Journal
COMPOSITES SCIENCE AND TECHNOLOGY
Volume 208, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compscitech.2021.108733
Keywords
CNTs; PVA hydrogel; Self-healing; Triboelectric nanogenerator; Wearable electronics
Categories
Funding
- National Natural Science Foundation of China [51105223, 51735001, 51875577]
- Science Foundation of China University of Petroleum [2462020YXZZ018, 2462019QNXZ02]
- Tribology Science Fund of State Key Laboratory of Tribology [SKLTKF15A02]
- U.S. National Science Foundation [2004251]
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [2004251] Funding Source: National Science Foundation
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This study introduces a high-performance hydrogel-based self-healing triboelectric nanogenerator that can quickly self-heal in a short period of time and has superior output performance, suitable for wearable electronic devices.
Self-healing triboelectric nanogenerators (SH-TENGs) with fast self-healing, high output performance, and wearing comfort have wide and promising applications in wearable electronic devices. This work presents a highperformance hydrogel-based SH-TENG, which consists of a high dielectric triboelectric layer (HDTL), a selfhealing hydrogel electrode layer (SHEL), and a physical cross-linking layer (PCLL). Carbon nanotubes (CNTs), obtained by a chemical vapor deposition (CVD) method, were added into polydimethylsiloxane (PDMS) to produce the HDTL. Compared with pure PDMS, the short-circuit transferred charge (44 nC) and the open circuit voltage (132 V) are doubled for PDMS with 0.01 wt% CNTs. Glycerin, polydopamine particles (PDAP) and graphene were added to poly (vinyl alcohol) (PVA) to prepare the self-healing hydrogel electrode layer. SHEL can physically self-heal in similar to 1 min when exposed to air. The self-healing efficiency reaches up to 98%. The PCLL is made of poly(methylhydrosiloxane) (PMHS) and PDMS. It forms a good physical bond between the hydrophilic hydrogel and hydrophobic PDMS layers. The electric output performance of the SH-TENG can reach 94% of the undamaged one in 1 min. The SH-TENG (6 x 6 cm(2)) exhibits good stability and superior electrical performance, enabling it to power 37 LEDs simultaneously.
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