Preparation of LiFePO4/C composites by co-precipitation in molten stearic acid
Kuzmanović, Maja D.
Škapin, Srečo Davor
Cekić, Božidar Đ.
Ivanovski, Valentin N.
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The olivine type LiFePO4 is synthesized via a simple and inexpensive route by aqueous co-precipitation of an Fe(II) precursor material in molten stearic acid and subsequent heat treatment at different temperatures. Stearic acid serves as both chelating agent and carbonaceous material. The obtained composites with carbon are characterized by X-ray powder diffraction, field emission scanning electron microscopy, and Mossbauer spectroscopy. Electrochemical characteristics of the composites are evaluated by using galvanostatic charge/discharge tests. The powder obtained at 700 degrees C delivers discharge capacity of 160 mAh g(-1), quite near the theoretical value. (C) 2011 Elsevier B.V. All rights reserved.
Keywords:lithium iron phosphate (LiFePO4) / Rietveld analysis / Mossbauer spectroscopy / cathode
Source:Journal of Power Sources, 2011, 196, 10, 4613-4618
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