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Synthesis, structure characterization and magnetic properties of nanosize LiCo1 − y Ni y O2 prepared by sol–gel citric acid route

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Abstract

Single phase LiCo1 − y Ni y O2 (y = 0.4 and 0.5) with fine particles and high homogeneity was synthesized by “chimie douce” assisted by citric acid as the polymeric agent and investigated as positive electrodes in rechargeable lithium batteries. The long-range and short-range structural properties are investigated with experiments including X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and superconducting quantum interference device magnetometry. The physicochemical properties of the powders (crystallinity, lattice constants, grain size) have been investigated in this composition. The powders adopted the α-NaFeO2 structure as it appeared from XRD and FTIR results. Magnetic measurements shows signal at low temperature attributed to the magnetic domains in the nanostructure sample from which we estimated that the cation mixing are 3.35 and 4.74% for y = 0.4 and 0.5 in LiCo1 − y Ni y O2, respectively. LiCo0.5Ni0.5O2 cathode yields capacity (135 mAh g−1) compared to LiCo0.6Ni0.4O2 cathode (147 mAh g−1) when discharged to a cutoff voltage of 2.9 V vs. Li/Li+. Lower capacity loss and higher discharge efficiency percentage are observed for the cell of LiCo0.6Ni0.4O2 cathode.

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Authors and Affiliations

  1. Inorganic Chemistry Department, National Research Centre, Behoos Street, Dokki, Cairo, Egypt

    A. E. Abdel Ghany, A. M. A. Hashem, H. A. M. Abuzeid & A. E. Eid

  2. Chemistry Department, Women’s College for Arts, Science and Education, Ain Shames University, Cairo, Egypt

    H. A. Bayoumi

  3. Institut des Nano-Sciences de Paris, UMR 7588, Université Pierre et Marie Curie, 140 rue de Lourmel, 75015, Paris, France

    C. M. Julien

Authors
  1. A. E. Abdel Ghany
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  2. A. M. A. Hashem
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  3. H. A. M. Abuzeid
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  4. A. E. Eid
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  5. H. A. Bayoumi
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  6. C. M. Julien
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Correspondence to A. M. A. Hashem.

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Abdel Ghany, A.E., Hashem, A.M.A., Abuzeid, H.A.M. et al. Synthesis, structure characterization and magnetic properties of nanosize LiCo1 − y Ni y O2 prepared by sol–gel citric acid route. Ionics 15, 49–59 (2009). https://doi.org/10.1007/s11581-008-0273-5

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  • DOI: https://doi.org/10.1007/s11581-008-0273-5

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