Multifunctional Cathodic Interlayer with Polysulfide Immobilization Mechanism for High-Performance Li-S Batteries

被引:14
|
作者
Waqas, Muhammad [1 ]
Manzoor Soomro, Afaque [1 ,2 ]
Ali, Shamshad [1 ]
Kumar, Suresh [1 ]
Chan, Sattar [1 ]
Hussain, Kashif [1 ,3 ]
Hussain Memon, Fida [1 ]
Ahmed Shaikh, Shoaib [1 ]
机构
[1] Sukkur IBA Univ, Dept Elect Engn, Sukkur, Pakistan
[2] Jeju Natl Univ, Dept Mechatron Engn, Jeju City, South Korea
[3] Tech Univ Munich, Dept Elect & Comp Engn, Karlstr 45, D-80333 Munich, Germany
来源
CHEMISTRYSELECT | 2020年 / 5卷 / 38期
关键词
Adsorption; interlayer; lithium sulfur batteries; molybdenum disulfide; polymer; LITHIUM-SULFUR BATTERIES; FUNCTIONAL INTERLAYER; CARBON NANOFIBERS; SELF-DISCHARGE; SEPARATOR; MEMBRANE; LAYERS; MOS2;
D O I
10.1002/slct.202003381
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
A highly efficient multifunctional polyvinylidene fluoride//carbon-molybdenum disulfide (PVDF//C-MoS2) interlayer is developed by direct deposition on sulfur cathode through facile slide coating method for Li-S batteries. The as-developed PVDF//C-MoS(2)interlayer exhibits the polysulfide adsorption and trapping capabilities, which reduces the shuttling effects and also slows down the self-discharge in Li-S batteries. The first composite layer (C-MoS2) on the cathode maximizes the level of lithium polysulfide adsorption owing to the strong dipolar interaction of Mo-S on the polarized surface of polysulfide species. Moreover, the PVDF layer physically traps/capture the remaining polysulfide species with its interconnected microstructure for the reutilization as active material in the cathode. The Li-S batteries based on interlayers deliver the discharge capacity of1086 mAh g(-1)at1 Cwith3.0 mg cm(-2)sulfur loading and show capacity decay of0.04 %per cycle after1500 cycles. In contrast, the Li-S batteries without interlayer merely maintain the discharge capacities of423 mAh g(-1)at1 Cwith3.0 mg cm(-2)sulfur loading and show severe capacity decay (0.12 %) after505cycles. The Li-S batteries also depict the remarkable cyclic performances with as-developed interlayer for high sulfur loading cathodes and efficiently slowdowns the self-discharge even after resting for a long time.
引用
收藏
页码:12009 / 12019
页数:11
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