Figure 2

Thermal sweep AC impedance measurements of S-IL@ZIF-8 composite. (a) Temperature-programmed thermal sweep protocol for impedance measurements of S-IL@ZIF-8 composite. Purple diamonds with lower half filled indicate the isothermal, three fifteen-minutes spaced runs at each equilibrated temperature step. (b–e) Nyquist plots of each heating and cooling cycle, where the blue to red transition indicates increasing the temperature from 25 °C to 85 °C with 10 °C increments. At each temperature step, the first, second and third run is indicated with square, circle and triangle symbols, respectively. The error bars are too small to be seen in this scale; corresponding error bars are shown in Fig. S4 at different scaling. Insets in Fig. 2b–e show semicircles above 55 °C. The solid lines are a guide for the eye.