Anyway, I am amazed you really need me to spell this out for LFP:
I only need you to understand what I'm saying.
it's quite a well-known chemistry, surely you've read about it? You know, cheaper, more durable, many more charge cycles, greater fire resistance, no M or Co thus no risk of conflict minerals, lower power density than NMC but not too bad, etc etc. Used in the R1T, the Mach E, the M3 & Y, loads of BYDs, etc
By far the biggest complaints levied against EVs come from the low energy density of the batteries (weight, size, distance.) This is going exactly in the opposite direction. It's also not cheap enough to make low end EVs competitive with petroleum cars, even in developing economies. Mach E and Model 3 and Model Y it was only ever sold in the budget, lower range version of each. R1T is a pretty big car, even for a truck. Yet rangewise it's barely competitive with the much smaller Model S. Unless you're going to pack a massive battery pack on an even more massive car, or you intend on making an even lower range Nissan Leaf, I don't see the benefit.
For sodium: there's been models in mass production since late 2023, including the Yiewei 3 and the JMEV EV3. Sodium's obvious massive advantage is that it's much cheaper due to sodium's enormous abundance cf Li. But there's also a lower fire risk, lower impact of extraction cf Li, no conflict minerals, many more charge cycles even than LFP, etc. But lower power density than Li chemistries
Just as above, you'd have a point for this if the topic was grid power storage.
For semi-solid state: the first mass produced car is the MG4 Anxin Edition. It's an LiM chemistry similar to the LMR chemistry you touted, but it's coming in mid 2026 in global markets, a full two years before the chemistry you described, and the production car is already finalised.
A couple of things to unpack here:
- The energy density of this car's batteries is claimed to be 180Wh/kg. That's less than what people driving around in Teslas right now already have.
- This was already supposed to be shipping by now
- Another Chinese company already shipped what it advertised as a solid state battery. Only it isn't. But they're still allowed to do that in China anyway.
If the underlying tech does what it claims to do and comes next year rather than three years from now, then you're almost getting somewhere due to the other advantages of lithium polymer, though we've still not seen any improvement in energy density.