Structure and Dynamics in Ionic Liquid and Highly Concentrated Electrolytes
The thesis focuses on the understanding of mesoscopic structure and dynamics in ILs and HCEs with the help of neutron and X-ray scattering with the aim to identify how local dynamical processes are influenced by the nanostrucutre. I have investigated an archetypal HCE system where the Li-salt LiTFSI is dissolved in acetonitrile and a model ionic liquid. Varying the Li-salt concentration in the HCE we can link the local processes to the development of the structure. The ion transport in the HCE takes place by the means of a jump diffusion and is highly dependent on the salt concentration and temperature of the system. For the ionic liquid we investigate the response of structure and dynamics to changes in both pressure and temperature with a particular focus on state points (P,T) where the macroscopic dynamics i.e. conductivity is constant. A conned diusion was found with a diusion coecient in agreement with macroscopic conductivity, thus providing a link between the microscopic and macroscopic dynamics.
Highly concentrated electrolytes
Chalmers, Fysik, Materialfysik
Density scaling of structure and dynamics of an ionic liquid
Physical Chemistry Chemical Physics,; Vol. 22(2020)p. 14169-14176
Artikel i vetenskaplig tidskrift
F. Lundin, H.W. Hansen, B. Frick, D. Rauber, R. Hempelmann, O. Shebanova, K. Niss and A. Matic Local dynamics and nanostructure of an ionic liquid under pressure as a function of temperature
F. Lundin, L. Aguilera, H.W. Hansen, B. Frick, S. Lages, A. Labrador, K. Niss and A. Matic Structure and dynamics in highly concentrated electrolytes
Sveriges Neutronforskarskola - SwedNESS
Stiftelsen för Strategisk forskning (SSF), 2016-07-01 -- 2021-06-30.
Stiftelsen för Strategisk forskning (SSF), 2017-01-01 -- 2020-12-31.
Den kondenserade materiens fysik
Chalmers tekniska högskola
Zoom, Password: 534071
Opponent: Associate Professor Heloisa Bordallo, Niels Bohr Institute, Denmark