fig6

Figure 6. (A and B) ⁷Li-⁷Li 2D NMR spectra of (A) 50 wt % Neat LLZO NP and (B) 50 wt % APTES@LLZO NP composite membranes; (C) ⁷Li-¹H CPMAS spectra showing Li⁺-PEO interactions for both samples; (D and E) ⁶Li NMR spectra of the composite samples before and after ⁶Li||⁶Li symmetric cell cycling. LLZO: Li₇La₃Zr₂O₁₂; NPs: Nanoparticles; NMR: Nuclear magnetic resonance; APTES: (3-aminopropyl)triethoxysilane; CPMAS: Cross-polarization magic-angle spinning; PEO: Poly (ethylene oxide).