Fourth Power, Inc., a startup based in Pittsburgh, is building a thermal battery that stores surplus renewable electricity as ...

Lithium is expensive, environmentally questionable in large volumes, and tends to catch on fire from time to time. It's the best solution we've currently got for EV and device battery storage, but ...

RMIT engineers say they've tripled the energy density of cheap, rechargeable, recyclable proton flow batteries, which can now challenge commercially available lithium-ion batteries for capacity with a ...

Tell an engineer that you want a battery that’s powerful, safe, reliable, and cheap, and he’ll probably respond, “Powerful, safe, reliable, cheap: pick any two.” Today’s batteries are a compromise, ...