“…In this specific model, the migration process is negligible, and the processes represented here are limited by diffusion transport. It is important because it is possible to apply the 2nd Fick's law 185 Actuator 26,28,29,54,58,59,68,78,90,109-114,116-119,128,130,131,133,136,138-141 H + 26,29,54,90,109,112,113,128,130,135,137 Nafion/Au 34,58,59,78,[132][133][134] Energy Harvesting 52,53,115,120,121,129,135,137,142 Na + 26,29,34,54,59,68,110,116,119,120,129,133,134,137-140,144 Nafion/Pd [135][136][137][138][139] Sensoring 34,122,134,143 Li + 26,29,34,54,90,137 Nafion/Ag 52,53 K + , 26,29 Mg 2+ 29 Nafion/Au-Pt 34 Ca 2+ , 29 Sensoring 132 Li + 73,132,157 PVA/rGO-PANI 154 Transducer 86 Na + 85,159 PVA/rGO-CNT 156 Unspecified 157 TBA + 132 Pt-Pd (unspecified membrane) 157 EMIM-Tf 86 EVOH-g-SPEG/Ag/ 158 Kraton/Pt, 159…”