hydrogen storage materials; ionic mobility; Hydrogen Storage; Complex Hydrides; Hydrogen Dynamics
Borgschulte A, Jain A, Ramirez-Cuesta AJ, Martelli P, Remhof A, Friedrichs O, Gremaud R, Zuttel A (2011), Mobility and dynamics in the complex hydrides LiAlH4 and LiBH4, in FARADAY DISCUSSIONS
, 151, 213-230.
Mauron Philippe, Bielmann Michael, Remhof Arndt, Züttel Andreas (2011), High-pressure and high-temperature x-ray diffraction cell for combined pressure, composition, and temperature measurements of hydrides, in Review of Scientific Instruments
, 82, 065108-1-065108-7.
Martelli P, Remhof A, Borgschulte A, Ackermann R, Strassle T, Embs JP, Ernst M, Matsuo M, Orimo SI, Zuttel A (2011), Rotational Motion in LiBH4/LiI Solid Solutions, in JOURNAL OF PHYSICAL CHEMISTRY A
, 115(21), 5329-5334.
We apply for the continuation of the project “Hydrogen Dynamics in Complex Hydrides”, project number SNF 200021-119972/1 for another 12 month. In the continuation of the ongoing project we propose to investigate the hydrogen dynamics in halide stabilized LiBH4 with respect to potential applications as solid state electrolytes. The continuation of the project allows the successful termination of the PhD work of Pascal Martelli.Due to its large hydrogen content of 18 mass% H2 and due to its hydrogen sorption reversibility, LiBH4, is one of the most studied complex hydrides so far. At ambient conditions, it forms an ionic crystal, consisting of Li+ and BH4- ions. It undergoes a structural phase transition from the low temperature (LT) orthorhombic phase to the high temperature (HT) hexagonal phase at 383K Triggered by the phase transition the ion conductivity increases by almost three orders of magnitude from 5?10-6 S/cm to 2?10-3 S/cm. Stabilization of the HT phase of this compound by addition of lithium halides results in an enhanced conductivity also at room temperature. Up to now, the origin of the phase transition, and therefore the role of the halides as stabilizing agents are not understood. Also the influence of the rapid localized motion of the BH4 anion on the Li-conductivity is not known so far. We propose to investigate the effect of lithium halides on the example of LiI on the hydrogen dynamics and on the thermodynamic properties of LiBH4