Structural, electrical and dielectric studies of nanocrystalline LiMnPO4 particles

Olivine-structured LiMnPO4 nanoparticles were prepared by microwave-assisted solvothermal method. The as obtained LiMnPO4 sample was characterized by X-ray diffraction (XRD), field-emission scanning electron microscopy (FE-SEM) and impedance spectroscopy techniques. The XRD pattern confirms the formation of LiMnPO4 phase with an orthorhombic structure. The electrical conductivity of the sample at room temperature is found to be 1.2654 × 10−7 S cm−1. Dielectric spectra show an increase in dielectric constant with increase of temperature. The dielectric loss spectra reveal the predomination of DC conduction in the sample. The modulus studies indicate the non-Debye nature of the sample which corresponds to the distribution of elements in the sample. Galvanostatic battery testing showed that LiMnPO4 nanoparticles displayed good cycleability in 30 cycles.