Extended Data Fig. 5: Redox potentials in mixed Li+/TBA+ and Na+/TBA+ electrolytes.
From: Marcus kinetics control singlet and triplet oxygen evolving from superoxide
a, Standard potentials of the O2/MO2(s) and O2/M2O2(s) redox couples with M = Li, Na, K as calculated from tabulated formation energies. The common scale is based on their \({E}_{{\rm{M}}/{{\rm{M}}}^{+}}^{\circ }\). b, Cyclic voltammograms (scan rate 100 mVs–1) in O2-saturated tetraglyme containing 100 mM of either TBAClO4, LiClO4, or NaClO4. c, Detailed thermodynamics of the 3O2/superoxide couple as a function of the fractions of Li+ and TBA+ salt. d, Thermodynamics of relevant redox couples for Na+-induced \({{\rm{O}}}_{2}^{-}\) disproportionation as a function of the fractions of Na+ and TBA+ salt. e, Normalised 1270 nm NIR emission signal as a function of Na+ mole fraction, which determines the driving force. Each bar represents a single measurement. Tetraglyme served as the electrolyte solvent.
