Dresden 2006 – scientific programme

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DF: Dielektrische Festkörper

DF 5: Glass I (together with division ‘Dynamics and Statistical Physics’ [DY])

DF 5.2: Talk

Tuesday, March 28, 2006, 10:10–10:30, M{\"U}L Elch

Nanostructured Solid Electrolytes analyzed by Time-Domain Electostatic Force Spectroscopy — •Ahmet Taskiran¹, Andre Schirmeisen¹, Harald Fuchs¹, Bernhard Roling², Hartmut Bracht³, Frank Natrup², and Sevi Murugavel² — ¹Physikalisches Institut, Wilhelm-Klemm-Str.10, 48149 Münster, Gemany — ²Institut für Physikalische Chemie, Corrensstr..30, 48149 Münster, Gemany — ³Institut für Materialphysik, Wilhelm-Klemm-Str.10, 48149 Münster, Gemany

Ion conducting solid materials are widely used as solid electrolytes in, e.g,. batteries. An important prerequisite for further progress in this field is a better understanding of ion transport mechanisms on nanoscopic length scales. We are using an atomic force microscope (AFM) operated in the non-contact mode for electrostatic force spectroscopy to measure the ion conductivity in nanoscale volumes of homogeneous and heterogeneous solid electrolytes. The measurements are carried out at sample temperatures ranging from 200 K to 675 K and at different positions on the sample. The relaxation times at different temperatures follow the Arrhenius model,which yield the activation energy of the ion hopping processes [1]. Furthermore the local variation of the relaxation strength provides us with information on the different phases and interfaces in the sample. In our work we focus on nanostructured solid electrolytes. We find that the activation energies for the ions in the nanocrystallites and in the glass regions are different, in agreement with macroscopic results [2]. [1] Schirmeisen et al., Appl.Phys.Lett. 85,2053 [2] Roling et al., Phys.Chem.Chem.Phys. 7,1472