Probing Li ion dynamics in amorphous xLi 2 SO 4 ⋅(1 − x)LiPO 3 by quasielastic neutron scattering
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.
Physics, Astronomy, and Materials Science
Li diffusion, Quasielastic neutron scattering, Solid electrolyte
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.
Solid State Ionics