异质结
双金属片
分离器(采油)
催化作用
吸附
化学工程
材料科学
硫黄
氧化还原
动力学
纳米技术
化学
有机化学
冶金
光电子学
物理
工程类
热力学
量子力学
作者
Yiqian Li,Yuehan Hao,Usman Ali,Qi Zhang,Zhanshuang Jin,Hang Sun,Lu Li,Lingyu Zhang,Chungang Wang,Bingqiu Liu
标识
DOI:10.1016/j.cej.2023.145961
摘要
The large-scale commercial application of lithium-sulfur (Li-S) batteries is severely impacted by the sluggish reaction kinetics of polysulfides conversion and the low utilization rate of active substances. It has been proved that the introduction of functional interlayers between electrodes is an effective method to inhibit the shuttle effect of lithium polysulfides (LiPSs). Herein, FeS2-MnS heterostructure is combined with carbon materials and applied to Li-S batteries through the modifying commercial separator to accelerate the redox kinetics of LiPSs. The FeS2-MnS/C//PP modified separators achieve the chemical catalysis, adsorption, and physical confinement of LiPSs through well-dispersed FeS2-MnS heterostructure and carbon materials. Compared with single-metal sulfides, the FeS2-MnS heterostructure can considerably enhance the catalysis interface effect, rapidly adsorb and promote the conversion of LiPSs. As a result, the cell with FeS2-MnS/C//PP separator displays remarkable cyclic stability (768 mAh/g at 1.0C after 500cycles with a low capacity decay of merely 0.036% per cycle) and outstanding rate capacity (660 mAh/g at 5.0C). This work provides a reference for the use of heterostructure materials as separator modifiers for Li-S batteries.
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