MIT-born battery refuses to catch fire under 3,600°F torch, promises 10,000 cycles

MIT spinoff PolyJoule unveiled a third-generation organic battery chemistry with a conductive polymer cathode and liquid salt electrolyte.

In a demo, a full-size cell was hit with a 3,600°F propane torch and self-extinguished once the flame was removed.

The company says the design avoids thermal runaway and can last more than 10,000 cycles.

If it scales, the technology could make grid and building-scale storage safer and less reliant on flammable materials or complex cooling.