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Fully biocompatible, thermally drawn fiber supercapacitors for long-term bio-implantation.

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Název: Fully biocompatible, thermally drawn fiber supercapacitors for long-term bio-implantation.
Autoři: Jeon, Sungha, Seo, Hyeonyeob, Kim, Yeji, Choi, Youngin, Lee, Youngbin, Jung, Youngmin, Lee, Somin, Lee, Jung Tae, Park, Seongjun
Zdroj: Nature Communications; 9/2/2025, Vol. 16 Issue 1, p1-12, 12p
Témata: BIOCOMPATIBILITY, SUPERCAPACITORS, FIBERS, STABILITY (Mechanics), FABRICATION (Manufacturing), ENERGY storage, BIOELECTRONICS
Abstrakt: Recent advancements in implantable bioelectronic devices have increased the demand for biocompatible energy sources with long-term electrochemical and mechanical stability. Here, we present a tough hydrogel-based supercapacitor (THBS) fiber, fabricated via a thermal drawing process (TDP), that enables the integration of all components—electrodes, electrolyte, current collectors, and encapsulation—into a single, unified, and mechanically robust fiber-shaped architecture. Through thermal/mechanical optimization and the incorporation of self-healing properties, THBS fibers exhibit durable, high electrochemical performance under dynamic, high-curvature deformations mimicking in vivo physiological motions. Despite a thickness of only a few hundred microns, they maintain mechanical and electrochemical stability. Long-term functionality was confirmed over five weeks with minimal immune response. In vivo implantation demonstrated successful LED operation in a freely moving mouse, and successful optogenetic stimulation of both central and peripheral nervous systems. These results underscore the promise of THBS fibers as next-generation, fully biocompatible energy storage devices for advanced implantable bioelectronic systems. Implantable energy devices must ensure biocompatibility and electrochemical safety. Here, the authors present a fiber-based supercapacitor with high durability and flexibility, enabling seamless implantation and reliable long-term operation. [ABSTRACT FROM AUTHOR]
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Databáze: Complementary Index
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Abstrakt:Recent advancements in implantable bioelectronic devices have increased the demand for biocompatible energy sources with long-term electrochemical and mechanical stability. Here, we present a tough hydrogel-based supercapacitor (THBS) fiber, fabricated via a thermal drawing process (TDP), that enables the integration of all components—electrodes, electrolyte, current collectors, and encapsulation—into a single, unified, and mechanically robust fiber-shaped architecture. Through thermal/mechanical optimization and the incorporation of self-healing properties, THBS fibers exhibit durable, high electrochemical performance under dynamic, high-curvature deformations mimicking in vivo physiological motions. Despite a thickness of only a few hundred microns, they maintain mechanical and electrochemical stability. Long-term functionality was confirmed over five weeks with minimal immune response. In vivo implantation demonstrated successful LED operation in a freely moving mouse, and successful optogenetic stimulation of both central and peripheral nervous systems. These results underscore the promise of THBS fibers as next-generation, fully biocompatible energy storage devices for advanced implantable bioelectronic systems. Implantable energy devices must ensure biocompatibility and electrochemical safety. Here, the authors present a fiber-based supercapacitor with high durability and flexibility, enabling seamless implantation and reliable long-term operation. [ABSTRACT FROM AUTHOR]
ISSN:20411723
DOI:10.1038/s41467-025-63649-y