Investigation of the Environmental Stability of Poly(vinyl alcohol)-KOH Polymer Electrolytes for Flexible Zinc-Air Batteries.

In conclusion, the ion conduction of the PVA–KOH GPE exhibits a decreasing trend owing to inevitable liquid electrolyte loss under air exposure conditions, which is consistent with the liquid electrolyte desorption results ( Figure 3 ).

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The voltage gap shows an increasing trend and the round-trip efficiency decreases with increasing exposure time, which is caused by water loss, ionic conductivity degradation and poor interfacial contact between the PVA–KOH membrane and the electrode ( Figures S3B–E, S4 ).

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