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Title of Journal: J Solid State Electrochem

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Abbravation: Journal of Solid State Electrochemistry

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Springer-Verlag

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DOI

10.1007/s12613-012-0654-7

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1433-0768

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Comparison between different ways to determine dif

Authors: A Dell’Era M Pasquali
Publish Date: 2008/07/14
Volume: 13, Issue: 6, Pages: 849-859
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Abstract

The following document covers the determination of the diffusion coefficient of two powder materials LiFePO4 and LiMn2O4 by using potentiostatic intermittent titration technique PITT and impedance spectroscopy methodology and compares relevant results with the following relation D = fracR2 I 0 3alpha Q which is obtained by solving Fick’s spherical coordinate equation where I 0 is the initial step current in the PITT experiment R is the particle radius Q is the charge that intercalated during the step and α is the percentage of the theoretical intercalated charge This procedure allowed the verification of the validity of the spherical model for the powder materials the accuracy of the expression proposed for the diffusion coefficient determination and the correctness of the measures that had been taken

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