DABCOnium: An Efficient and High‐voltage Stable Singlet Oxygen Quencher for Metal‐O2 Cells

Yann Kevin Petit, Christian Leypold, Nika Mahne, Eleonore Siham Mourad, Lukas Schafzahl, Christian Slugovc, Sergey Borisov, Stefan Freunberger

Publikation: Beitrag in einer FachzeitschriftArtikelForschungBegutachtung

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.

Spracheenglisch
Seiten6535-6539
Seitenumfang5
FachzeitschriftAngewandte Chemie / International Edition
Jahrgang58
Ausgabennummer20
DOIs
StatusVeröffentlicht - 13 Mai 2019

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Singlet Oxygen
Metals
Oxygen
Electric potential
Alkali Metals
Ionic Liquids
Intercalation compounds
Peroxides
Alkali metals
Lithium
Ionic liquids
Superoxides
Oxides
Electrolytes
Amines
Transition metals

Schlagwörter

    ASJC Scopus subject areas

    • !!Chemistry(all)
    • !!Catalysis

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    DABCOnium: An Efficient and High‐voltage Stable Singlet Oxygen Quencher for Metal‐O2 Cells. / Petit, Yann Kevin; Leypold, Christian; Mahne, Nika; Mourad, Eleonore Siham; Schafzahl, Lukas; Slugovc, Christian; Borisov, Sergey; Freunberger, Stefan.

    in: Angewandte Chemie / International Edition , Jahrgang 58, Nr. 20, 13.05.2019, S. 6535-6539.

    Publikation: Beitrag in einer FachzeitschriftArtikelForschungBegutachtung

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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.",
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    AU - Leypold, Christian

    AU - Mahne, Nika

    AU - Mourad, Eleonore Siham

    AU - Schafzahl, Lukas

    AU - Slugovc, Christian

    AU - Borisov, Sergey

    AU - Freunberger, Stefan

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    AB - 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.

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    KW - electrochemistry

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    KW - quenchers

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