Supercritical hydrothermal synthesis of rod like Li2FeSiO 4 particles for cathode application in lithium ion batteries

M. K. Devaraju, Takaaki Tomai, Itaru Honma

    Research output: Contribution to journalArticlepeer-review

    41 Citations (Scopus)


    A cheap and rapid supercritical hydrothermal method has been adopted for the synthesis of Li2FeSiO4 cathode materials for the application in lithium ion battery. The as-synthesized Li2FeSiO 4 particles at 380°C exhibited rod like morphology with 20.80 nm in diameter and 500 nm.1 μm in length character-ized by transmission electron microscopy (TEM). The Li2FeSiO4 material is systematically characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), thermo gravimetric analysis (TG),scanning transmission electron microscopy (STEM) and energy dispersive X-ray (EDX). The electrochem-ical measurements were carried out after coating of Li 2FeSiO4 particles with different weight percentageof conductive carbon. The discharge capacity of as-synthesized rod like Li 2FeSiO4 with 30 wt% conductivecarbon coating exhibited 177 mAh g-1 for the first cycle, which is more than that of as-synthesized and 20 wt% conductive carbon coated rod like Li 2FeSiO4 particles. The obtained discharge capacity is the high-est for this material without high temperature heat treatment, which indicating that rod like morphologywith diameter 20.80 nm could be more active during electrochemical reactions.

    Original languageEnglish
    Pages (from-to)75-81
    Number of pages7
    JournalElectrochimica Acta
    Publication statusPublished - 2013


    • Carbon coating
    • Discharge capacity
    • Li-ion battery
    • Lithium iron silicate
    • Rate capability

    ASJC Scopus subject areas

    • Chemical Engineering(all)
    • Electrochemistry


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