STOE coin cell battery holder.

STOE sample holder insert with battery clamp and empty coin cell to the right.

Once started at the synchrotrons, the structural in situ analysis of electrode materials during a charge-discharge cycle in battery cells using X-ray diffraction became more and more popular.

Thus, a wide variety of self-made battery cell holders in reflection or transmission geometry found their way into the laboratories over the last years, but all commercially available solutions were only built for pouch cells and mostly for Bragg/Brentano goniometers. A commercial coin cell setup for transmission geometry still had to be developed.

Based on the studies of the Institute for Materials Science of Darmstadt Uni-versity of Technology[1], the Institute for Applied Materials (IAM) at the Karlsruhe Institute of Technology (KIT) and the Leibnitz Institute for Solid State and Materials Research (IFW) Dresden[2, 3], STOE now offers such a sample holder.

The coin cell with Kapton windows can be clipped into a standard clamp which is integrated in a STOE transmission sample holder insert. The sample can be slewed to improve the counting statistics and to reduce the effects of preferred orientations, a two pole contacting to a potentiostat is provided.

The first data from a full charge-discharge cycle of a LiFePO4/Li half-cell, measured in the group of Professor A. Vlad, IMCN/MOST, UCLouvain on a STOE STADI P COMBI equipped with a Mo-tube, a Ge(111) monochromator for pure Ka1 radiation and a Dectris MYTHEN2 R 1K detector with 1 mm chip thickness, is presented in the 3D plot below.

[1] Baehtz, C., Buhrmester, Th., Bramnik, N.N., Nikolowski, K. and Ehrenberg, H., Solid State Ionics, Volume 176, 2005, 1647-1652.

[2] Herklotz, M., Scheiba, F., Hinterstein, M., Nikolowski, K., Knapp, M., Dippel, A.-C., Giebeler, L., Eckert, J. and Ehrenberg, H., Journal of Applied Crystallography, Volume 46, 2013, 1117-1127.

[3] Herklotz, M., Weiß, J., Giebeler, L. and Ahrens, E., German Patent DE102015214177B3, 2015.

LiFePO4/Li half-cell charge-discharge cycle. The provision of te data by the group of Professor A. Vlad, IMCN/MOST, UCLouvain is kindly acknowledged!

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THOMAS HARTMANN
THOMAS HARTMANN Dr.-Ing. | Application Support Powder Diffraction & Sales

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MICHAEL TECK
MICHAEL TECK M. Sc. | Application Support Powder Diffraction

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