Scientific Achievement: Researchers discovered that Li infiltration in solid oxide electrolytes for all-solid-state batteries is associated with local electronic structure at grain boundaries (GBs) rather than exclusively at Li-electrolyte interfaces as in Li-ion batteries.
Significance and Impact: Results identify that tailoring GBs with sufficient electronic resistivity is a promising route to mitigate Li dendrite formation in polycrystalline solid electrolytes.
DOI: 10.1038/s41563-021-01019-x
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