Vanadium pentoxide/carbide-derived carbon core-shell hybrid particles for high performance electrochemical energy storage
Zeiger M, Ariyanto T, Krüner B, Peter NJ, Fleischmann S, Etzold B, Presser V (2016)
Publication Type: Journal article
Publication year: 2016
Journal
Book Volume: 4
Pages Range: 18899-18909
Journal Issue: 48
DOI: 10.1039/c6ta08900c
Abstract
A novel, two step synthesis is presented combining the formation of carbide-derived carbon (CDC) and redox-active vanadium pentoxide (V2O5) in a core-shell manner using solely vanadium carbide (VC) as the precursor. In a first step, the outer part of VC particles is transformed to nanoporous CDC owing to the in situ formation of chlorine gas from NiCl2 at 700 °C. In a second step, the remaining VC core is calcined in synthetic air to obtain V2O5/CDC core-shell particles. Materials characterization by means of electron microscopy, Raman spectroscopy, and X-ray diffraction clearly demonstrates the partial transformation from VC to CDC, as well as the successive oxidation to V2O5/CDC core-shell particles. Electrochemical performance was tested in organic 1 M LiClO4 in acetonitrile using half- and asymmetric full-cell configuration. High specific capacities of 420 mA h g-1 (normalized to V2O5) and 310 mA h g-1 (normalized to V2O5/CDC) were achieved. The unique nanotextured core-shell architecture enables high power retention with ultrafast charging and discharging, achieving more than 100 mA h g-1 at 5 A g-1 (rate of 12C). Asymmetric cell design with CDC on the positive polarization side leads to a high specific energy of up to 80 W h kg-1 with a superior retention of more than 80% over 10000 cycles and an overall energy efficiency of up to 80% at low rates.
Authors with CRIS profile
Involved external institutions
Leibniz-Institut für Neue Materialien gGmbH / Leibniz Institute for New Materials (INM)
Germany (DE)
Max-Planck-Institut für Eisenforschung GmbH (MPIE) / Max Planck Institute for Iron Research
Germany (DE)
Universität des Saarlandes (UdS)
Germany (DE)
Germany (DE)
Max-Planck-Institut für Eisenforschung GmbH (MPIE) / Max Planck Institute for Iron Research
Germany (DE)
Universität des Saarlandes (UdS)
Germany (DE)
How to cite
APA:
Zeiger, M., Ariyanto, T., Krüner, B., Peter, N.J., Fleischmann, S., Etzold, B., & Presser, V. (2016). Vanadium pentoxide/carbide-derived carbon core-shell hybrid particles for high performance electrochemical energy storage. Journal of Materials Chemistry A, 4(48), 18899-18909. https://doi.org/10.1039/c6ta08900c
MLA:
Zeiger, Marco, et al. "Vanadium pentoxide/carbide-derived carbon core-shell hybrid particles for high performance electrochemical energy storage." Journal of Materials Chemistry A 4.48 (2016): 18899-18909.
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