Solid-electrolyte-interphase (SEI) of lithium metal anode (LMA) in different electrolytes have been studied using synchrotron-base x-ray diffraction (XRD) and pair distribution function (PDF) analysis, aiming to the identification and differentiation of two elusive components LiH and LiF. LiH is identified as a component of SEI in high abundance by XRD, and the possibility of its misidentification as LiF in the literature is discussed. Differing from bulk LiF, the SEI (LiF)s is found to have unique structural features including larger lattice parameter and smaller grain size (
Published: June 4, 2021
Citation
Shadike Z., H. Lee, O. Borodin, X. Cao, X. Fan, X. Wang, and R. Lin, et al. 2021.Identification of LiH and nanocrystalline LiF in the solid–electrolyte interphase of lithium metal anodes.Nature Nanotechnology 16.PNNL-SA-157884.doi:10.1038/s41565-020-00845-5