The big problem with electric cars isn't technological. It's economic. And one's just as defeating as the other, if the object is to come up with an electric vehicle that's more than just a cute plaything for a handful of over-rich Hollywood celebs.
Consider GM's EV-1 of the 1990s.
It was a snarky looking two-seater straight out of Buck Rogers in the 25th Century. Worked pretty well, too -- despite what you might have read. True, its range on a single charge-up was only about a fourth of what the typical IC (internal combustion) conventional car could manage -- about 70 miles or so. But that impediment was more psychological than meaningfully functional.
How many of us, after all, drive 70 miles one-way on a regular basis? Even a long commute isn't that long. More like 20-30 miles, for most of us. Right? And even if you push the envelope and the trip's close to the thing's max range, if it's a commute to work, you don't need to go anywhere for hours once you've parked and plugged in. Yes? So the beast would be fully recharged for the trip home.