Berlin 2012 – wissenschaftliches Programm
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MM: Fachverband Metall- und Materialphysik
MM 17: Poster Session
MM 17.86: Poster
Montag, 26. März 2012, 17:00–19:00, Poster B
On the conductivity and chemical stability of lithium conducting glass ceramics (LICGC): Application in next generation batteries? — •Pascal Hartmann1, Marisa Reich2, Thomas Leichtweiss1, Meike Schneider2, Wolfgang Schmidbauer2, and Jürgen Janek1 — 1Physikalisch-Chemisches Institut, Justus-Liebig-Universität Gießen, 35392 Gießen, Germany — 2SCHOTT AG, Corporate Research and Technology Development, 55014 Mainz, Germany
To fullfill future requirements in terms of electrical energy storage highly reactive materials will be used as active electrode components in the so-called next generation batteries. Most of the known liquid organic electrolytes decompose in contact with these materials making them not applicable. Therefore much effort has been spent to develop inorganic solid lithium electrolytes in order to protect the organic liquids or even completely replace them. One class of materials are glass ceramics. Especially the system Li1+xAlM(PO4)3 (M = Ge, Ti,...) was intensively studied and it was claimed that these materials show a lithium ion conductivity of more than 1 mS/cm and that Ti-free samples, in addition, show good chemical stability upon reduction reactions. In this work we investigated glass ceramic materials with different ratios of Ge and Ti using electron microscopy, impedance spectroscopy, and low current polarization techniques. We show that there is a trend in terms of ionic conductivity, electronic conductivity and chemical stability upon the contents of Ge and Ti. These studies help to identify suitable material compositions to fulfill the requirements for long term stable and safe next generation batteries.