In operando detection of lithium diffusion behaviors at low temperature in 18650 Li-ion battery anode
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Date
2018-12-15
Journal Title
Journal ISSN
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Publisher
Elsevier
Abstract
Lithium diffusion process in an 18650 cell was investigated in-operando using neutron diffraction. The graphite anode delithiation rate and the amount of discharge capacity during the discharging process were correlated with the temperature and current rate. At room temperature, the lithium diffusion rate in LiC6 phase at the high rate capability (C/5) is same as at low rate capability (C/20), which means that lithium diffusion in LiC6 crystal phase is independent of the current rate in this range during the discharge process. Lowering temperature to −20 °C decreases both the lithium diffusion and capacity, although the latter can be partially recovered by using lower C-rate. © 2018 Elsevier B.V.
Description
Keywords
Radioisotope batteries, Temperature range 0065-0273 K, Neutron diffraction, Graphite, Diffusion, Crystal-phase transformations
Citation
Wu, C.- M., Chang, C.- C., Avdeev, M., Pan, P.- I., & Li, W.- H. (2018). In operando detection of lithium diffusion behaviors at low temperature in 18650 Li-ion battery anode. Paper presented to the 11th International Conference on Neutron Scattering (ICNS 2017), 9-13 July, Daejeon, Korea. Physica B: Condensed Matter, 551, 305-308, doi:10.1016/j.physb.2018.02.032