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Issue 23, 2019
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Highly efficient self-healable and dual responsive hydrogel-based deformable triboelectric nanogenerators for wearable electronics

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Abstract

Self-healable soft conductors, which can withstand certain degrees of deformation and can recover from damage spontaneously, are essential for wearable applications. In this work, a soft hydrogel based self-healing triboelectric nanogenerator (HS-TENG), which is highly deformable, and both mechanically and electrically self-healable, has been successfully fabricated from a poly(vinyl alcohol)/agarose hydrogel. The incorporation of photothermally active polydopamine particles and multiwalled carbon nanotubes (MWCNTs) allows the HS-TENG to be physically self-healed in ∼1 min upon exposure to near-infrared (NIR) light. At the same time, the chemical self-healing of the HS-TENG can be triggered by water spraying at 25 °C when introducing water-active dynamic borate bonds into the hydrogel. The applicability of the HS-TENG as a soft energy device to harvest human motion energies has been demonstrated. By tapping the HS-TENG with various deformations, the rectified electricity can charge commercial LEDs with sustainable energy. Working in single-electrode mode, the electrical outputs of the HS-TENG in terms of short-circuit transferred charge (Qsc), open circuit voltage (Voc) and short-circuit current (Isc) reach ∼32 nC, ∼95 V and ∼1.5 μA, respectively, and remain stable even with 200% strain since the MWCNTs disperse evenly in the matrix and play the role of conductive fillers in the HS-TENG.

Graphical abstract: Highly efficient self-healable and dual responsive hydrogel-based deformable triboelectric nanogenerators for wearable electronics

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Publication details

The article was received on 12 Mar 2019, accepted on 08 Apr 2019 and first published on 08 Apr 2019


Article type: Paper
DOI: 10.1039/C9TA02711D
J. Mater. Chem. A, 2019,7, 13948-13955

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    Highly efficient self-healable and dual responsive hydrogel-based deformable triboelectric nanogenerators for wearable electronics

    Q. Guan, G. Lin, Y. Gong, J. Wang, W. Tan, D. Bao, Y. Liu, Z. You, X. Sun, Z. Wen and Y. Pan, J. Mater. Chem. A, 2019, 7, 13948
    DOI: 10.1039/C9TA02711D

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