Please use this identifier to cite or link to this item: https://apo.ansto.gov.au/dspace/handle/10238/11521
Title: In operando neutron diffraction study of the temperature and current rate-dependent phase evolution of LiFePO4 in a commercial battery
Authors: Sharma, N
Yu, DH
Zhu, Y
Wu, Y
Peterson, VK
Keywords: Electrodes
Reaction kinetics
Neutron diffraction
Electric batteries
Phase transformations
Electrochemistry
Issue Date: 28-Feb-2017
Publisher: Elsevier
Citation: Sharma, N., Yu, D. H., Zhu, Y., Wu, Y., & Peterson, V. K. (2017). In operando neutron diffraction study of the temperature and current rate-dependent phase evolution of LiFePO4 in a commercial battery. Journal of Power Sources, 342, 562-569. doi:10.1016/j.jpowsour.2016.12.048
Abstract: In operando NPD data of electrodes in lithium-ion batteries reveal unusual LiFePO4 phase evolution after the application of a thermal step and at high current. At low current under ambient conditions the LiFePO4 to FePO4 two-phase reaction occurs during the charge process, however, following a thermal step and at higher current this reaction appears at the end of charge and continues into the next electrochemical step. The same behavior is observed for the FePO4 to LiFePO4 transition, occurring at the end of discharge and continuing into the following electrochemical step. This suggests that the bulk (or the majority of the) electrode transformation is dependent on the battery's history, current, or temperature. Such information concerning the non-equilibrium evolution of an electrode allows a direct link between the electrode's functional mechanism that underpins lithium-ion battery behavior and the real-life operating conditions of the battery, such as variable temperature and current, to be made. Crown Copyright©2016 Published by Elsevier B.V
URI: https://doi.org/10.1016/j.jpowsour.2016.12.048
https://apo.ansto.gov.au/dspace/handle/10238/11521
ISSN: 0378-7753
Appears in Collections:Journal Articles

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