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Diffusion of Li+ ions in LiNi1/3Mn1/3Co1/3O2

By X. Zhang, A. Mauger, W. J. Jiang, H. Groult and C. M. Julien

Abstract

International audienceElectrochemical properties of LiNi1/3Mn1/3Co1/3O2 powders have been investigated for a sample free on any impurity and cation mixing reduced to 1.3%. The discharge capacity decreases from 174 mAh/g (0.01C) to 133 mAh/g when cycled at a high current density of 3Crate. The sample reaches high capacity of 146 mAh/g after 90 cycles when using 1C-rate for discharging, with high capacity retention of 97%. The diffusion coefficient of the Li+ ions has been determined as a function of the delithiation rate by GIT and EIS analysis. The diffusion coefficient is in the range 1011-1012 cm2/s, and goes through a maximum at intermediate delithiation rate

Topics: [ PHYS.QPHY ] Physics [physics]/Quantum Physics [quant-ph]
Publisher: HAL CCSD
Year: 2011
OAI identifier: oai:HAL:hal-00616774v1
Provided by: Hal-Diderot
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