Figure 7.

(a) EIS spectra at open-circuit voltage (OCV) of Zn–MnO₂ cells containing liquid KOH and hydrogel. The hydrogel-containing cells had two variations. The cells were presoaked with liquid KOH electrolyte and decanted before gelling or were directly gelled with no presoaking. (b) EIS spectra of Zn–MnO₂ cells containing liquid and hydrogel cycled 5 times. The hydrogel-containing cells had two variations. The cells were presoaked and decanted before gelling or cells were directly gelled with no presoaking.