Na2/3Ni1/3Ti2/3O2: "bi-functional" electrode materials for Na-Ion batteries

Rengarajan Shanmugam, Wei Laiz

    Research output: Research - peer-reviewArticle

    • 17 Citations

    Abstract

    In this paper, we demonstrate the electrochemical properties of a P2-type layered oxide, Nax(Ni2+)1/3(Ti 4+)2/3O2 (x = 2/3), as "bi- functional" electrode material for room temperature, non-aqueous Na-ion batteries. Making use of the high-voltage redox couple Ni2+/Ni 3+ or the low-voltage redox couple Ti4+/Ti3+, we substantiate Na2/3Ni1/3Ti2/3O2 can function either as a cathode with an average voltage of 3.7 V and 75 mAh/g at C/20 or a anode with an average voltage of 0.7 V and 75 mAh/g at C/20. The cathodic Na2/3Ni1/3Ti2/3O2 displays reversible sodium insertion/extraction but has a lower rate capability compared with anodic Na2/3Ni1/3Ti2/3O2.

    LanguageEnglish (US)
    JournalECS Electrochemistry Letters
    Volume3
    Issue number4
    DOIs
    StatePublished - 2014

    Profile

    Ions
    Electrodes
    Electric potential
    Oxidation-Reduction
    Electrochemical properties
    Oxides
    Anodes
    Cathodes
    Sodium
    Display devices
    Temperature

    ASJC Scopus subject areas

    • Electrochemistry
    • Materials Chemistry
    • Fuel Technology

    Cite this

    Na2/3Ni1/3Ti2/3O2 : "bi-functional" electrode materials for Na-Ion batteries. / Shanmugam, Rengarajan; Laiz, Wei.

    In: ECS Electrochemistry Letters, Vol. 3, No. 4, 2014.

    Research output: Research - peer-reviewArticle

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    abstract = "In this paper, we demonstrate the electrochemical properties of a P2-type layered oxide, Nax(Ni2+)1/3(Ti 4+)2/3O2 (x = 2/3), as {"}bi- functional{"} electrode material for room temperature, non-aqueous Na-ion batteries. Making use of the high-voltage redox couple Ni2+/Ni 3+ or the low-voltage redox couple Ti4+/Ti3+, we substantiate Na2/3Ni1/3Ti2/3O2 can function either as a cathode with an average voltage of 3.7 V and 75 mAh/g at C/20 or a anode with an average voltage of 0.7 V and 75 mAh/g at C/20. The cathodic Na2/3Ni1/3Ti2/3O2 displays reversible sodium insertion/extraction but has a lower rate capability compared with anodic Na2/3Ni1/3Ti2/3O2.",
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    N2 - In this paper, we demonstrate the electrochemical properties of a P2-type layered oxide, Nax(Ni2+)1/3(Ti 4+)2/3O2 (x = 2/3), as "bi- functional" electrode material for room temperature, non-aqueous Na-ion batteries. Making use of the high-voltage redox couple Ni2+/Ni 3+ or the low-voltage redox couple Ti4+/Ti3+, we substantiate Na2/3Ni1/3Ti2/3O2 can function either as a cathode with an average voltage of 3.7 V and 75 mAh/g at C/20 or a anode with an average voltage of 0.7 V and 75 mAh/g at C/20. The cathodic Na2/3Ni1/3Ti2/3O2 displays reversible sodium insertion/extraction but has a lower rate capability compared with anodic Na2/3Ni1/3Ti2/3O2.

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