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Synthesis and characterization of LiFePO4/3-dimensional carbon nanostructure composites as possible cathode materials for Li-ion batteries

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Abstract

Composites of three-dimensional (3D) carbon nanostructures coated with olivine-structured lithium iron phosphates (LiFePO4) as cathode materials for lithium ion batteries have been prepared through a Pechini-assisted reversed polyol process for the first time. The coating has been successfully performed on nonfunctionalized commercially available 3D carbon used as catalysts. Thermal analysis revealed no phase transitions till crystallization occurred at 579 °C. Morphological investigation of the prepared composites showed a very good quality of the coating on the 3D carbon structures. A great enhancement of the crystallinity of the olivine structure and of the composites was revealed by the structural investigation performed on pure LiFePO4 and composites after annealing at 600 °C for 10 h under nitrogen atmosphere. The cyclic voltammetry curves of the composites show well-defined peaks and smaller value of the polarization overpotential indicating an enhancement of electrode reaction reversibility compared to the LiFePO4 phase.

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Acknowledgments

One of the authors (LD) thanks the Deutsch Forschungsgemeinschaft (DFG) for the financial support during this work. The technical support of Ms. C. Fasel (DTA/TG measurements) and Mr. J.-C. Jaud (XRD analysis) is acknowledged and gratefully appreciated.

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Authors and Affiliations

  1. Surface Investigation Division, Materials Science Department, Darmstadt University of Technology, Petersenstrasse 32, 64287, Darmstadt, Germany

    Lucangelo Dimesso, Christina Spanheimer, Susanne Jacke & Wolfram Jaegermann

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  1. Lucangelo Dimesso
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  2. Christina Spanheimer
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  3. Susanne Jacke
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  4. Wolfram Jaegermann
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Correspondence to Lucangelo Dimesso.

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Dimesso, L., Spanheimer, C., Jacke, S. et al. Synthesis and characterization of LiFePO4/3-dimensional carbon nanostructure composites as possible cathode materials for Li-ion batteries. Ionics 17, 429–435 (2011). https://doi.org/10.1007/s11581-011-0521-y

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  • DOI: https://doi.org/10.1007/s11581-011-0521-y

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