Abstract
LiNiPO4, LiNi0.8Mn0.2PO4, and LiNi0.8Mn0.1Fe0.1PO4 cathodes were prepared via the solid-state reaction technique. The XRD analysis confirmed that all three samples were well crystallized and belonged to the Pnmb space group with an olivine-type structure. FTIR analysis identified the four fundamental stretching and bending vibration modes of ions (PO43− groups) in the tetrahedral sites of all samples. The electrical conductivity was found in the range of 1.51–2.16 × 10–8 S/cm. The dielectric spectra revealed the existence of interfacial polarization Maxwell–Wagner-type dielectric dispersion in all samples. The frequency dependence study of electric modulus revealed the contribution of both long-range and short-range mobility of charge carriers in all samples. This study confirmed that single Mn2+ ions doping is more effective to enhance the electrical conductivity and electrochemical performance of LiNiPO4 cathode than Mn2+ and Fe2+ ions co-doping.
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The authors would like to acknowledge Arba Minch University for providing financial support to conduct this research.
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Kubaya, K., Taddesse, P. Mn2+- and Fe2+-doped LiNiPO4 cathode materials: structural, electrical, dielectric, and electrochemical properties. Appl. Phys. A 128, 619 (2022). https://doi.org/10.1007/s00339-022-05767-8
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DOI: https://doi.org/10.1007/s00339-022-05767-8