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Temperature-Dependent Dynamic Properties of LixMn2O4 in Monte Carlo Simulations |
OUYANG Chu-Ying1,2;SHI Si-Qi1;WANG Zhao-Xiang1;LI Hong1;HUANG Xue-Jie1;CHEN Li-Quan1 |
1Laboratory for Solid State Ionics, Institute of Physics, Chinese Academy of Sciences, PO Box 603, Beijing 100080
2Department of Physics, Jiangxi Normal University, Nanchang 330027 |
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Cite this article: |
OUYANG Chu-Ying, SHI Si-Qi, WANG Zhao-Xiang et al 2005 Chin. Phys. Lett. 22 489-492 |
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Abstract Monte Carlo (MC) simulations are used to simulate the voltage profile and the ionic conductivity s of Li ions in LixMn2O4 and its dependence on the lithium concentration x. The open circuit potential shows clearly the two plateaus in the charge/discharge curve, which agrees well with the experimental results. The two plateaus become more and more steep when the temperature is increased. The simulated ionic conductivity shows an M-shaped curve in the plot of ionic conductivity σ versus x when the simulation temperature is low. Interestingly, the minimum valley, which lies at the middle single-phase area near x = 0.5, disappears gradually when the temperature increases to 453K.
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Keywords:
82.47.Aa
02.70.Uu
66.30.-h
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Published: 01 February 2005
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