Lowering Charge Overpotential of Li2S via Inductive Effect of Phenyl Diselenide in Li-S Batteries

We find that phenyl diselenide (PDSe) can lower the charge overpotential of Li2S via inductive effect. The Se-Se bond of PDSe can break when it is in contact with Li2S. The attraction between Se-Li weakens Li-S bonds and facilitates oxidation of Li2S, leading to reduced initial charge overpotential.