You might want to read the paragraph again." Could.“. " Great promise.”
Yeah everyone’s prototypes have great promise, why don’t you try making them into a commercially viable product and then compare the real numbers?
It’s not like this is the first country that’s created a solid state battery, they’re pretty late to the game.
That seven dollars is a hypothetical cost of raw materials alone. The lowest cost they have of a viable solid state batteries is $50 and that’s from the US.
The $200 is from a theoretical upper cost of specifically the most expensive material somebody could use to make expensive ceramic batteries, ignoring the actual costs and materials of solid state batteries other countries and companies are using, except to say that those prices aren’t important because they aren’t commercially viable - problem is, that part of the article is incorrect as well. There are dozens of companies already making solid state batteries, nowhere near $200 per kilogram of raw material, more like $75 per produced commercially viable kilowatt hour (Nissan).
But 75 is higher than 7, you might say. $7 is an unverified lab while other companies and countries have actually produced what state batteries, publishing the actual cost, rather than silly self-congratulating imaginary numbers.