All-iron flow batteries hold immense potential due to...cheap, abundant iron and safe, water-based electrolytes. However, the path to the market has been blocked by technical instability on the battery’s negative side.

In these systems, the active materials tend to degrade and leak through the membrane, a process that rapidly wears out the battery and limits its practical lifespan.

To overcome existing hurdles, the Chinese team employed a “synergistic design” at the molecular level, engineering a specialized iron complex that serves as a double-layered defense.

those guys really have everything under control...amazing. in other news, the US is firing science people (probably to give more money to israel)