文献类型：期刊文献

英文题名：Aramid Fibers Modulated Polyethylene Separator as Efficient Polysulfide Barrier for High-Performance Lithium-Sulfur Batteries

作者：Gu, Jifeng[1];Zhang, Jiaping[1];Su, Yun[1];Yu, Xu[2]

第一作者：Gu, Jifeng

通讯作者：Yu, X[1]

机构：[1]Xinxiang Univ, Coll Phys & Elect Engn, Xinxiang 453003, Henan, Peoples R China;[2]Yangzhou Univ, Sch Chem & Chem Engn, Yangzhou 250002, Jiangsu, Peoples R China

第一机构：新乡学院物理与电子工程学院

通讯机构：[1]corresponding author), Yangzhou Univ, Sch Chem & Chem Engn, Yangzhou 250002, Jiangsu, Peoples R China.

年份：2022

卷号：12

期号：15

外文期刊名：NANOMATERIALS

收录：;Scopus(收录号：2-s2.0-85136929678);WOS:【SCI-EXPANDED(收录号:WOS:000839829500001)】；

基金：This research was funded by the Key Project of Natural Science of the Education Department of Henan Province (Grant No. 21B430014).

语种：英文

外文关键词：nanoporous; aramid fibers; polysulfides; Li-S battery

摘要：The separators with high absorbability of polysulfides are essential for improving the electrochemical performance of lithium-sulfur (Li-S) batteries. Herein, the aramid fibers coated polyethylene (AF-PE) films are designed by roller coating, the high polarity of AFs can strongly increase the binding force at AF/PE interfaces to guarantee the good stability of the hybrid film. As confirmed by the microscopic analysis, the AF-PE-6 film with the nanoporous structure exhibits the highest air permeability by the optimal coating content of AFs. The high absorbability of polysulfides for AF-PE-6 film can effectively hinder the migration of polysulfides and alleviate the shuttle effect of the Li-S battery. AF-PE-6 cell shows the specific capacity of 661 mAh g(-1) at 0.1 C. After 200 charge/discharge cycles, the reversible specific capacity is 542 mAh g(-1) with the capacitance retention of 82%, implying the excellent stability of AF-PE-6. The enhanced cell performance is attributed to the porous architecture of the aramid layer for trapping the dissolved sulfur-containing species and facilitating the charge transfer, as confirmed by SEM and EDS after 200 cycles. This work provides a facile way to construct the aramid fiber-coated separator for the inhibition of polysulfides in the Li-S battery.