Li-ion conductivity in Li₂OHCl_1−xBr_x solid electrolytes: grains, grain boundaries and interfaces

Abstract

In this study, we conduct a comprehensive investigation of the effect of grain, grain boundary and interfacial resistance on the total Li-ion conductivity in Li2OHCl1-xBrx antiperovskite solid electrolytes. We highlight...

Fabrication of thin solid electrolytes containing a small volume of an Li3OCl-type antiperovskite phase by RF magnetron sputtering

“…However, these properties have been measured previously for Li 2 OHCl. 7,[16][17][18] The activation energy for Li + conduction in Li 2 OHCl has been found to decrease from B0.8 eV to 0.53-0.57 eV above B32 1C, which is associated with the transformation from an orthorhombic to a cubic crystal structure. The range of values reported for the ionic conductivity at B25 1C is…”

“…A shallower (B1 mm deep) holder was used for this target to improve thermal conduction and avoid melting of the Li 2 OHCl, which has a relatively low melting point (B300 1C). 16…”

“…Materials Advances very wide, with four different reports finding values of (6.83 Â 10 À9 S cm À1 ), 17 (B5 Â 10 À8 S cm À1 ), 18 (1.93 Â 10 À6 S cm À1 ) 16 and (B4 Â 10 À5 S cm À1 ). 7 Values of (B5.6 Â 10 À7 S cm À1 ), 17 (B2.5 Â 10 À6 S cm À1 ) 18 and (B1.1 Â 10 À5 S cm À1 ) 16 were measured at 50 1C.…”

“…1(b)) has already shown promising performance in several experimental studies. 7,16,17,[27][28][29][30][31] Further, Braga and co-workers have published several studies on glassy electrolytes derived from Li 3 OCl which seem to show very high Li + conductivity and some unusual, but advantageous, electrical properties. [32][33][34][35][36][37][38] Here we are concerned with crystalline Li 3 OCl since it has been studied more widely as part of the growing research effort in the field of antiperovskite solid electrolytes.…”

Synergy of non-lithium cation doping and the lithium concentration affecting lithium ion transport in solid electrolytes

“…Many factors have impacts on lithium-ion migration. 7,8 In addition to the arrangement of anions (body-centered cubic, face-centered cubic and hexagonal close-packed), 9,10 the unit volume of a single anion and the charge it carries, [11][12][13] and cations also possess very complex effects on lithium-ion migration. 14,15 On one hand, some literature studies report that the concentration of lithium ions itself has effects of nonlinear relationships on the diffusion of lithium ions, and there is generally an optimal lithium-ion concentration.…”