Experimentally identified Fig. The 36 total collected network products from four different initial conditions (+0.0V vs. Li/Li + with Li + and EC as starting species; +0.0V vs. Li/Li + with Li + , EC, and CO 2 as starting species; +0.5V vs. Li/Li + with Li + and EC as starting species; and +0.5V vs. Li/Li + with Li + , EC, and CO 2 as starting species). The 16 network products outlined in green have previously been experimentally identified in the SEI; these include the major gaseous products, molecular inorganic components, and organic components (including lithium methyl carbonate or LMC, vinyl carbonate, lithium ethyl carbonate or LEC, ethylene monocarbonate, lithium ethylene dicarbonate or LiEDC -, and lithium butylene dicarbonate or LiBDC -). Six of the network products, outlined in dotted light green, are species which have very similar spectroscopic signatures to the dominant organic components, and thus may be present in the SEI in small quantities without being detected. Two of the network products outlined in dashed purple, lithium 2-(formyloxy)ethan-1-olate or LFEO and 4,4',5,5'-tetrahydro-2,2'-bi(1,3-dioxolylidene) or bi-dioxolylidene, have not been previously reported and were subjected to further mechanistic analysis. Finally, the remaining 12 network products (which have also not been previously reported as SEI products) may be kinetically inaccessible, may indicate that our CRN is missing species or reactions, or may be true SEI products, motivating future calculations.