Synthesis and Characterization of Carbon-Coated LiFePO4 with Various Carbon Sources as Cathode Material for Lithium Ion Batteries through a Solid-State Process

Joko Triwibowo; Irvan Alamsyah; Jan Setiawan

doi:10.4028/www.scientific.net/MSF.827.186

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HomeMaterials Science ForumMaterials Science Forum Vol. 827Synthesis and Characterization of Carbon-Coated...

Synthesis and Characterization of Carbon-Coated LiFePO₄ with Various Carbon Sources as Cathode Material for Lithium Ion Batteries through a Solid-State Process

Abstract:

Synthesis of carbon-coated LiFePO₄ as cathode material is performed through a solid-state process. Materials in the form of a powder comprising LiOH.H₂O and Fe₂O₃ and H₃PO₄ in liquid form are mixed evenly to obtain a homogeneous powder. Through the drying process in an oven with a temperature of 80°C for 24 hours a dry powder is obtained. Powder is subsequently ground and calcined in the horizontal tube furnace at a temperature of 320°C for 10 hours under the flowing nitrogen gas. The obtained powder is further ground and mixed with carbon sources as much as 4wt% of the total powder. Citric acid, tartaric acid and fructose are used as the carbon source. These homogeneously mixed powders are subsequently sintered at a temperature of 800°C for 8 hours under the flowing nitrogen gas. Phase obtained from the solid-state process was analyzed by XRD. Phase composition is analyzed by Rietveld refinement that is included in the GSAS-program. The conductivity of obtained powder as cathode materials is tested by EIS (Electrochemical Impedance Spectroscopy). SEM and BET analysis tests are conducted to determine the morphology of powder which can influence the conductivity of the material.

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Periodical:

Materials Science Forum (Volume 827)

Pages:

186-191

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.827.186

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Online since:

August 2015

Authors:

Joko Triwibowo*, Irvan Alamsyah, Jan Setiawan

Keywords:

Carbon Sources, Cathode Material, LiFePO₄/C, Lithium-Ion Battery, Solid-State Process

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