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231225s2018 xx |||||o 00| ||eng c |
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|a 10.1002/adma.201804149
|2 doi
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|a pubmed25n0957.xml
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|a eng
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| 100 |
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|a Luo, Liu
|e verfasserin
|4 aut
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|a Long-Life Lithium-Sulfur Batteries with a Bifunctional Cathode Substrate Configured with Boron Carbide Nanowires
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|c 2018
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|a Text
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|a ƒaComputermedien
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|a ƒa Online-Ressource
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|a Date Completed 27.09.2018
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|a Date Revised 30.09.2020
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
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|a Developing high-energy-density lithium-sulfur (Li-S) batteries relies on the design of electrode substrates that can host a high sulfur loading and still attain high electrochemical utilization. Herein, a new bifunctional cathode substrate configured with boron-carbide nanowires in situ grown on carbon nanofibers (B4 CCNF) is established through a facile catalyst-assisted process. The B4 C nanowires acting as chemical-anchoring centers provide strong polysulfide adsorptivity, as validated by experimental data and first-principle calculations. Meanwhile, the catalytic effect of B4 C also accelerates the redox kinetics of polysulfide conversion, contributing to enhanced rate capability. As a result, a remarkable capacity retention of 80% after 500 cycles as well as stable cyclability at 4C rate is accomplished with the cells employing B4 C@CNF as a cathode substrate for sulfur. Moreover, the B4 C@CNF substrate enables the cathode to achieve both high sulfur content (70 wt%) and sulfur loading (10.3 mg cm-2 ), delivering a superb areal capacity of 9 mAh cm-2 . Additionally, Li-S pouch cells fabricated with the B4 C@CNF substrate are able to host a high sulfur mass of 200 mg per cathode and deliver a high discharge capacity of 125 mAh after 50 cycles
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|a Journal Article
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|a boron carbide
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|a electrochemical performance
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|a first-principle calculations
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|a high-loading cathodes
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|a lithium-sulfur batteries
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|a Chung, Sheng-Heng
|e verfasserin
|4 aut
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|a Yaghoobnejad Asl, Hooman
|e verfasserin
|4 aut
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|a Manthiram, Arumugam
|e verfasserin
|4 aut
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|i Enthalten in
|t Advanced materials (Deerfield Beach, Fla.)
|d 1998
|g 30(2018), 39 vom: 04. Sept., Seite e1804149
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|x 1521-4095
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|g volume:30
|g year:2018
|g number:39
|g day:04
|g month:09
|g pages:e1804149
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|u http://dx.doi.org/10.1002/adma.201804149
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