Redox oscillations in 18650-type lithium-ion cell revealed by in operando Compton scattering imaging

Abstract

Compton scattering imaging using high-energy synchrotron x-rays allows the visualization of the spatio-temporal lithiation state in lithium-ion batteries probed in-operando. Here, we apply this imaging technique to the commercial 18650-type cylindrical lithium-ion battery. Our analysis of the lineshapes of the Compton scattering spectra taken from different electrode layers reveals the emergence of inhomogeneous lithiation patterns during the charge-discharge cycles. Moreover, these patterns exhibit oscillations in time where the dominant period corresponds to the time scale of the charging curve.

11 pages, 5 figures

References in corpus (3)

• Extracting the Redox Orbitals in Li Battery Materials with High-Resolution X-Ray Compton Scattering Spectroscopy
• Identifying a descriptor for d-orbital delocalization in cathodes of Li batteries based on x-ray Compton scattering
• Identification of ferrimagnetic orbitals preventing spinel degradation by charge ordering in Li${}_x$Mn${}_2$O${}_4$