As shown in Figure , the long-term cycling of the Li|SPE10:1:1-CL|Li cell cycled at 0.1 mA cm -2 for 1 hour polarisation demonstrated very stable performance, maintaining an overpotential of 60 mV over 130 cycles at 50°C, with no evidence of short circuit. This indicates that crosslinked SPE10:1:1-CL is highly compatible with the Li metal electrode. The interfacial resistance decreases after 130 cycles (shown in Figure ), suggesting the formation of an ion-conductive and stable SEI layer at the electrode/electrolyte interface. In contrast, the Li|SPE10:1:1|Li cell exhibits a steady increase in overpotential and a short circuit after just 60 cycles. The impedance spectra also showed an increase in interfacial resistance upon successive cycling as seen in Figure .