Voltage profiles of Li/porous LLZO membrane/Li symmetric cell measured at a current density of 0.5 mA cm-2, the areal capacity limitation of 0.1 mAh cm-2per half-cycle at room temperature. The symmetric measurements shown in (a) were intentionally stopped in order to continue the cycling at a higher capacity limitation of 0.5 mAh cm-2on each half cycle while keeping the same current density of 0.5 mA cm-2(see FigureS16, Supporting Information). The cycling performance of Li/porous LLZO/Li symmetrical cells measured at higher current densities of 0.5 and 1 mA cm-2with the areal capacity limitation of 1 mAh cm-2per half-cycle and higher temperature of 75 C is shown in the Supporting Information (see FigureS17, Supporting Information).
