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<p>Bare and lithium-doped NiO nanocrystals were prepared through a simple precipitation method without any capping agents. The effects of Li⁺ doping on structural, morphological, magnetic, and electrochemical properties were carefully studied. XRD analysis revealed cubic, well-crystalline phases for the prepared samples, with small peak shifts and crystallite size differences confirming successful lattice combination of lithium. FE-SEM imaging displayed that Li⁺ insertion significantly alters particle shape and aggregation. VSM characterization confirmed room-temperature ferromagnetism in highly doped NiO samples. Electrochemical measurements revealed reduced specific capacitance in all doped nanomaterials, demonstrating that Li substitution impairs charge storage. Nevertheless, the improved properties of Li-doped NiO nanocrystals suggest potential for spintronic and supercapacitor applications.</p>

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A combined study on the structural, magnetic, and electrochemical behaviors of alkaline Li⁺-doped NiO nanocrystals

  • 期刊论文

  • 发表日期：

    2026年6月16日

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  • K. Sathishkumar,
  • M. Silambarasan,
  • R. Boopathiraja,
  • G. Srinivasan

摘要

Bare and lithium-doped NiO nanocrystals were prepared through a simple precipitation method without any capping agents. The effects of Li⁺ doping on structural, morphological, magnetic, and electrochemical properties were carefully studied. XRD analysis revealed cubic, well-crystalline phases for the prepared samples, with small peak shifts and crystallite size differences confirming successful lattice combination of lithium. FE-SEM imaging displayed that Li⁺ insertion significantly alters particle shape and aggregation. VSM characterization confirmed room-temperature ferromagnetism in highly doped NiO samples. Electrochemical measurements revealed reduced specific capacitance in all doped nanomaterials, demonstrating that Li substitution impairs charge storage. Nevertheless, the improved properties of Li-doped NiO nanocrystals suggest potential for spintronic and supercapacitor applications.