The origin of chemical inhomogeneity in garnet electrolytes and its impact on the electrochemical performance

Abstract

<p>The interface between solid electrolytes and lithium metal electrodes determines the performance of an all-solid-state battery in terms of the ability to demand high power densities and prevent the formation...</p>

Suppressing void formation in all-solid-state batteries: the role of interfacial adhesion on alkali metal vacancy transport

“…For the LLZO family of materials it has been demonstrated that the intrinsic charge transfer resistance across the Li/LLZO interface is very small once contaminant layers have been removed. 17,19,20,21 Analogously, in the Na ''alumina system, the removal of hydroxyl and carbon contaminants through heat treatment in an inert atmosphere was found to lead to very small (<10 cm 2 ) interfacial Ω resistances with Na metal. 12 Improvement of the wetting between alkali metals and SSE surfaces has been achieved in several studies through the addition of a thin, metallic interlayer phase.…”

Establishing Ultralow Activation Energies for Lithium Transport in Garnet Electrolytes

“…We plan to report on dopant segregation at the grain boundaries elsewhere. 41 This phase segregation would also explain the low capacitance obtained for the grain boundary process and the variability of results in the literature for grain boundary contributions in garnets, since different dopants and processing methods would lead to different grain boundary composition and performance. As previously reported, Al tends to concentrate at the grain boundaries of LLZO as a result of liquid-phase sintering, 12,42 promoted by the diffusion of Al from Al 2 O 3 crucibles.…”

An In Situ Temperature-Dependent Study of La2O3 Reactivation Process

“…The rare earth lanthanum is contained in a wide and important class of oxidation catalysts and electrocatalysts such as perovskites and MOF (Alcalde-Santiago et al, 2020;Lee, 2020;Karuppiah et al, 2021). These materials can be used as deep oxidation catalysts for a wide range of environmental applications (Hu et al, 2021;Ishisone et al, 2021;Le et al, 2021), which include membrane materials, electrocatalytic materials (Brugge et al, 2020), and materials in solid oxide fuel cells (SOFCs) (Duan et al, 2020). La 2 O 3 is also widely used in materials applications, such as optical glasses, light-emitting materials, laser materials, and hydrogen storage materials (Dong et al, 2020;Le et al, 2021).…”

“…Both the surface and bulk properties could be affected by these compositional changes. For most of these materials, La compounds are found on the surface (Vovk et al, 2005;Brugge et al, 2020;Duan et al, 2020;Sun et al, 2020;Hu et al, 2021;Ishisone et al, 2021;Le et al, 2021). Many of surface species of this group of materials are not stable under the operation conditions (Sunding et al, 2011;Li et al, 2019).…”