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Iron-Doped ZnO for Lithium-Ion Anodes: Impact of the Dopant Ratio and Carbon Coating Content

Mueller, Franziska; Gutsche, Alexander; Nirschl, Hermann; Geiger, Dorin; Kaiser, Ute; Bresser, Dominic; Passerini, Stefano

Abstract: Herein, an investigation of the impact of the dopant and carbon content in iron-doped zinc oxide/carbon composites is presented. For this purpose, a comprehensive morphological, structural, and electrochemical characterization of a series of different compounds is reported, including techniques like X-ray diffraction (XRD), transmission electron microscopy (TEM), inductively coupled plasma optical emission spectroscopy (ICP-OES), thermogravimetric analysis (TGA), specific surface area using the Brunauer-Emmett-Teller (BET) algorithm, pycnometry, small-angle X-ray scattering (SAXS), cyclic voltammetry (CV), and galvanostatic cycling. The obtained results reveal an impact of the iron-dopant content on the crystallite and particle size as well as the detailed de-/lithiation mechanism. The effect on the cycling stability, however, appears to be rather minor. The carbon coating content, on the contrary, has a significant influence on the cycling stability and rate capability. According to these results, a carbon content of about 10 wt% is sufficient to achieve stable cycling at lower current densities, while a carbon content of 15–20 wt% allows for specific capacities of 425–500 mAh g−1, when applying a specific current of 1 A g−1, for instance.

Zugehörige Institution(en) am KIT Institut für Mechanische Verfahrenstechnik und Mechanik (MVM)
Helmholtz-Institut Ulm (HIU)
Publikationstyp Zeitschriftenaufsatz
Jahr 2016
Sprache Englisch
Identifikator DOI: 10.1149/2.0171701jes
ISSN: 0013-4651, 1945-7111, 0096-4743, 0096-4786
KITopen ID: 1000063029
HGF-Programm 37.01.01; LK 01
Erschienen in Journal of the Electrochemical Society
Band 164
Heft 1
Seiten A6123–A6130
Lizenz CC BY-NC-ND 4.0: Creative Commons Namensnennung – Nicht kommerziell – Keine Bearbeitungen 4.0 International
Schlagworte anode; conversion/alloying; Li-ion; LIB; lithium-ion battery; transition metal doping; Zinc oxide
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