Volume expansion of amorphous silicon electrodes during potentiostatic lithiation of Li-ion batteries
Volume expansion of amorphous silicon electrodes during potentiostatic lithiation of Li-ion batteries
复制标题
锂离子电池恒电位锂化过程中非晶硅电极的体积膨胀
DOI:
10.1016/j.elecom.2020.106738
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发表时间:
2020
影响因子:
5.4
通讯作者:
J. Stahn
中科院分区:
文献类型:
--
作者:
H. Schmidt;B. Jerliu;E. Hüger;J. Stahn
Large volume modifications during electrochemical cycling of electrodes in Li-ion batteries often limit successful applications due to stress formation, electrode fracture and delamination from the current collector. In this study, we carried out investigations on the volume changes taking place during potentiostatic lithiation of the high capacity electrode material amorphous silicon. Thin film electrodes were investigated at potentials of 0.45, 0.28, 0.19 und 0.06 V vs Li/Li+during lithiation using in-operando neutron reflectometry. We found a strongly non-linear correlation between volume and state-of-charge for each potential applied in strong contrast to the results of galvanostatic lithiation. A possible explanation might be that for high current densities occurring at the beginning of each potentiostatic lithiation step free volumes are created in the electrode material leading to disproportionate volume expansion.
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DOI:
10.1016/j.nima.2016.03.007
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影响因子:
1.4
作者:
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