A team of researchers in China has just pulled the curtain back on a new sodium-sulfur battery design that could fundamentally change the math on energy storage. By leaning into the very chemistry that has historically made sulfur a headache for engineers, they have managed to build a cell that is incredibly cheap to make but still packs a massive energy punch.
The design, which is currently being tested in the lab, uses dirt-cheap ingredients: sulfur, sodium, aluminum, and a chlorine-based electrolyte. In early trials, the battery hit energy densities over 2,000 watt-hours per kilogram – a figure that blows today’s sodium-ion batteries out of the water and even gives top-tier lithium cells a run for their money.
