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- W3199425878 abstract "Lithium sulfur (Li-S) batteries represent one of the most promising future power batteries due to their remarkable advantages of low cost and ultrahigh theoretical energy density. However, the commercial applications of Li-S batteries have long been plagued by the shuttling effect of polysulfides and sluggish redox kinetics of these species. Herein, we designed a novel battery separator coated by a europium oxide-doped porous Ketjen Black (Eu2O3/KB) and tested its performance for the Li-S batteries for the first time. Experimental results and theoretical calculations reveal that the improved electrochemical performance can be attributed to the presence of Eu2O3. The strong binding effect between Eu2O3 and polysulfides is demonstrated in two aspects: (1) there exist strong interactions between Eu2O3 as a Lewis acid and polysulfides of strong Lewis basicity; (2) Eu2O3 with oxygen-vacancy defects provides active sites for catalyzing polysulfide conversion and polysulfide trapping. Thus, a Li-S battery with the Eu2O3/KB modified separator delivers highly stable cycling performance and excellent rate capability, with the capacity decay ratio of merely 0.05% per cycle under 1 C rate during 500 cycles, and high specific capacity of 563 mAh g-1 at 3 C rate. This work offers a meaningful exploration of the application of rare earth oxides for the modification of the separator towards high performance Li-S batteries." @default.
- W3199425878 created "2021-09-27" @default.
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- W3199425878 date "2021-01-01" @default.
- W3199425878 modified "2023-10-16" @default.
- W3199425878 title "A novel battery separator coated by a europium oxide/carbon nanocomposite enhances the performance of lithium sulfur batteries" @default.
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- W3199425878 doi "https://doi.org/10.1039/d1nr04855d" @default.
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