From your article: >reportedly uses single crystals of lithium cobalt oxide Would anyone like to guess why this one didn't catch on? Anyway, practically all

From your article: >reportedly uses single crystals of lithium cobalt oxide Would anyone like to guess why this one didn't catch on? Anyway, practically all modern solid-state batteries are based on a phosphorus sulfide electrolyte system (P2S5, but also related PxSy phases), which was tested in batteries as early as 1988 by Eveready: https://www.sciencedirect.com/science/article/abs/pii/S0167273888801565 https://www.sciencedirect.com/science/article/abs/pii/S01672... The material was discovered in France in around 1980: https://www.sciencedirect.com/science/article/abs/pii/016727388090048X https://www.sciencedirect.com/science/article/abs/pii/016727... So this is not just a one-off technology; the challenge is mostly efficient production.