Quenching singlet oxygen via intersystem crossing for a stable Li-O₂ battery.

ABSTRACT: Aprotic Li-O₂ batteries are a promising energy storage technology, however severe side reactions during cycles lead to their poor rechargeability. Herein, highly reactive singlet oxygen (¹O₂) is revealed to generate in both the discharging and charging processes and is deterimental to battery stability. Electron-rich triphenylamine (TPA) is demonstrated as an effective quencher in the electrolyte to mitigate ¹O₂ and its associated parasitic reactions, which has the tertiary amine and phenyl groups to manifest excellent electrochemical stability and chemical reversibility. It reacts with electrophilic ¹O₂ to form a singlet complex during cycles, and it then quickly transforms to a triplet complex through nonradiati

SUBMITTER: Jiang Z 

PROVIDER: S-EPMC9407589 | biostudies-literature | 2022 Aug

REPOSITORIES: biostudies-literature