Highlighting the formation of cracks in silicon-based casted electrodes during first lithiation and delithiation in solid-state batteries.

Understand the alloying-dealloying mechanism of silicon-based anodes in solid-state batteries and its limitation, especially mechanical degradation resulting from the important volume variation when cycling, and the high internal stress it generates. The target is to visualize in-operando the formation and propagation of cracks through the first cycle, and a few post mortem analyses after more than 1 cycle to compare. All of the samples are prepared and cycled in the Lepmi 3mm cell.