Study of transport properties and interfacial kinetics of Na2/3[Ni1/3MnxTi2/3-x]O2 (x = 0,1/3) as electrodes for Na-Ion batteries

Rengarajan Shanmugam, Wei Laiz

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    Abstract

    We investigated the transport properties and interfacial kinetics of P2-Na2/3[Ni1/3Ti2/3]O2 (NT) and P2-Na2/3[Ni1/3Mn1/3Ti1/3]O2 (NMT) layered oxide materials, using three techniques: DC conductivity measurement, potentiostatic intermittent titration technique, and impedance spectroscopy. The measured electronic conductivity (NT: 3.96 × 10-8 S/cm, NMT: 1.21 × 10-7 S/cm at 110?C) was orders of magnitude lower than the ionic conductivity (NT: 4.89 × 10-3 S/cm, NMT: 8.28 × 10-3 S/cm at 110?C) in both materials.Manganese addition improved the charge carrier transport properties by a factor of 2-3. The potential-dependent diffusion coefficients of both materials were in the order of 10-14-10-12 cm2/s. The charge transfer resistance was also found to have a strong potential dependency and the interfacial kinetics of NMT were considerably faster than NT. Due to its faster ionic/electronic transport in the pristine/intercalated states and faster interfacial kinetics, NMT was found to exhibit better rate performance than NT. Further performance improvements need to focus on boasting the intrinsic electronic conductivity of these materials.

    Original languageEnglish (US)
    Pages (from-to)A8-A14
    JournalJournal of the Electrochemical Society
    Volume162
    Issue number1
    DOIs
    StatePublished - 2015

    Profile

    kinetics
    Traffic Accidents
    Kinetics
    transport properties
    conductivity
    electronics
    alpha-Fetoproteins
    Transport properties
    titration
    ion currents
    electric batteries
    manganese
    charge carriers
    diffusion coefficient
    direct current
    charge transfer
    impedance
    electrodes
    oxides
    spectroscopy

    ASJC Scopus subject areas

    • Electrochemistry
    • Electronic, Optical and Magnetic Materials
    • Materials Chemistry
    • Surfaces, Coatings and Films
    • Renewable Energy, Sustainability and the Environment
    • Condensed Matter Physics

    Cite this

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    title = "Study of transport properties and interfacial kinetics of Na2/3[Ni1/3MnxTi2/3-x]O2 (x = 0,1/3) as electrodes for Na-Ion batteries",
    abstract = "We investigated the transport properties and interfacial kinetics of P2-Na2/3[Ni1/3Ti2/3]O2 (NT) and P2-Na2/3[Ni1/3Mn1/3Ti1/3]O2 (NMT) layered oxide materials, using three techniques: DC conductivity measurement, potentiostatic intermittent titration technique, and impedance spectroscopy. The measured electronic conductivity (NT: 3.96 × 10-8 S/cm, NMT: 1.21 × 10-7 S/cm at 110?C) was orders of magnitude lower than the ionic conductivity (NT: 4.89 × 10-3 S/cm, NMT: 8.28 × 10-3 S/cm at 110?C) in both materials.Manganese addition improved the charge carrier transport properties by a factor of 2-3. The potential-dependent diffusion coefficients of both materials were in the order of 10-14-10-12 cm2/s. The charge transfer resistance was also found to have a strong potential dependency and the interfacial kinetics of NMT were considerably faster than NT. Due to its faster ionic/electronic transport in the pristine/intercalated states and faster interfacial kinetics, NMT was found to exhibit better rate performance than NT. Further performance improvements need to focus on boasting the intrinsic electronic conductivity of these materials.",
    author = "Rengarajan Shanmugam and Wei Laiz",
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    volume = "162",
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    AU - Laiz,Wei

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    N2 - We investigated the transport properties and interfacial kinetics of P2-Na2/3[Ni1/3Ti2/3]O2 (NT) and P2-Na2/3[Ni1/3Mn1/3Ti1/3]O2 (NMT) layered oxide materials, using three techniques: DC conductivity measurement, potentiostatic intermittent titration technique, and impedance spectroscopy. The measured electronic conductivity (NT: 3.96 × 10-8 S/cm, NMT: 1.21 × 10-7 S/cm at 110?C) was orders of magnitude lower than the ionic conductivity (NT: 4.89 × 10-3 S/cm, NMT: 8.28 × 10-3 S/cm at 110?C) in both materials.Manganese addition improved the charge carrier transport properties by a factor of 2-3. The potential-dependent diffusion coefficients of both materials were in the order of 10-14-10-12 cm2/s. The charge transfer resistance was also found to have a strong potential dependency and the interfacial kinetics of NMT were considerably faster than NT. Due to its faster ionic/electronic transport in the pristine/intercalated states and faster interfacial kinetics, NMT was found to exhibit better rate performance than NT. Further performance improvements need to focus on boasting the intrinsic electronic conductivity of these materials.

    AB - We investigated the transport properties and interfacial kinetics of P2-Na2/3[Ni1/3Ti2/3]O2 (NT) and P2-Na2/3[Ni1/3Mn1/3Ti1/3]O2 (NMT) layered oxide materials, using three techniques: DC conductivity measurement, potentiostatic intermittent titration technique, and impedance spectroscopy. The measured electronic conductivity (NT: 3.96 × 10-8 S/cm, NMT: 1.21 × 10-7 S/cm at 110?C) was orders of magnitude lower than the ionic conductivity (NT: 4.89 × 10-3 S/cm, NMT: 8.28 × 10-3 S/cm at 110?C) in both materials.Manganese addition improved the charge carrier transport properties by a factor of 2-3. The potential-dependent diffusion coefficients of both materials were in the order of 10-14-10-12 cm2/s. The charge transfer resistance was also found to have a strong potential dependency and the interfacial kinetics of NMT were considerably faster than NT. Due to its faster ionic/electronic transport in the pristine/intercalated states and faster interfacial kinetics, NMT was found to exhibit better rate performance than NT. Further performance improvements need to focus on boasting the intrinsic electronic conductivity of these materials.

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