Reed Wittman and Yuliya Preger, members of the Safety & Reliability team in the Sandia Energy Storage program recently published the first part of a two-part study on the materials degradation of Li-ion batteries during long-term cycling in the Journal of the Electrochemical Society. The paper titled “Characterization of Cycle-Aged Commercial NMC and NCA Lithium-ion Cells: I. Temperature-Dependent Degradation” focuses on the impact of temperature on the materials of NMC and NCA 18650 cells cycled at different temperatures. For the whole study, the authors produced over 150 data sets, making this the largest characterization study of Li-ion batteries that have gone through systematic cycling to date in the open literature. The article also provides detailed analysis of how these batteries degrade, and how these findings can be used to improve their performance and utilization in the future. The raw data underlying this analysis is available at https://www.sandia.gov/energystoragesafety/rd-data-repository/.
Citation: R.M. Wittman, M. Dubarry, S. Ivanov, B. W. Juba, J. Roman-Kustas, A. Fresquez, J. Langendorf, R. Grant, G. Taggart, B. Chalamala, Y. Preger “Characterization of Cycle-Aged Commercial NMC and NCA Lithium-ion Cells: I. Temperature-Dependent Degradation” J. Electrochem. Soc. 170 120538,
DOI 10.1149/1945-7111/ad1450.