https://insideevs.com/news/448119/solid ... ion-assbs/
The ten-layer ASSB pouch cells offer 320 Wh / kg and 30 percent less mass than 18650 cells.
We have already told you how Solid Power believes it has the answer for solid-state cells with its sulfide technology. Although it expects to sell its all-solid-state batteries (ASSB) by 2021, automotive applications would just happen by 2026. The good news is that the company is already producing the first generation of its ASSB. Even as prototypes, they already present many advantages compared to 18650 NMC cells.