Mateo Jaramillo sees the future of renewable energy in thousands of iron pellets rusting away in a laboratory in Somerville, Massachusetts. Subscribe to read this story ad-free Get unlimited access to ...

Conventional lithium-ion batteries contain problematic substances such as nickel and cobalt, and the solvents used to coat the electrode materials are also toxic. Conventional lithium-ion batteries ...

Salt and rust — the bane of your car's existence — may be the keys to storing enough renewable energy to power the electric grid for several days. That's according to two local companies that have ...