Does the addition of a heteropoly acid change the water percolation threshold of PFSA membranes

摘要: A large system containing heteropoly acids (HPAs) and Nafion® 117 was simulated studied to verify whether the additive particles affect formation of water percolating network or not. Two structures HPA were considered as dopants, i.e. H9AlW6O24 H3PW12O40. The SAXS simulation revealed that particle addition membrane matrix leads an increased order in abundance size hydrophilic region beside expansion distance between ionic domains. morphological assessment shows phase domains HPA-doped spaced further apart than undoped membrane. These results show adding PFSA reduces so-called dead-pockets makes channels more interconnected. For Nafion®, hydration level (λp) 5.63. In other words, according these results, approximately 8 wt% molecules are required establish a spanning network. H3PW12O40 directly influence morphology clusters reduce by 10.12% 17.41% reach percolation threshold, respectively.