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Abstract
Singlet oxygen ( 1 O 2 ) causes a major fraction of the parasitic chemistry during the cycling of non-aqueous alkali metal-O 2 batteries and also contributes to interfacial reactivity of transition-metal oxide intercalation compounds. We introduce DABCOnium, the mono alkylated form of 1,4-diazabicyclo[2.2.2]octane (DABCO), as an efficient 1 O 2 quencher with an unusually high oxidative stability of ca. 4.2 V vs. Li/Li + . Previous quenchers are strongly Lewis basic amines with too low oxidative stability. DABCOnium is an ionic liquid, non-volatile, highly soluble in the electrolyte, stable against superoxide and peroxide, and compatible with lithium metal. The electrochemical stability covers the required range for metal–O 2 batteries and greatly reduces 1 O 2 related parasitic chemistry as demonstrated for the Li–O 2 cell.
Originalsprache | englisch |
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Seiten (von - bis) | 6535-6539 |
Seitenumfang | 5 |
Fachzeitschrift | Angewandte Chemie - International Edition |
Jahrgang | 58 |
Ausgabenummer | 20 |
DOIs | |
Publikationsstatus | Veröffentlicht - 13 Mai 2019 |
ASJC Scopus subject areas
- Chemie (insg.)
- Katalyse
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Oxygen Redox and Singlet Oxygen in Non-aqueous Battery Chemistries
Stefan Freunberger (Redner/in)
5 Aug. 2019Aktivität: Vortrag oder Präsentation › Gastvortrag › Science to science