
Tesla went with energy density but the need to cool the batteries as well as a possibility of explosion came with than energy density.
There is a somewhat less energy dense lithium battery with no such cooling needs or risk of explosion, however, that is making tremendous inroads in certain areas. That would be LiFePo4, lithium iron phosphate.
I’m not aware of any OEM manufacturers using LiFePo4 yet outside of electric bicycles, but it’s very popular for custom-built electric vehicles as well as retrofit into RV’s that have been converted to solar.
The 787 uses large packs of lithium batteries. They had problems at first, but seem to be OK since a redesign. 787’s fly an incredible amount of miles each day.
... because, you know... gas-powered vehicles NEVER catch fire.