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Naslov:The mechanism of Li2S activation in lithium-sulfur batteries: Can we avoid the polysulfide formation?
Avtorji:ID Vižintin, Alen, Kemijski inštitut Ljubljana (Avtor)
ID Chabanne, Laurent, Max Planck Institute of Colloids and Interfaces (Avtor)
ID Tchernychova, Elena, Kemijski inštitut Ljubljana (Avtor)
ID Arčon, Iztok, Univerza v Novi Gorici (Avtor)
ID Stievano, Lorenzo, Universite Montpellier II, (Avtor)
ID Aquilanti, Giuliana, Elettra-Sincrotrone Trieste (Avtor)
ID Antonietti, Markus, Max Planck Institute of Colloids and Interfaces (Avtor)
ID Fellinger, Tim-Patric, Max Planck Institute of Colloids and Interfaces (Avtor)
ID Dominko, Robert, Kemijski inštitut Ljubljana (Avtor)
Datoteke: Gradivo nima datotek, ki so prostodostopne za javnost. Gradivo je morda fizično dosegljivo v knjižnici fakultete, zalogo lahko preverite v COBISS-u. Povezava se odpre v novem oknu
Jezik:Angleški jezik
Vrsta gradiva:Delo ni kategorizirano
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:UNG - Univerza v Novi Gorici
Opis:Electrochemical reactions in the LieS batteries are considered as a multistep reaction process with at least 2e3 equilibrium states. Here we report a possibility of having a conversion of Li2S into sulfur without detectible formation of polysulfides. That was confirmed by using a novel material system consisting of carbon coated Li2S particles prepared by carbothermal reduction of Li2SO4. Two independent in operando measurements showed direct oxidation of Li2S into sulfur for this system, with almost negligible formation of polysulfides at potentials above 2.5 V vs. Li/Liþ. Our results link the diversity of first charge profiles in the literature to the Li2S oxidation mechanism and show the importance of ionic wiring within the material. Furthermore, we demonstrate that the Li2S oxidation mechanism depends on the relative amount of soluble sulfur in the electrolyte. By controlling the type and the amount of electrolyte within the encapsulating carbon shell, it is thereby possible to control the reaction mechanism of Li2S activation.
Ključne besede:Lithium-sulfur batteries Li2S active material XAS UV/Vis spectroscopy Li2S activation
Verzija publikacije:Objavljena publikacija
Leto izida:2017
Št. strani:208-217
Številčenje:344
PID:20.500.12556/RUNG-3003-d9de035e-f0c5-4d75-5ccb-8a76d1754d41 Novo okno
COBISS.SI-ID:4706555 Novo okno
DOI:http://dx.doi.org/10.1016/j.jpowsour.2017.01.112 Novo okno
NUK URN:URN:SI:UNG:REP:HW5BO5OE
Datum objave v RUNG:03.03.2017
Število ogledov:6805
Število prenosov:0
Metapodatki:XML DC-XML DC-RDF
:
VIŽINTIN, Alen, CHABANNE, Laurent, TCHERNYCHOVA, Elena, ARČON, Iztok, STIEVANO, Lorenzo, AQUILANTI, Giuliana, ANTONIETTI, Markus, FELLINGER, Tim-Patric in DOMINKO, Robert, 2017, The mechanism of Li2S activation in lithium-sulfur batteries: Can we avoid the polysulfide formation? Journal of Power Sources [na spletu]. 2017. Vol. 344, p. 208–217. [Dostopano 4 april 2025]. DOI http://dx.doi.org/10.1016/j.jpowsour.2017.01.112. Pridobljeno s: https://repozitorij.ung.si/IzpisGradiva.php?lang=slv&id=3003
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Gradivo je del revije

Naslov:Journal of Power Sources
Založnik:Elsevier
Leto izida:2017
ISSN:0378-7753

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