期刊
POWDER DIFFRACTION
卷 25, 期 2, 页码 143-148出版社
CAMBRIDGE UNIV PRESS
DOI: 10.1154/1.3393786
关键词
in situ neutron scattering; Li-ion battery; LiFePO4; FePO4; Li-graphite phases
The electrochemical reaction behavior of a commercial Li-ion battery (LiFePO4-based cathode, graphite-based anode) has been measured via in situ neutron diffraction. A multivariate analysis was successfully applied to the neutron diffraction data set facilitating in the determination of Li bearing phases participating in the electrochemical reaction in both the anode and cathode as a function of state-of-charge (SOC). The analysis resulted in quantified phase fraction values for LiFePO4 and FePO4 cathode compounds as well as the identification of staging behavior of Li-6, Li-12, Li-24, and graphite phases in the anode. An additional Li-graphite phase has also been tentatively identified during electrochemical cycling as LiC48 at conditions of similar to 5% to 15% SOC. (C) 2010 International Centre for Diffraction Data. [DOI: 10.1154/1.3393786]
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