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doi:10.22028/D291-28898
Titel: | Vanadium (III) Oxide/Carbon Core/Shell Hybrids as an Anode for Lithium-Ion Batteries |
VerfasserIn: | Budak, Öznil Srimuk, Pattarachai Tolosa, Aura Fleischmann, Simon Lee, Juhan Hieke, Stefan W. Frank, Anna Scheu, Christina Presser, Volker |
Sprache: | Englisch |
Titel: | Batteries & supercaps |
Bandnummer: | 2 |
Heft: | 1 |
Startseite: | 74 |
Endseite: | 82 |
Verlag/Plattform: | Wiley |
Erscheinungsjahr: | 2019 |
Dokumenttyp: | Journalartikel / Zeitschriftenartikel |
Abstract: | We present a facile two‐step synthesis of vanadium (III) oxide/carbon core/shell hybrid material for application as lithium‐ion battery electrode. The first step is a thermal treatment of a mixture of vanadium carbide (VC) and NiCl2 ⋅ 6H2O at 700 °C in an inert gas atmosphere. Elemental nickel obtained from decomposing NiCl2 ⋅ 6H2O served as a catalyst to trigger the local formation of graphitic carbon. In a second step, residual nickel was removed by washing the material in aqueous HCl. By replacing NiCl2 ⋅ 6H2O with anhydrous NiCl2, we obtained a hybrid material of vanadium carbide‐derived carbon and a vanadium carbide core. Material characterization revealed a needle‐like morphology of the rhombohedral V2O3 along with two carbon species with a different degree of graphitic ordering. We varied the NiCl2 ⋅ 6H2O‐to‐VC ratio, and the optimized material yielded a capacity of 110 mAh ⋅ g−1 at 2.5 A ⋅ g−1 which increased to 225 mAh ⋅ g−1 at 0.1 A ⋅ g−1 after 500 cycles in the potential range of 0.01‐3.00 V vs. Li/Li+. This enhanced performance is in stark contrast to the loss of lithium uptake capacity when using commercially available V2O3 mixed with carbon black, where 93 % of the initial capacity was lost after 50 cycles. |
DOI der Erstveröffentlichung: | 10.1002/batt.201800115 |
URL der Erstveröffentlichung: | https://onlinelibrary.wiley.com/doi/full/10.1002/batt.201800115 |
Link zu diesem Datensatz: | hdl:20.500.11880/27801 http://dx.doi.org/10.22028/D291-28898 |
ISSN: | 2566-6223 |
Datum des Eintrags: | 17-Sep-2019 |
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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