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Double-network polyelectrolyte-based hydrogels for ionic current rectification
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DOI：10.1098/rsfs.2025.0044.png)
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Abstract
En 中文
Recently, ionic diodes have garnered significant attention due to their potential applications in flexible electronics and implantable bioelectronics, where conventional semiconductor-based devices face inherent limitations. Here, we report a dual-network hydrogel-based ionic diode composed of polyvinyl alcohol and polyacrylamide matrices incorporating cationic polydiallyldimethylammonium and anionic poly(sodium 4-styrenesulfonate) polyelectrolytes. The system is fabricated via chemical and freeze-thaw crosslinking, achieving a synergistic balance of mechanical integrity and ionic mobility. The optimized device exhibits a very high current rectification ratio of 53.9, attributed to enhanced interfacial ion transport. This strategy enables scalable fabrication of robust ionic diodes, offering a versatile platform for next-generation ionic devices and flexible bioelectronic systems.
Keywords:
ionic diode
polyelectrolyte hydrogel
flexible ionotronics
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