As I have said many times before the laws of physics are not something that can be changed. and so the answer is not more exotic/rare metals based batteries but some alternative power source.
The accessories alone on a car need to be powered. Power them all up on a cold, wet night and you will need a power source just to keep the electricity flowing to them. I know.....let's add a petrol?diesel powered engine to drive a generator to create enough power for the accessories. You know the ones, lights, heater/climate control, heated front and rear windscreens, wipers, integrated entertainment and navigation system, heated seats, electric windows.
Then of course we will need a way of topping up the batteries that provide motive power for anything more than about a 40 mile journey and for motorway use. I know, another IC engine will do the trick. All very humourous but there is a long way to go yet. Oh yes and then the logistics of recharging when parked, and then the life expectancy and cost of replacement batteries.