Firstly,I'm no scientist ,last things first, the price of petrol goes up and down like a Yo-Yo.
One of the major benefits of going electric is a constant price,has to be major plus.
I refer you to this article, IMHO we're very close to solving all outstanding issues with Graphene SuperCapacitors vis-vis electric vehicles.
Kannappan and co have measured the performance of their supercapacitor and are clearly impressed with the results. They say it has a specific capacitance of over 150 Farrads per gram can store energy at a density of more than 64 watt-hours per kilogram at a current density of 5 amps per gram.
That’s almost comparable with lithium-ion batteries, which have an energy density of between 100 and 200 watt-hours per kilogram.
These supercapacitors have other advantages too. Kannappan and co say they can fully charge them in just 16 seconds and have repeated this some 10,000 times without a significant reduction in capacitance. “These values are the highest so far reported in the literature,” they say.
Here is a “wow’’ statement from Muzzin on where the SER/Monash work is at: “Our super cap technology is smaller, better and faster than any other published technology. The technology has energy density 1000 times greater and 50 times higher capacitance over our competitors, and has essentially unlimited cycle life.”
And here is another: “We are developing planar super capacitors with massive energy and power density which could surpass the delivery power of lithium ion batteries.”
" Its all in the focused Ion beam process"
Graphene has a melting point around 4900 K degrees,the problem you mention,should be easily addressed IMHO.
