reaction of Li+ O2 to give lithium peroxide (Li2O2), is challenged by several factors, not the
least being the high charging voltage that results when carbon is typically employed as the
cathode host. We report here on the remarkably low 3.2 V potential for Li2O2 oxidation on a
passivated nanostructured metallic carbide (Mo2C), carbon-free cathode host. Online mass
spectrometry coupled with X-ray photoelectron spectroscopy unequivocally demonstrates …