A single-ion-conducting lithium-based montmorillonite interfacial layer for stable lithium–metal batteries

A Li-MMT protective layer with high modulus, a high Li + transference number of 0.85 and a considerable ionic conductivity of 5.77 × 10 −4 S cm −1 can promote dendrite-free Li deposition and improve cycling stability over 1300 h for Li metal anodes.