Dendrite-free lithium–metal batteries at high rate realized using a composite solid electrolyte with an ester–PO 4 complex and stable interphase

PO 4 3− –ester interactions realize dendrite-free Li deposition in PCL–LAGP, evidenced by galvanostatic cycling and in situ TEM observations. The corresponding battery achieves high coulombic efficiency ∼100% and a rate capability ≥10C.