Objectif
In DIONISOS, we aim to develop new analytical relationships for ion- and heat-transport in ionic
conductors, and thus heal significant inconsistencies of the current understanding. Currently ion- and
heat transport are interpreted as unrelated phenomena; ion transport being based on local jumps,
whereas heat transport being mediated by dynamic lattice vibrations called phonons.
Among other studies, my pioneering works in the field of solid ionic conductors (J. Am. Chem. Soc.
2017, J. Am. Chem. Soc. 2018) opened discussions about plausibility-gaps in state-of-the-art
concepts, in particular regarding interactions of phonons with mobile ions. Our work has shown that
by tailoring the lattice dynamics and vibrational properties of materials, the ionic transport can be
affected, which cannot be explained well by current models.
To this end, we propose to analyze both ion- and heat-transport in several representative materials,
designed for the purpose, to test our hypothesis that it is not a classical phonon phenomenon, but
rather local vibrations, quantized by the diffuson, that dominate the heat and ionic transport in fast
ionic conductors.
DIONISOS will thus provide an in-depth fundamental understanding of how local vibrational modes
connect thermal to ionic transport, and ideally a new analytical relationship. A unified understanding
of thermal transport and ionic transport will pave the way for further research on how local structural
phenomena affect global materials properties. In addition, a theory of linking local ionic motion with
local thermal motion will be of vast value for the design of high-performance functional materials.
Champ scientifique
Mots‑clés
Programme(s)
- HORIZON.1.1 - European Research Council (ERC) Main Programme
Régime de financement
HORIZON-ERC - HORIZON ERC GrantsInstitution d’accueil
48149 MUENSTER
Allemagne