Corn Ethanol is solar-powered, as all the CO2 was absorbed from the air as the corn grew thanks to photosynthesis
Nope, that's bullshit. Biomass is only co2-neutral if it grows on its own and is used up on the spot.
There’s also Hydrogen -> Syngas -> Kerosene, a process of electrification to Hydrogen + CO2 -> Fuel.
So while I pay an amount X for electricity to load a battery you are wiliing to pay 5 times as much for eFuels just to support your strange political views? That's in some way commendable...
So you gotta keep your mind open to all the possibilities that science can provide, including chemistry.
Even an open mind can't cheat thermodynamics
Why would I when we were talkiong about cars? Sure, you will need some synthetic fuel for air travel. But if you want to pay the same sums to power your car, when you could do it for a fraction of that cost that's still stupid.
No, you can actually build batteries from very simple materials that are far more efficient that fuel production and then burning it (both times with a huge loss). Just because the world focussed on lithium-ion batteries in the last decades (because of small portable devices where energy density was key) and thus used what was already widely available for cars in the beginning, rare materials for car batteries are not actually a requirement.
That also a big nope. In reality solar and wind can power the world through the day, wind can power the world through the night. The only storage needed for a day/night cycle is a small fraction fo the prodcution. Just enough to shift parts of the production peaks at the afternoon and in the middle of the night ~5 hours forward to the consumption peaks in the evening and early morning.
And don't let me even start with how cheap you can produce massive batteries if you don't care for energy density at all because no one gives a fuck if the warehouse-sized installation for your town or city district is 20% bigger and a few tons heavier. Quite the opposite actually... Li-ion batteries nowadays are incredible bad for such a task. We accept their bad thermal properties in our smartphones and laptops, in cars it's already a drawback that prompted the development of other materials that are already serial produced. For fixed storage they would basically be a unneccessary fire hazard.
The real drawback of H2 availability. You lose energy to produce it. You lose more energy when you consume it. You will never see cheap H2 as the production is just too inefficient, so there will only be demand in sectors that simply cannot be electrified (air transport, some industries) as well as in chemical production as a raw material and for long-term seasonal storage.
Again... if you want to compete with high-energy demanding industries for the gas to power your car, that's your decision. Everyone else will use batteries for less than a ¼ of the cost. If your ICE is worth it for you, go for it. But don't pretend that the world will collectively decide to use a mode of transportation needing 4-5 times as much energy just for laughs and giggles.