The study of Hood et al. proposed a di↵erent component distribution in the SEI structure. A Li-metal tip was put in contact with a LiPON surface and then removed to observe the interfacial evolution. Using in situ electron energy-loss spectroscopy (EELS), the authors found that the elements Li and O are distributed throughout the SEI and P is absent near the Li metal contact point, which agrees with the above studies. The di↵erence is that N is dispersed in the SEI, indicating that Li 3 N is present throughout the SEI. However, it is also observed from the EELS elemental maps that the N shows a grid-like or scattered distribution in the SEI layer, in line with the stoichiometric scarcity of Li 3 N produced from the LiPON decomposition (Eq. 1). Such scarcity and the scattered distribution may not create an electrically continuous path, so the "electrically disconnected" Li 3 N particles cannot make the overall SEI electronically conductive.