Ultrafast Ionic Hopping, Electron, and Phonon Correlations in Solid State Electrolytes
Abstract
A THz pump, transient extreme ultraviolet spectrometer is created to measure the picosecond Li ion hopping dynamics in a solid-state electrolyte and any resultant lattice-cage correlations. The THz pump will transiently bias the sample or resonantly drive the phonon modes that to lead to ionic hopping. The extreme ultraviolet probe, produced by high harmonic generation, measures the temporal response of the different atomic species in the lattice cage. The core-level transition gives information on both the electronic and structural dynamics. Varying the incident angle of the XUV radiation changes the penetration depth from a few nanometers to hundreds of nanometers, allowing diffusion dynamics to be measured. Specifically, how electron-ion, phonon-ion, and ion-ion correlations control ionic conductivities in different symmetry (Li7La3Zr2O12, Li10GeP2S12) and atomically substituted lattice cages (Li7La3Sn2O12, Li10SiP2S12) will be measured. Material design rules will be developed based on the short time scale processes, contributing to faster charging, safe, and compact solid-state batteries. The long wavelength pump, extreme ultraviolet probe spectrometer that is developed can quantify non-optically excited transport dynamics in an element-specific manner.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Jan 21, 2022
- Source ID
- FA95502110022XX0
Entities
People
- Scott K Cushing
Organizations
- Air Force Office of Scientific Research
- California Institute of Technology
- United States Air Force