Beyond the Polysulfide Shuttle and Lithium Dendrite Formation : Addressing the Sluggish Sulfur Redox Kinetics for Practical High-Energy Li-S Batteries
© 2020 Wiley-VCH GmbH..
Electrolyte modulation simultaneously suppresses polysulfide the shuttle effect and lithium dendrite formation of lithium-sulfur (Li-S) batteries. However, the sluggish S redox kinetics, especially under high S loading and lean electrolyte operation, has been ignored, which dramatically limits the cycle life and energy density of practical Li-S pouch cells. Herein, we demonstrate that a rational combination of selenium doping, core-shell hollow host structure, and fluorinated ether electrolytes enables ultrastable Li stripping/plating and essentially no polysulfide shuttle as well as fast redox kinetics. Thus, high areal capacity (>4 mAh cm-2 ) with excellent cycle stability and Coulombic efficiency were both demonstrated in Li metal anode and thick S cathode (4.5 mg cm-2 ) with a low electrolyte/sulfur ratio (10 μL mg-1 ). This research further demonstrates a durable Li-Se/S pouch cell with high specific capacity, validating the potential practical applications.
Errataetall: |
ErratumIn: Angew Chem Int Ed Engl. 2021 Oct 4;60(41):22106. - PMID 34570425 |
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Medienart: |
E-Artikel |
Erscheinungsjahr: |
2020 |
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Erschienen: |
2020 |
Enthalten in: |
Zur Gesamtaufnahme - volume:59 |
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Enthalten in: |
Angewandte Chemie (International ed. in English) - 59(2020), 40 vom: 28. Sept., Seite 17634-17640 |
Sprache: |
Englisch |
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Beteiligte Personen: |
Zhao, Chen [VerfasserIn] |
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Links: |
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Themen: |
Cathodes |
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Anmerkungen: |
Date Revised 27.09.2021 published: Print-Electronic ErratumIn: Angew Chem Int Ed Engl. 2021 Oct 4;60(41):22106. - PMID 34570425 Citation Status PubMed-not-MEDLINE |
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doi: |
10.1002/anie.202007159 |
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funding: |
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Förderinstitution / Projekttitel: |
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PPN (Katalog-ID): |
NLM312220510 |
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520 | |a Electrolyte modulation simultaneously suppresses polysulfide the shuttle effect and lithium dendrite formation of lithium-sulfur (Li-S) batteries. However, the sluggish S redox kinetics, especially under high S loading and lean electrolyte operation, has been ignored, which dramatically limits the cycle life and energy density of practical Li-S pouch cells. Herein, we demonstrate that a rational combination of selenium doping, core-shell hollow host structure, and fluorinated ether electrolytes enables ultrastable Li stripping/plating and essentially no polysulfide shuttle as well as fast redox kinetics. Thus, high areal capacity (>4 mAh cm-2 ) with excellent cycle stability and Coulombic efficiency were both demonstrated in Li metal anode and thick S cathode (4.5 mg cm-2 ) with a low electrolyte/sulfur ratio (10 μL mg-1 ). This research further demonstrates a durable Li-Se/S pouch cell with high specific capacity, validating the potential practical applications | ||
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