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

M. K. Devaraju; Takaaki Tomai; Itaru Honma

doi:10.1016/j.electacta.2013.07.056

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

M. K. Devaraju, Takaaki Tomai, Itaru Honma

Tohoku University

Research output: Contribution to journal › Article › peer-review

42 Citations (Scopus)

Abstract

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 language	English
Pages (from-to)	75-81
Number of pages	7
Journal	Electrochimica Acta
Volume	109
DOIs	https://doi.org/10.1016/j.electacta.2013.07.056
Publication status	Published - 2013

Keywords

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

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10.1016/j.electacta.2013.07.056

Cite this

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

abstract = "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.",

keywords = "Carbon coating, Discharge capacity, Li-ion battery, Lithium iron silicate, Rate capability",

author = "Devaraju, {M. K.} and Takaaki Tomai and Itaru Honma",

note = "Funding Information: This research work was financially supported by NEDO . One of the authors (M.K. Devaraju) would like to acknowledge the financial support by Japan Society for Promotion of Science , Japan for their fellowship to carry out the research work. ",

year = "2013",

doi = "10.1016/j.electacta.2013.07.056",

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pages = "75--81",

journal = "Electrochimica Acta",

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AU - Devaraju, M. K.

AU - Tomai, Takaaki

AU - Honma, Itaru

N1 - Funding Information: This research work was financially supported by NEDO . One of the authors (M.K. Devaraju) would like to acknowledge the financial support by Japan Society for Promotion of Science , Japan for their fellowship to carry out the research work.

PY - 2013

Y1 - 2013

N2 - 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.

AB - 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.

KW - Carbon coating

KW - Discharge capacity

KW - Li-ion battery

KW - Lithium iron silicate

KW - Rate capability

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