Please use this identifier to cite or link to this item: doi:10.22028/D291-28922
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Title: Gyroidal Porous Carbon Activated with NH3 or CO2 as Lithium−Sulfur Battery Cathodes
Author(s): Krüner, Benjamin
Dörr, Tobias S.
Shim, Hwirim
Sann, Joachim
Janek, Jürgen
Presser, Volker
Language: English
Title: Batteries & Supercaps
Volume: 1
Issue: 2
Startpage: 83
Endpage: 94
Publisher/Platform: Wiley-VCH Verlag
Year of Publication: 2018
Publikation type: Journal Article
Abstract: Ordered mesoporous carbon materials, prepared from co‐assembly of a block copolymer and a commercial resol, were investigated as a sulfur host for LiS‐battery cathodes. We studied two activation methods for such carbons, namely annealing in ammonia (NH3) and carbon dioxide (CO2). We found that both activation environments drastically increased the specific surface area and establish a micro‐ and mesoporous pore structure. Treatment with NH3 also introduced nitrogen groups, which increased the initial specific capacity. The non‐activated carbon yielded carbon/sulfur cathodes with an initial capacity of ∼900 mAh/gsulfur (150 mAh/gsulfur after 100 cycles). The initial capacity was increased to 1300 mAh/gsulfur for the NH3 activated sample but with poor cycling stability. Enhanced performance stability was found for the CO2 treated sample with an initial capacity of 1100 mAh/gsulfur (700 mAh/gsulfur after 100 cycles).
DOI of the first publication: 10.1002/batt.201800013
Link to this record: hdl:20.500.11880/27820
ISSN: 2566-6223
Date of registration: 17-Sep-2019
Faculty: NT - Naturwissenschaftlich- Technische Fakultät
Department: NT - Materialwissenschaft und Werkstofftechnik
Professorship: NT - Prof. Dr. Volker Presser
Collections:SciDok - Der Wissenschaftsserver der Universität des Saarlandes

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