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M: Metallphysik
M 32: Poster TU B (Symposium Tomographic Methods in Materials Research M-32.32-55)
M 32.46: Poster
Montag, 7. März 2005, 14:30–16:30, Poster TU B
Chemical processes in commercial batteries studied by synchrotron-tomography and 3D image analysis — •A. Rack1, A. Haibel1, I. Manke2, S. Zabler2, H. Riesemeier3, G. Weidemann3, J. Goebbels3, and J. Banhart1,2 — 1Hahn-Meitner-Institut Berlin, Abteilung Strukturforschung, Glienicker Str. 100, 14109 Berlin — 2Institut für Metallphysik, Hardenbergstr. 36, 10623 Berlin — 3Bundesanstalt für Materialforschung und -prüfung, Unter den Eichen 87, Haus 60, 12205 Berlin
Batteries are playing a major role in everybody’s daylife: laser pointers, walkmen, mobile telephones - all are working with a power pack. Here we are focusing on manganese-zinc batteries (type AAA/micro) as they are widely used and therefore investigations are interesting for all kind of applications. By working with the high resolution tomographic setup of the BAMline @ BESSY II we obtained 3D images of one battery in different discharging stages. Due to the use of monochromatic radiation we are able to distinguish between the different materials within our tomographic image. All chemical components are separated from the greyscaled data into Boolean images and then evaluated by 3D image analysis methods derived from stochastic geometry [1]. We can quantify the time-dependent decay of the battery’s manganese as well as changes of the zinc powder’s morphological structure.
[1] J. Ohser and F. Mücklich, Statistical Analysis of Microstructures in Materials Science, John Wiley & Sons, 2000