Scientists led by the University of Calicut in India fabricated a zinc-iron redox flow battery that demonstrated discharge voltage of approximately 1.34 V at 25 mA cm −2, with a coulombic ...

ESS said its iron-flow batteries have a chemistry that lasts 20 years or more with no capacity fade or degradation. ... foregoing the use of rare minerals like vanadium and lithium, ...

“It is the first deployment globally of an Iron-Vanadium (Fe/V) flow battery as a backup solar power source for gas well operations”, the state-owned oil giant said in an online statement.