DABCOnium: An Efficient and High‐Voltage Stable Singlet Oxygen Quencher for Metal–O2 Cells,Angewandte Chemie International Edition

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DABCOnium: An Efficient and High‐Voltage Stable Singlet Oxygen Quencher for Metal–O2 Cells
Angewandte Chemie International Edition ( IF 16.1 ) Pub Date : 2019-04-09 , DOI: 10.1002/anie.201901869
Yann K. Petit ₁ , Christian Leypold ₁ , Nika Mahne ₁ , Eléonore Mourad ₁ , Lukas Schafzahl ₁ , Christian Slugovc ₁ , Sergey M. Borisov ₂ , Stefan A. Freunberger ₁

Affiliation

Singlet oxygen (¹O₂) causes a major fraction of the parasitic chemistry during the cycling of non‐aqueous alkali metal‐O₂ 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 ¹O₂ 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–O₂ batteries and greatly reduces ¹O₂ related parasitic chemistry as demonstrated for the Li–O₂ cell.

中文翻译：

DABCOnium：用于金属-O2电池的高效高压稳定单线态氧猝灭剂

单线态氧（¹ O ₂）在非水碱金属O ₂电池循环过程中引起大部分寄生化学，并且也有助于过渡金属氧化物插层化合物的界面反应性。我们引入了DABCOnium，它是1,4-二氮杂双环[2.2.2]辛烷（DABCO）的单烷基化形式，是一种高效的¹ O ₂猝灭剂，具有大约很高的氧化稳定性。4.2 V vs.锂/锂⁺。先前的淬灭剂是氧化稳定性太低的强路易斯碱胺。DABCOnium是一种离子液体，不挥发，在电解质中高度可溶，对超氧化物和过氧化物稳定，并且与锂金属兼容。电化学稳定性涵盖了金属-O ₂电池所需的范围，并大大降低了与Li–O ₂电池相关的¹ O ₂相关寄生化学。

更新日期：2019-04-09

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