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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/12773
Title: Effect of solvents on electrochemical performance of polypyrrole coated LiFePO4/C cathode materials for Li-ion battery
Authors: Sehrawat R.
Sil, Anjan
Published in: Journal of Materials Science: Materials in Electronics
Abstract: The effect of the nature of solvent on polypyrrole (PPy) synthesis by in situ coating on the prior synthesized carbon coated LiFePO4 for electrochemical properties of composite materials designated as LiFePO4/C-PPy has been investigated. An in situ chemical oxidation method is used for the polymerization of pyrrole by using three different solvents e.g. water, ethanol and acetonitrile (ACN). The structure and morphology of PPy grown as coating is characterized by Raman spectroscopy and scanning electron microscopy respectively. X-ray diffraction patterns of the composites confirm the presence of Li0.05FePO4 compound as a minor phase along with major LiFePO4 phase. The ACN assisted synthesized PPy coating shows best electrochemical performance as cathode material among selected solvents used for the synthesis. Electrochemical impedance spectroscopy indicates lowest electrode impedance and highest Li-ion diffusion for the composite LiFePO4/C-PPy synthesized in ACN solvent as compared to the water and ethanol derived samples. The higher rate capability (82 mAh g−1) of the composite LiFePO4/C-PPy synthesized in ACN solvent as compared to LiFePO4/C (42 mAh g−1), is attributed to the morphology and structure of the polymer coating. © 2015, Springer Science+Business Media New York.
Citation: Journal of Materials Science: Materials in Electronics (2015), 26(7): 5175-5185
URI: https://doi.org/10.1007/s10854-015-3048-6
http://repository.iitr.ac.in/handle/123456789/12773
Issue Date: 2015
Publisher: Springer New York LLC
ISSN: 9574522
Author Scopus IDs: 49461841800
7003754102
Author Affiliations: Sehrawat, R., Department of Metallurgical and Materials Engineering, Indian Institute of Technology Roorkee, Rookee, 247667, India
Sil, A., Department of Metallurgical and Materials Engineering, Indian Institute of Technology Roorkee, Rookee, 247667, India
Corresponding Author: Sehrawat, R.; Department of Metallurgical and Materials Engineering, Indian Institute of Technology RoorkeeIndia
Appears in Collections:Journal Publications [MT]

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