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Ultramicroporous carbon aerogels encapsulating sulfur as the cathode for lithium–sulfur batteries

Nojabaee, Maryam and Sievert, Brigitta and Schwan, Marina and Schettler, Jessica and Warth, Frieder and Wagner, Norbert and Milow, Barbara and Friedrich, Kaspar Andreas (2021) Ultramicroporous carbon aerogels encapsulating sulfur as the cathode for lithium–sulfur batteries. Journal of Materials Chemistry A, 10 (9), pp. 6508-6519. Royal Society of Chemistry. doi: 10.1039/D0TA11332H. ISSN 2050-7488.

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Official URL: https://pubs.rsc.org/en/content/articlelanding/2021/TA/D0TA11332H

Abstract

Highly porous carbon materials employed in sulfur cathodes are of utmost importance to the charge transport, conductivity and stability of the cathode in metal–sulfur batteries. Herein, ultramicroporous carbon aerogels as conductive matrices embedding sulfur for cathode application in lithium–sulfur batteries are synthesized and investigated. Resulting from organic resorcinol–formaldehyde aerogels, the synthesized carbon aerogels feature a highly porous structure with a surface area of 500–2000 m2 g−1 and large micropore volume up to 0.6 cm3 g−1. The effective gas-phase sulfur infiltration of the carbon aerogels and the resulting confinement of sulfur in the micropores are demonstrated. It is indicated that sulfur-infiltrated microporous carbon aerogel cathodes are able to suppress the polysulfide shuttle effect, maintaining 80% (≥1000 mA h g(S)−1) and 70% (≥800 mA h g(S)−1) of the initial discharge capacity after 200 cycles at a rate of 0.3C in carbonate and ether-based electrolytes, respectively. Remarkably, the herein prepared composite cathode can still deliver a discharge capacity of at least 700 mA h g(S)−1 at a faster rate of 2C in both electrolyte systems. The cyclability and compatibility of the ether and carbonate-based electrolytes with such a composite cathode are discussed elaborately.

Item URL in elib:https://elib.dlr.de/143420/
Document Type:Article
Title:Ultramicroporous carbon aerogels encapsulating sulfur as the cathode for lithium–sulfur batteries
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Nojabaee, MaryamUNSPECIFIEDhttps://orcid.org/0000-0001-5225-3526
Sievert, BrigittaUNSPECIFIEDhttps://orcid.org/0000-0002-0860-842X
Schwan, MarinaUNSPECIFIEDhttps://orcid.org/0000-0001-6329-8164
Schettler, JessicaUNSPECIFIEDUNSPECIFIED
Warth, FriederUNSPECIFIEDhttps://orcid.org/0000-0003-4930-2491
Wagner, NorbertUNSPECIFIEDhttps://orcid.org/0000-0002-2596-8689
Milow, BarbaraUNSPECIFIEDhttps://orcid.org/0000-0002-6350-7728
Friedrich, Kaspar AndreasUNSPECIFIEDhttps://orcid.org/0000-0002-2968-5029
Date:21 February 2021
Journal or Publication Title:Journal of Materials Chemistry A
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:10
DOI:10.1039/D0TA11332H
Page Range:pp. 6508-6519
Publisher:Royal Society of Chemistry
ISSN:2050-7488
Status:Published
Keywords:Carbon Aerogel, Sulfur, Ultramicroporous, Infiltration, Carbonate, Glyme
HGF - Research field:Energy
HGF - Program:Materials and Technologies for the Energy Transition
HGF - Program Themes:Electrochemical Energy Storage
DLR - Research area:Energy
DLR - Program:E VS - Combustion Systems
DLR - Research theme (Project):E - Materials for Electrochemical Energy Storage
Location: Stuttgart
Institutes and Institutions:Institute of Engineering Thermodynamics > Electrochemical Energy Technology
Institute of Materials Research > Aerogels and Aerogel Composites
Deposited By: Sievert, Brigitta
Deposited On:29 Oct 2021 11:08
Last Modified:23 Dec 2021 15:36

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