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High-performance piezoelectric-triboelectric hybrid nanogenerator based on stretchable, self-adhesive, and conductive hydrogels for self-powered sensing
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DOI：10.1016/j.reactfunctpolym.2025.106626.png)
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Abstract
En 中文
Stretchable, self-adhesive, and conductive hydrogels show great promise for applications in wearable sensors and energy harvesting systems. In this work, we developed an SA/P(AM-co-HEA)/TA/Ca2+-BTO (S/P/T/Ca-BTO) hydrogel by incorporating tannic acid (TA) and barium titanate (BTO) into a poly(acrylamide-co-hydroxyethyl acrylate) (P(AM-co-HEA)) network, followed by cross-linking with sodium alginate (SA) and CaCl2. The resulting hydrogel exhibited a set of compelling properties, including a tensile stress of 127.6 kPa, extreme stretchability (2328 %), excellent fatigue resistance, strong adhesion (27.3 kPa), and good electrical conductivity (2.49 S/m). A flexible strain sensor fabricated from this hydrogel demonstrated high sensitivity (GF = 2.31) and exceptional stability, showing no significant degradation over 500 loading-unloading cycles, which enables reliable longterm monitoring of human motion. Moreover, the incorporation of BTO nanoparticles was pivotal in boosting the electrical output-performance of the S/P/T/Ca-BTO hydrogel-assembled piezoelectric-triboelectric hybrid nanogenerator (SPTCB-PTENG). When encapsulated with Ecoflex 00-10 and operated in single-electrode mode, the device achieved an open-circuit voltage of 164 V, a short-circuit current of 2.8 mu A, and a transferred charge of 56.1 nC. As a self-powered sensor, the SPTCB-PTENG also exhibited durable performance and high responsiveness in recognizing handwritten information and detecting Morse code-encrypted messages. With its dual functionality in strain sensing and energy harvesting, this hydrogel enables its use as an integrated component in multifunctional wearable devices.
Keywords:
Hydrogel
Barium titanate
Piezoelectric-triboelectric hybrid
nanogenerator
Journal
R
IF:
5.1
Papers:
23
Citations:
0
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