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Main Title: An X-ray tomographic study of rechargeable Zn/MnO2 batteries
Author(s): Osenberg, Markus
Manke, Ingo
Hilger, André
Kardjilov, Nikolay
Banhart, John
Type: Article
Language Code: en
Abstract: We present non-destructive and non-invasive in operando X-ray tomographic investigations of the charge and discharge behavior of rechargeable alkaline-manganese (RAM) batteries (Zn-MnO2 batteries). Changes in the three-dimensional structure of the zinc anode and the MnO2 cathode material after several charge/discharge cycles were analyzed. Battery discharge leads to a decrease in the zinc particle sizes, revealing a layer-by-layer dissolving behavior. During charging, the particles grow again to almost their initial size and shape. After several cycles, the particles sizes slowly decrease until most of the particles become smaller than the spatial resolution of the tomography. Furthermore, the number of cracks in the MnO2 bulk continuously increases and the separator changes its shape. The results are compared to the behavior of a conventional primary cell that was also charged and discharged several times.
Issue Date: 21-Aug-2018
Date Available: 13-Sep-2018
DDC Class: 600 Technik, Technologie
Subject(s): alkaline manganese batteries
X-ray tomography
in operando
in situ
zinc powder
Sponsor/Funder: DFG, TH 662/19-1, Open Access Publizieren 2017 - 2018 / Technische Universität Berlin
Journal Title: Materials
Publisher: MDPI
Publisher Place: Basel
Volume: 11
Issue: 9
Article Number: 1486
Publisher DOI: 10.3390/ma11091486
EISSN: 1996-1944
Appears in Collections:FG Struktur und Eigenschaften von Materialien » Publications

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