Two-electron mediation enables fast alkali peroxide cycling and suppresses side reactions in metal-O2 cells
This paper demonstrates that employing two-electron mediators in aprotic alkali metal–O2 batteries enables direct control over the second electron transfer to form peroxides, thereby suppressing the degradation-causing disproportionation of superoxide intermediates and transforming the reaction mechanism from a difficult-to-control chemical-electrochemical process into a fully mediated electrochemical one.