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Solid-state vs lithium ion batteries?

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How about a really giant Tesla Solid State Battery factory..
Toyota By-Passing Lithium for Solid State Batteries

Toyota Bets On Solid-State Batteries for 2020


Toyota Motor Corporation has been trying to
avoid the use of lithium-ion batteries as much as possible
due to their high cost. However, the company
does use them for the Prius Plug-in Electric Vehicle and the RAV4 EV.
But it has said that it is now betting on
solid-state and lithium-air batteries for use in electric vehicles by 2020.

“As Toyota anticipates the widespread use of electric vehicles in the future,
we have begun research in developing next-generation secondary batteries
with performance that greatly exceeds that of lithium-ion batteries,” Toyota writes.
It seems a lot of progress is being made in the field of electric vehicle batteries.
What do you think of these two options?

Toyota Bets On Solid-State Batteries for 2020

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If they can make it work, great. But I don't exactly trust Toyota's judgement, they are pushing FCV technology while claiming that lithium ion batteries are too expensive.

Lithium ion technology isn't perfect, but it is good enough today to be in worthwhile vehicles, and if the price continues to drop as expected, it will be good enough for use in more economical vehicles. We should not be sitting around waiting for a new technology to solve all our problems. Even if we assume that solid state batteries will be better in 2020, we still need to build our infrastructure to better suit EVs, we still need to eradicate the misconceptions about the technology, and we need to replace as many dinosaur burners for the ten or so years until the new batteries become prevalent in the mass market.
 
Toyota is a mega corporation. They spend R&D dollars on pretty much everything under the sun. I assume they like solid state because it does not use the flammable liquid electrolytes utilized in Li-ion while making use of the same anodes/cathodes. Thus they are inherently safer and do not require for example any cooling at the pack level. This means higher pack energy density even if the energy density per cell might be lower.

The drawbacks with the technology is the slower diffusion through the solid state electrolyte as opposed to the liquid electrolyte (lower power). Time will tell how far they get with it.
 
Mark Hibben says no threat to Tesla within the next 10 years from new battery technology.

It is what most of us here on TMC have been saying.

Success in the lab then at minimum five years of testing before an OEM mass markets an EV with them.

Mr Hibben points out all the OEMs have tested new technologies like fuel cells nickel metal hydride lithium ion for at least 10 years before actually putting the technology into a mass market vehicle. Not only testing the batteries for durability and safety but scalability for mass production.

The idea that a solid state startup will show lab success tomorrow then GM is going to go head to head with solid state battery EVs against Model 3 in 2017 is almost ludicrous.

This is some of the nonsense TSLA bears have been peddling. That the GF is a dangerous gamble because one of these startups will give the tech to one of the OEMs to leapfrog Tesla since Tesla is wedded to lithium-ion.