[1]https://www.extremetech.com/extreme/281982-fluoride-based-battery-chemistry-c
ould-leapfrog-replace-lithium-ion

   Just heard about this yesterday.  Sounds promising.

               Jim Bell

References

   1. https://www.extremetech.com/extreme/281982-fluoride-based-battery-chemistry-could-leapfrog-replace-lithium-ion