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Materials 2018, 11(1), 56; https://doi.org/10.3390/ma11010056

Synthesis, Characterization, and Electrochemical Behavior of LiMnxFe(1−x)PO4 Composites Obtained from Phenylphosphonate-Based Organic-Inorganic Hybrids

1
Department of Basic and Applied Sciences for Engineering (SBAI), Sapienza University of Rome, Via del Castro Laurenziano 7, 00161 Rome, Italy
2
Istituto di Struttura della Materia ISM—CNR, Via Salaria, km. 29.300, C.P. 10, 00015 Rome, Italy
3
Department Chemical Engineering Materials Environment DICMA, University Sapienza Rome, Via Eudossiana 18, 00184 Rome, Italy
*
Authors to whom correspondence should be addressed.
Received: 14 November 2017 / Revised: 20 December 2017 / Accepted: 27 December 2017 / Published: 30 December 2017
(This article belongs to the Special Issue Sol-Gel Chemistry Applied to Materials Science)
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Abstract

The synthesis of organic-inorganic hybrid compounds based on phenylphosphonate and their use as precursors to form LiMnxFe(1−x)PO4 composites containing carbonaceous substances with sub-micrometric morphology are presented. The experimental procedure includes the preliminary synthesis of Fe2+ and/or Mn2+ phenylphosphonates with the general formula Fe(1−x)Mnx[(C6H5PO3)(H2O)] (with 0 < x < 1), which are then mixed at different molar ratios with lithium carbonate. In this way the carbon, obtained from in situ partial oxidation of the precursor organic part, coats the LiMnxFe(1−x)PO4 particles. After a structural and morphological characterization, the electrochemical behavior of lithium iron manganese phosphates has been compared to the one of pristine LiFePO4 and LiMnPO4, in order to evaluate the doping influence on the material. View Full-Text
Keywords: lithium-ion battery; LiMnxFe(1−x)PO4; carbon coating; pseudo-diffusion coefficient; potential step voltammetry; electrochemical impedance spectroscopy lithium-ion battery; LiMnxFe(1−x)PO4; carbon coating; pseudo-diffusion coefficient; potential step voltammetry; electrochemical impedance spectroscopy
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Dell’Era, A.; Pasquali, M.; Bauer, E.M.; Vecchio Ciprioti, S.; Scaramuzzo, F.A.; Lupi, C. Synthesis, Characterization, and Electrochemical Behavior of LiMnxFe(1−x)PO4 Composites Obtained from Phenylphosphonate-Based Organic-Inorganic Hybrids. Materials 2018, 11, 56.

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