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<p>The solid-state blending process was used to develop the PPy/LiMnPO<sub>4</sub> nanocomposite using various weight ratios of LiMnPO<sub>4</sub>. The prepared samples were analyzed using field emission scanning electron microscopy (FE-SEM), energy-dispersive X-ray analysis (EDAX), electrical conductivity, X-ray diffraction, cyclic voltammetry, impedance analysis, and charge–discharge analysis. FE-SEM studies revealed spherical and nanorod morphologies. The EDAX spectrum did not indicate the presence of Li metal. XPS analysis confirmed the presence of Li, Mn, O, P, and C. FT-IR analysis confirmed the presence of PO<sub>4</sub>3<sup>−</sup> in the composite structure. The conductivity measurements showed that the conductivity of the composites decreased with increasing concentration of LiMnPO<sub>4</sub>. X-ray diffraction confirmed the orthorhombic crystal structure with prominent peaks corresponding to the (121), (131), (112), (222), and (260) planes. The average particle size was found to be 73 nm. The electrochemical performance of the LiMnPO<sub>4</sub>–PPy composite towards lithium storage and supercapattery devices was analyzed. The lithium-ion half-cell (LiMnPO<sub>4</sub>–PPy–PVDF|1 M LiPF<sub>6</sub>|Li) in the form of a CR-2032 coin cell exhibited a high discharge capacity of about 9.8 mAh g<sup>−</sup>1 at a rate of 0.1 C with excellent cyclic stability. Impedance analysis indicated that PPy/LiMnPO<sub>4</sub> is a suitable cathode material for lithium storage devices.</p>

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Fabrication of PPy-PVDF/LiMnPO4 nanocomposite cathode material for Li-ion batteries: Performances of CR-2032 coin cells

  • 期刊论文

  • 发表日期：

    2026年4月22日

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  • P Jayamurugan,
  • Shamimahusssain,
  • N V S S Seshagiri Rao,
  • P Horsley Solomon,
  • A Seethai,
  • D Sudhadevi,
  • K Navaneetha Pandiyaraj,
  • Parasuraman Ponnusamy,
  • L Guganathan

摘要

The solid-state blending process was used to develop the PPy/LiMnPO4 nanocomposite using various weight ratios of LiMnPO4. The prepared samples were analyzed using field emission scanning electron microscopy (FE-SEM), energy-dispersive X-ray analysis (EDAX), electrical conductivity, X-ray diffraction, cyclic voltammetry, impedance analysis, and charge–discharge analysis. FE-SEM studies revealed spherical and nanorod morphologies. The EDAX spectrum did not indicate the presence of Li metal. XPS analysis confirmed the presence of Li, Mn, O, P, and C. FT-IR analysis confirmed the presence of PO43− in the composite structure. The conductivity measurements showed that the conductivity of the composites decreased with increasing concentration of LiMnPO4. X-ray diffraction confirmed the orthorhombic crystal structure with prominent peaks corresponding to the (121), (131), (112), (222), and (260) planes. The average particle size was found to be 73 nm. The electrochemical performance of the LiMnPO4–PPy composite towards lithium storage and supercapattery devices was analyzed. The lithium-ion half-cell (LiMnPO4–PPy–PVDF|1 M LiPF6|Li) in the form of a CR-2032 coin cell exhibited a high discharge capacity of about 9.8 mAh g−1 at a rate of 0.1 C with excellent cyclic stability. Impedance analysis indicated that PPy/LiMnPO4 is a suitable cathode material for lithium storage devices.