The interface matters

Solid-state electrolytes are more efficient and durable than the liquid electrolytes used in commercial batteries, but the tendency of Li to form dendrites that extend into the electrolyte and eventually short-circuit the cell is an obstacle for their development. Writing in Nature Materials, Naga Phani Aetukuri and collaborators shed light on the mechanisms underlying dendrite formation in solid-state batteries and show that the use of a well-chosen metallic interlayer at the electrode–electrolyte interface can mitigate dendrite growth.

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