on hollow carbon nanofiber for lithium-sulfur batteries

机译：锂硫电池中空碳纳米纤维硫碳复合材料的制备与性能

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摘要

A unique structured hollow carbon nanofiber-sulfur composite material (HCF-S) was fabricated and characterized in lithium-sulfur batteries. It is found that a part of spherical sulfur particles are located in the voids formed by the intertwined fibers and the others are confined in hollow channel of the HCF. The high conductive and porous HCF favors the construction of stable three-dimensional conducting network and convenient infiltration of the electrolytes into the cathode. The HCF-S cathode exhibits excellent electrochemical performance in the electrolyte with LiNO3. By contrast, the ionic liquid electrolyte provides insufficient shuttle suppression and weakens ion transport, which leads to poor cycle and rate capability.
机译：制备了一种独特的结构化空心碳纳米纤维-硫复合材料（HCF-S），并在锂硫电池中进行了表征。发现球形硫颗粒的一部分位于由缠结的纤维形成的空隙中，而其他的则被限制在HCF的中空通道中。高导电性和多孔性的HCF有利于构造稳定的三维导电网络，并有利于电解质渗透到阴极中。 HCF-S阴极在含LiNO3的电解质中表现出出色的电化学性能。相比之下，离子液体电解质不能提供足够的穿梭抑制并削弱离子传输，从而导致较差的循环和速率能力。

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