Battery tech is one of the developmental fields I’m most interested in, and this news is why:

Swedish battery-maker Northvolt announced proudly on Tuesday that it had developed a new kind of sodium-ion battery that’s just as efficient as batteries that use precious earth metals like lithium, cobalt, and nickel, but is totally free of them.

The electrification of everything means the batterification of many things. In order for that to be sustainable, we need more than one battery formula. Especially when the current formula is just replacing oil with rare earth metals.