Using LiBH4 as an example we will discuss how the properties of solid electrolytes can be modified by forming nanocomposites with metal oxides, leading to an enhancement of the room temperature ionic conductivity of more than three orders of magnitude[2]. DSC measurements combined with solid state NMR allow to identify how the nanoconfinement and presence of interfaces modify the phase stability and the Li+ mobility [3]. Systematic studies show how the ionic conductivity can be optimized by tuning the nanostructure and interfaces in these nanocomposites. Finally, promising results have been obtained in using these materials as solid-state electrolytes in next generation all-solid state lithium-sulphur batteries. [4]
[1] de Jongh et al. J. Appl. Phys. A (2016), 122:251.
[2] Blanchard et al., Adv. Funct. Mater. 25 (2015), 182.
[3] Verkuijlen et al., J. Phys. Chem. C 116 (2012) 22169.
[4] Blanchard et al, J. Electrochem. Soc. (2016).