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Behaviors of nafion-based actuators are significantly affected by interfacial area between electrode and polymer electrolyte. Replication method was utilized to manufacture a large surface-area composite actuator. Etched aluminum foil was used as a template for replication using liquid nafion solution. Measurement of double layer charging and scanning electron microscopy indicated that interfacial area was greatly increased by replication method. Higher surface area induced a better bending performance of ionic polymer metal composite (IPMC). In parallel, the effect of cations on IPMC was interpreted with constant current experiment, linear sweep voltammetry and electrochemical impedance spectroscopy. For univalent cations, ion size is the most influencing parameter on ionic mobility inside membrane. However, ion-ion interaction affects an ionic mobility for divalent cations.
Taegeun Noh,Yong Suk Tak,Jaedo Nam,Jaewook Jeon,Hunmo Kim,Hyoukryeol Choi, andSang Sik Bae
"Development of large-surface Nafion-metal composite actuator and its electrochemical characterization", Proc. SPIE 4329, Smart Structures and Materials 2001: Electroactive Polymer Actuators and Devices, (16 July 2001); https://doi.org/10.1117/12.432661
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Taegeun Noh, Yong Suk Tak, Jaedo Nam, Jaewook Jeon, Hunmo Kim, Hyoukryeol Choi, Sang Sik Bae, "Development of large-surface Nafion-metal composite actuator and its electrochemical characterization," Proc. SPIE 4329, Smart Structures and Materials 2001: Electroactive Polymer Actuators and Devices, (16 July 2001); https://doi.org/10.1117/12.432661