While lithium extraction technologies generally focus on ways to get the essential metal out of the ground, there's another source to mine: existing batteries that no longer work. A new technique could now make that process economically viable.
What’s more, the researchers say the method is much more affordable than other battery-based lithium-harvesting techniques, costing about US$12.70 per kilogram of lithium recovered.
Indeed, according to Daily Metal Prices, lithium costs $13.17 per kilo on the open market as of the time of writing. So this method actually comes out cheaper than just buying the stuff.