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

X. Zhang (1) , A. Mauger (1) , W. J. Jiang (2) , H. Groult (3) , C. M. Julien (3)

1 IMPMC - Institut de minéralogie et de physique des milieux condensés
2 Department of Applied Chemistry, College of Chemistry and Molecular Engineering
3 PECSA - Physicochimie des Electrolytes, Colloïdes et Sciences Analytiques

Electrochemical 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.

Domaines: Physique Quantique [quant-ph]

X. Zhang, A. Mauger, W. J. Jiang, H. Groult, C. M. Julien. Diffusion of Li+ ions in LiNi1/3Mn1/3Co1/3O2. ECS Transactions, 2011, 35 (34), pp.89-94. ⟨10.1149/1.3654205⟩. ⟨hal-00616774⟩