Preparation of LiFePO₄/C composites by co-precipitation in molten stearic acid

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• 作者：Dragana Jugović ; ^a ; ^{dragana.jugovic@itn.sanu.ac.rs} ; ^{djugovic@vinca.rs} ; Miodrag Mitrić ; ^b ; Maja Kuzmanović ; ^a ; Nikola Cvjetić ; anin^c ; Sreč ; o Š ; kapin^d ; Bo&#x17e ; idar Cekić ; ^b ; Valentin Ivanovski^b ; Dragan Uskoković ; ^a
• 关键词：Lithium iron phosphate (LiFePO₄) ; Rietveld analysis ; Mö ; ssbauer spectroscopy ; Cathode
• 刊名：Journal of Power Sources
• 出版年：2011
• 出版时间：15 May 2011
• 年：2011
• 卷：196
• 期：10
• 页码：4613-4618
• 全文大小：929 K

文摘

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 Mössbauer spectroscopy. Electrochemical characteristics of the composites are evaluated by using galvanostatic charge/discharge tests. The powder obtained at 700 °C delivers discharge capacity of 160 mAh g⁻¹, quite near the theoretical value.