Since the pioneering work of Liang in 1973 nano- or mesostructured composites consiting of an insulator and an ionically conducting phase act as model systems helpful to understand interfacial transport properties. (7)Li and (19)F NMR revealed details of the diffusion mechanism in LiF:alumina composites. Link to J. Phys. Chem. C
In a collaborative publication of researchers of the Chinese Academy of Sciences, the South China Normal University, Austrian company Anton Paar GmbH and the Trimmel group non-fullerene polymer solar cells with a high efficiency of 13.3% were disclosed in Chemistry of Materials. The success is based on properly selecting and processing donor–acceptor pairs with suitable electronic properties and complementary optical absorption.
A new paper has been published by the Rettenwander group about single-crystal X-ray diffraction to study the nature of Li+/H+ exchange in cubic Li7La3Zr2O12 (LLZO) garnets. On the basis of the proton concentration change over time (3 years), a spherical diffusion model was used to estimate the proton diffusion coefficient to be of the order of 2 × 10–17 m2/s. This diffusion coefficient is high enough to have a significant impact on both the cell performance and safety when LLZO is used as a protecting layer for Li metal anodes in Li-ion batteries that rely on liquid electrolytes. Link to JPCC.
We seek to fill a PhD student position (30 h/week) in our research group in the course of March 2019. Topics: Solid-State Chemistry and Electrochemistry, new solid electrolytes, safety of all-solid-state batteries, spectroscopic methods (NMR, impedance spectroscopy, GPCL, GITT, etc.) You have a M.Sc. degree, Diploma or equivalent in Inorganic/Analytical Chemistry, Physical Chemistry or related areas, strong interest in Solid-State Physical Chemistry and application-oriented research. Contact: wilkeningnoSpam@tugraz.at or hanzunoSpam@tugraz.at
A new paper about 2D F anion diffusion in nanocrystalline RbSn2F5 that has been prepared by a mechanochemical approach is out. We used broadband conductivity spectroscopy and nuclear magnetic relaxation to show that F preferably diffuses between the Rb-Sn layers. Analyzing the NMR relaxation rates with a spectral density function developed for 2D diffusion yields a consistent picture about F dynamics. This spectral density function has been introduced by P. M. Richards in 1978. Link to PCCP.
...has been published by Thomas Rath et al. Dr. Rath assembled an interdisciplinary team for realizing his latest paper on ligand-free preparation of polymer/CuInS2 nanocrystal films and employing this strategy for improving the performance of solar cells. The work appeared as open access article in Journal of Materials Chemistry C.
The Trimmel group realized an new synthesis route towards copper indium sulfide (CuInS2) nanocrystals with a size of 3–4 nm and a chalcopyrite crystal structure starting from copper and indium xanthates as precursors in a hot injection synthesis performed at a temperature of 200 °C and used the material as acceptor in polymer/nanocrystal bulk heterojunction solar cells. The work has been published in New Journal of Chemistry as an open access arcticle.