“…After charging, a broad peak appeared at ∼270 nm by the electrolyte, which is very likely indicative of the [Cl 3 ] − anion. 51,52 To further confirm the existence of the polychloride monoanions formed with the Mn 3 O 4 structure after charging in the 20 M ZnCl 2 + 5 M NH 4 Cl WiSE, we immersed the fully charged Mn 3 O 4 electrode in an aqueous solution of 0.5 M KI. It was observed that the color of the KI solution quickly turned brownish, thereby indicating the presence of the polychloride monoanions as the charge products with the Mn 3 O 4 host (Fig.…”