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Probing Li Ion Dynamics In Amorphous Xli2so4⋅(1 − x)lipo3 by Quasielastic Neutron Scattering

Publication Type
Journal Name
Solid State Ionics
Publication Date
Page Numbers
95 to 98

The diffusion dynamics of a series of lithium sulfate substituted phosphate glass materials xLi2SO4 ⋅(1 − x)LiPO3 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 cm2 /s at 450 K. Elastic neutron scattering measurements show an alteration of the phosphate chain backbone of the glass material