Modulating electrostatic barriers at β-Li3PS4/LixCoO2 interfaces through LiAlO2 interlayer in an all-solid-state battery

(a) the Li+ diffusion pathways and (b) corresponding energy barriers in γ-LiAlO2 (Fig. S1); chemical potential diagram for LAO (Fig. S2); Formation energies of the Li defects in bulk LAO as a function of EF under (a) the most Li-rich (Δ"μ" _"Li" =−0.20 eV) and (b) the most Li-poor (Δ"μ" _"Li" =−3.70 eV) conditions (Fig. S3); Charge-neutrality Fermi level EF for LAO as a function of voltage (vs. Li+/Li) (Fig. S4); The vacuum-aligned position of the electronic bands in LPS, LAO, and LCO before contact (Fig. S5); Energy changes of the corresponding reactions at LPS/LCO, LPS/LAO, and LAO/LCO interfaces (Table S1).