Electrochemical performance of single crystal belt-like NH4V3O8 as cathode material for lithium-ion batteries
NH4V3O8 with belt-like morphology has been synthesized via a hydrothermal process, using acetic acid as acidulant. The resulting phase-pure NH4V3O8 microcrystals have smooth surfaces and are typically 25-45μm long, 2-15μm wide, and 0.6-1.2μm thick. Electrochemical studies by means of cyclic voltamme...
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| Hauptverfasser: | , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
15 June 2015
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| In: |
Electrochimica acta
Year: 2015, Jahrgang: 174, Pages: 682-687 |
| ISSN: | 1873-3859 |
| DOI: | 10.1016/j.electacta.2015.06.027 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1016/j.electacta.2015.06.027 Verlag, lizenzpflichtig, Volltext: http://www.sciencedirect.com/science/article/pii/S0013468615013985 
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| Verfasserangaben: | A. Ottmann, G.S. Zakharova, B. Ehrstein, R. Klingeler |
| Zusammenfassung: | NH4V3O8 with belt-like morphology has been synthesized via a hydrothermal process, using acetic acid as acidulant. The resulting phase-pure NH4V3O8 microcrystals have smooth surfaces and are typically 25-45μm long, 2-15μm wide, and 0.6-1.2μm thick. Electrochemical studies by means of cyclic voltammetry and galvanostatic cycling show that the pristine material is a suitable host for reversible Li+ de-/intercalation. Analysis of the peak currents from cyclic voltammetry by means of the Randles-Sevcik equation suggests that the Li+ de-/intercalation is diffusion-controlled with D∼5·10−15cm2s−1. The maximum discharge capacity, at 20mAg−1, amounts to 299mAhg−1. At 90mAg−1, it is still 201mAhg−1 with a capacity retention of 90% in the 100th cycle, indicating the belt-like NH4V3O8 being a promising candidate for application as cathode material in secondary lithium-ion batteries. |
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| Beschreibung: | Gesehen am 25.06.2020 |
| Beschreibung: | Online Resource |
| ISSN: | 1873-3859 |
| DOI: | 10.1016/j.electacta.2015.06.027 |