<p>One-dimensional mesoporous LiMn₂O₄ nanofibers were synthesized via a combined electrospinning–calcination approach and evaluated as cathode materials for lithium-ion batteries. X-ray diffraction confirmed the formation of phase-pure cubic spinel LiMn₂O₄, while electron microscopy revealed continuous fibrous architectures composed of interconnected nanocrystalline domains with well-developed mesoporosity. The hierarchical structure enhances electronic conductivity and improves electrolyte penetration. The room-temperature electrical conductivity was measured to be 2.5 × 10⁻⁴ S·cm⁻¹, approximately one order of magnitude higher than that of conventional particulate LiMn₂O₄. Electrochemical testing delivered an initial discharge capacity of 134 mAh·g⁻¹ at 0.1 C, with approximately 72% capacity retention after 50 cycles. Electrochemical impedance spectroscopy indicated a gradual increase in charge-transfer resistance during cycling. These results demonstrate that mesoporous one-dimensional structural engineering significantly influences charge-transport characteristics and electrochemical performance in spinel LiMn₂O₄ cathodes.</p>