I really don't know about this stuff. When you look at electric cars, there hasn't been all that much progress in the last hundred plus years. Around 1900, electric cars would go the speed limit and then some, run about 100 miles and took some 8 - 10 hours to recharge. Now, you get pretty much the same with the big difference being that you used to be able to drain the batteries, clean the cases and plates, and they would last over 100 years. (Jay Leno has an early electric with most of the original batteries.) Now, the batteries have to be "recycled" after a few years at a high cost of cash and pollution. Also, if you crash, you have to immediately follow a complicated procedure to discharge the batteries or it might burn down the repair shop.
Back in the 80's, someone converted a Beech Bonanza to electric. He split the fuel tanks horizontally with flexible diaphragms and installed lithium fuel cells. The 200 HP gas engine was replaced with a 160 HP electric of about the same weight. At altitude, the electric still produced 160 HP while the original would drop off to around 120 - 140. The spent hydrogen peroxide was transfered to the bottom half of the tank where it was drained out as the upper half was refilled, so a "recharge" took the same time as refueling a standard Bonanza. The lithium could be extracted from the used hydrogen peroxide so both could be reused. The lithium bars in the fuel cells were replaced during the regular 100 hour inspection in about the same time as an oil change, so the whole setup took no more time than a gas burner.
