For example, 6 different AEMs showed an initial drop in the conductivity, when the solution was changed from water to 0.5 M KOH (it should be cautioned that this could also be related to the different measurement methods, in-plane conductivity in water, and through-plane conductivity in KOH solutions), and then an increasing trend between 0.5 and 4 M KOH. 121 In this range, the effect of the absorbed KOH on the conductivity is stronger than that of the reduced water uptake ( Figure 11 a).
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