Solid‐State Electrolytes: Revealing the Short‐Circuiting Mechanism of Garnet‐Based Solid‐State Electrolyte (Adv. Energy Mater. 21/2019)

In article number 1900671, Feng Pan and co-workers investigate the short-circuiting mechanism of garnet Li7La2.75Ca0.25Zr1.75Nb0.25O12 (LLCZN). Instead of propagating uniaxially from one electrode to the other in a dendritic form, metallic lithium is formed within the solid electrolyte. It is found that the grain boundaries of LLCZN provide electron pathways, which allow Li+ to be reduced by electrons into metallic Li.