A high-current hydrogel generator with engineered mechanoionic asymmetry.
In: Nature Communications, Jg. 15 (2024-02-19), S. 1-10
Online
academicJournal
Zugriff:
Mechanoelectrical energy conversion is a potential solution for the power supply of miniaturized wearable and implantable systems; yet it remains challenging due to limited current output when exploiting low-frequency motions with soft devices. We report a design of a hydrogel generator with mechanoionic current generation amplified by orders of magnitudes with engineered structural and chemical asymmetry. Under compressive loading, relief structures in the hydrogel intensify net ion fluxes induced by deformation gradient, which synergize with asymmetric ion adsorption characteristics of the electrodes and distinct diffusivity of cations and anions in the hydrogel matrix. This engineered mechanoionic process can yield 4 mA (5.5 A m −2 ) of peak current under cyclic compression of 80 kPa applied at 0.1 Hz, with the transferred charge reaching up to 916 mC m −2 per cycle. The high current output of this miniaturized hydrogel generator is beneficial for the powering of wearable devices, as exemplified by a controlled drug-releasing system for wound healing. The demonstrated mechanisms for amplifying mechanoionic effect will enable further designs for a variety of self-powered biomedical systems. Mechanoelectric energy conversion is a potential solution for the power supply of soft devices, but the low current output for low frequency motions limits its applicability. Here, the authors report a hydrogel generator with mechanoionic current generation amplified by orders of magnitudes and its application as controlled drug-releasing system for wound healing. [ABSTRACT FROM AUTHOR]
Copyright of Nature Communications is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Titel: |
A high-current hydrogel generator with engineered mechanoionic asymmetry.
|
---|---|
Autor/in / Beteiligte Person: | Liu, Hongzhen ; Ji, Xianglin ; Guo, Zihao ; Wei, Xi ; Fan, Jinchen ; Shi, Peng ; Pu, Xiong ; Gong, Feng ; Xu, Lizhi |
Link: | |
Zeitschrift: | Nature Communications, Jg. 15 (2024-02-19), S. 1-10 |
Veröffentlichung: | 2024 |
Medientyp: | academicJournal |
ISSN: | 2041-1723 (print) |
DOI: | 10.1038/s41467-024-45931-7 |
Schlagwort: |
|
Sonstiges: |
|