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Titel: Electrospun vanadium sulfide / carbon hybrid fibers obtained via one-step thermal sulfidation for use as lithium-ion battery electrodes
VerfasserIn: Husmann, Samantha
Budak, Öznil
Quade, Antje
Frank, Anna
Kruth, Angela
Scheu, Christina
Tolosa Rodriguez, Aura Monserrat
Presser, Volker
Sprache: Englisch
Titel: Journal of power sources : the international journal on the science and technology of electrochemical energy systems
Bandnummer: 450
Startseite: 1
Endseite: 11
Verlag/Plattform: Elsevier
Erscheinungsjahr: 2020
Dokumenttyp: Journalartikel / Zeitschriftenartikel
Abstract: Many metal sulfides present a layered structure with large interlayer space and a high theoretical capacity for lithium-ion battery applications. Compared to other transition metal dichalcogenides, vanadium sulfides remain little explored. Vanadium sulfides are commonly obtained by hydrothermal synthesis, which requires further post-processing and coating with binder and carbon additives. Here, we introduce a route to obtain free-standing vanadium sulfide fiber mats with in-built carbon. The combination of electrospinning and thermal sulfidation with H2S produces homogeneous vanadium sulfide particles embedded in carbon fibers that provide electrical conductivity and mechanical resistance for the electrode. The fibers were tested as a binder-free lithium-ion battery cathode within different potential ranges to evaluate insertion and conversion mechanisms and contributions to the overall capacity. Between 1.2 V and 3.5 V vs. Li/Li+, lithium intercalation provides a specific capacity up to 138 mAh∙g−1 at 0.01 A g−1 with good rate handling. When operating in a larger potential range between 0.1 V and 3.0 V vs. Li/Li+, the contribution by conversion reactions increases the capacity to 790 mAh∙g−1, but there is a fast capacity fading.
DOI der Erstveröffentlichung: 10.1016/j.jpowsour.2019.227674
URL der Erstveröffentlichung: https://www.sciencedirect.com/science/article/abs/pii/S0378775319316672
Link zu diesem Datensatz: hdl:20.500.11880/28626
http://dx.doi.org/10.22028/D291-30133
ISSN: 0378-7753
1873-2755
Datum des Eintrags: 22-Jan-2020
Fakultät: NT - Naturwissenschaftlich- Technische Fakultät
Fachrichtung: NT - Materialwissenschaft und Werkstofftechnik
Professur: NT - Prof. Dr. Volker Presser
Sammlung:SciDok - Der Wissenschaftsserver der Universität des Saarlandes

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