Unique Li deposition behavior in Li 3 PS 4 solid electrolyte observed via operando X-ray computed tomography.

The problem of lithium dendrites must be addressed for practical lithium metal all-solid-state batteries. Herein, three-dimensional morphological changes within Li 3 PS 4 electrolyte away from the anode were observed using operando X-ray computed tomography. We revealed that the electronic conduction of decomposition and the electrolyte/void interface cause the lithium deposition within the Li 3 PS 4 .