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Synthesis and redox behavior of a new polyanion compound, Li2Co2(MoO4)3, as 4 V class positive electrode material for lithium batteries

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Abstract

A new material, Li2Co2(MoO4)3, belonging to NASICON type polyanion family was synthesized by means of a low temperature soft-combustion method using glycine as a soft combustion fuel. The annealed product, Li2Co2(MoO4)3, was found to exhibit a single phase structure as confirmed by XRD and crystallized in an orthorhombic structure (space group Pnma) with lattice parametersa=5.086(1) Å,b=10.484(2) Å and c=17.606(2) Å. The electronic state of each element present in the new material was confirmed by X-ray photoelectron spectroscopic (XPS) analysis. The stoichiometry of the synthesized product was determined by the metal analysis using inductively coupled plasma (ICP-AES) technique. The microstructural analysis by means of SEM revealed cylindrical fiber-like grains. Electrochemistry of the new material was demonstrated by extraction/insertion process of Li+ in lithium batteries. Galvanostatic charge/discharge profiles revealed a reversible discharge capacity of ∼ 55 mAh/g over the potential window of 4.9 - 1.5 V.

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Author notes

  1. K. M. Begam

    Present address: Universiti Kuala Lumpur-Malaysia France Institute, Bandar Baru Bangi, Malaysia

Authors and Affiliations

  1. Advanced Power Sources Laboratory, Faculty of Engineering, Multimedia University, 63100, Cyberjaya, Malaysia

    K. M. Begam, M. S. Michael & S. R. S. Prabaharan

  2. Solid State Ionics Laboratory, Department of Physics, Madras Institute of Technology, Anna University, Chennai, India

    S. Selladurai

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  1. K. M. Begam
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  2. S. Selladurai
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  3. M. S. Michael
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  4. S. R. S. Prabaharan
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Begam, K.M., Selladurai, S., Michael, M.S. et al. Synthesis and redox behavior of a new polyanion compound, Li2Co2(MoO4)3, as 4 V class positive electrode material for lithium batteries. Ionics 10, 77–83 (2004). https://doi.org/10.1007/BF02410310

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  • DOI: https://doi.org/10.1007/BF02410310

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