I need someone to post again the "so you invented a new battery technology list" with 30 possible failings. Expensive, low power density, toxicity, explosive, I can't remember them all.
It may fit with ideas for seasonal storage with aluminium as in https://news.ycombinator.com/item?id=26463249
Also 10000 cycles with 1% loss is great. Typed from a macbook showing 1000 cycles and 29% loss. It's a considerable annoyance with li-ion that they degrade like that.