Probing Li ion dynamics in amorphous xLi 2 SO 4 ⋅(1 − x)LiPO 3 by quasielastic neutron scattering
Abstract
The diffusion dynamics of a series of lithium sulfate substituted phosphate glass materials xLi 2 SO 4 ⋅(1 − x)LiPO 3 has been probed by quasielastic neutron scattering. Amorphous Li ion conductors are attractive as electrolyte materials for all-solid state batteries because they are highly isotropic and chemically stable. Local disorder is expected to reduce barriers to ion migration – leading to improved ionic conductivity relative to their crystalline counterpart – while minimizing unwanted electron transport. We report Li self-diffusion in these materials on a length scale comparable to the interatomic spacings, obtaining values D ≃ 55 ± 4 × 10 −8 cm 2 /s at 450 K. Elastic neutron scattering measurements show an alteration of the phosphate chain backbone of the glass material.
Department(s)
Physics, Astronomy, and Materials Science
Document Type
Article
DOI
https://doi.org/10.1016/j.ssi.2019.02.004
Keywords
Li diffusion, Quasielastic neutron scattering, Solid electrolyte
Publication Date
6-1-2019
Recommended Citation
Heitmann, Tom, Gavin Hester, Saibal Mitra, Thomas Calloway, Madhu Sudan Tyagi, Andrew Miskowiec, Souleymane Diallo, Naresh Osti, and Eugene Mamontov. "Probing Li ion dynamics in amorphous xLi2SO4⋅(1− x) LiPO3 by quasielastic neutron scattering." Solid State Ionics 334 (2019): 95-98.
Journal Title
Solid State Ionics
