Singlet Oxygen during Cycling of the Aprotic Sodium-O₂ Battery.

ABSTRACT: Aprotic sodium-O₂ batteries require the reversible formation/dissolution of sodium superoxide (NaO₂ ) on cycling. Poor cycle life has been associated with parasitic chemistry caused by the reactivity of electrolyte and electrode with NaO₂ , a strong nucleophile and base. Its reactivity can, however, not consistently explain the side reactions and irreversibility. Herein we show that singlet oxygen (¹ O₂ ) forms at all stages of cycling and that it is a main driver for parasitic chemistry. It was detected in- and ex-situ via a ¹ O₂ trap that selectively and rapidly forms a stable adduct with ¹ O₂ . The ¹ O₂ formation mechanism involves proton-mediated superoxide dispropor

SUBMITTER: Schafzahl L 

PROVIDER: S-EPMC5725720 | biostudies-literature | 2017 Dec

REPOSITORIES: biostudies-literature