the improvements have been minor in battery tech... the main improvement has been in lowering energy use in the chips (shrinking mainly)
Flatly contradicted by comparing old batteries with new, amp hours vs. volume and mass. For the past couple decades, batteries have doubled in energy density once every 8 years or so. Do you perchance have an old cell phone lying around at home? Check out its amp-hour rating and see how big/heavy it is compared to the amp hour rating and size/mass of your current cell phone's battery.
and the article say's nothing about 10x, so yes this is bullshit..
No, it is not. The maximum theoretical energy density of li-air is about 10x that of the maximum theoretical for LCO/graphite li-ion.
The problem is chemistry, no matter how much you want to believe it's possible to make a battery that is anywhere near as energy dense as gasoline, the chemistry say's no!!
Once again, false. The maximum gravimetric energy density for li-air is comparable to gasoline (12kWh/kg vs. 13kWh/kg) in the charged state, and significantly better in the discharged state. Now, you don't ever achieve the maximum for a particular chemistry, or even close to it. But then again, for a given amount of EV range, you don't have to, as electric drivetrains are 3-5x more efficient than ICE drivetrains.
Of course, neither of these are actual impediments to EV adoption; nobody gives a rat's arse whether a battery pack is physically larger or heavier than a gas tank (partially or completely offset by the reduced drivetrain mass). The real impediment is price. That said, if cost per unit mass/volume remains the same and energy density improves, then cost per watt hour improves as well.