Fourth Power’s battery uses liquid tin and Guinness World Record-holding technology to store energy at almost half the sun’s temperature. The system converts renewable energy to heat, or thermal energy, which can be stored. A battery heats liquid tin and moves it through a piping system to heat stacks of carbon blocks until they glow white hot. When power is needed, the thermophotovoltaic cells are used to turn the light emitted by the glowing white hot plumbing system into electricity. Using readily available and less expensive materials enables electricity storage possibly ten times cheaper than lithium-ion batteries.
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