Gutsche, Christian and Berling, S. and Plaggenborg, Thorsten and Parisi, Jürgen and Knipper, Martin (2019) Proof of Concept of an Iron-Iron(III)oxide hydroxide Battery Working at Neutral pH. International Journal of Electrochemical Science. pp. 1566-1579. ISSN 1452-3981

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An iron-iron(III)oxide hydroxide battery working in a neutral pH range is introduced. It employs electrochemical deposition of metallic Fe at the negative electrode and FeIIIOOH at the positive electrode during charge and dissolution of both during discharge in an aqueous FeII electrolyte. The working principle was validated with cyclic voltammetry, charge-discharge cycles, weighing, profilometry, X-ray diffraction, scanning electron microscopy, and energy dispersive X-ray analysis. The coulombic efficiency over seven cycles is (49 ± 5) %, while it is (40 ± 2) % for the voltaic efficiency and (20 ± 1) % for the overall efficiency using current densities for charging and discharging of 1.2 mA cm-2 and 0.4 mA cm-2 at the negative electrode and 24 μA cm-2 and 8 μA cm-2 at the positive electrode.

Item Type: Article
Additional Information: Publiziert mit Hilfe des DFG-geförderten Open Access-Publikationsfonds der Carl von Ossietzky Universität Oldenburg.
Uncontrolled Keywords: Lepidocrocite, Low-cost battery, Neutral electrolyte, FeII; FeOOH
Subjects: Science and mathematics > Physics
Divisions: Faculty of Mathematics and Science > Institute of Physics (IfP)
Date Deposited: 18 Mar 2020 09:00
Last Modified: 16 Apr 2020 10:21
URN: urn:nbn:de:gbv:715-oops-45517
DOI: 10.20964/2019.02.37

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