We first discuss the phase equilibria of the SEI components to obtain their accessible range of electrochemical conditions or voltages vs. Li/Li + . Then, we present the native defect chemistry of the SEI components under the identified electrochemical conditions, including the defect formation energy, the equilibrium Fermi energy, the defect concentration, and the net free charge carrier concentration. We predict the electronic conductivity of the SEI components based on the predicted carrier concentrations and estimated carrier mobilities.