posted on 2024-02-14, 06:04authored byZhipeng Zheng, Xiongchao Ma, Mingyu Lu, Hao Yin, Lei Jiang, Yiping Guo
Merging
textiles with advanced energy harvesting technology via
triboelectric effects brings novel insights into self-powered wearable
textile electronics. However, fabrication of a comfortable textile-based
triboelectric nanogenerator (TENG) with high outputs remains challenging.
Herein, we propose a highly flexible, tailorable, single-electrode
all-textile TENG (t-TENG) with both wear comfort and high outputs.
A dielectric modulated porous composite coating containing poly(vinylidene
fluoride)-hexafluoropropylene copolymer and barium titanate nanoparticles
is constructed on conductive fabric to counterpart with highly positive
glass fiber fabric through knotted yarn bonding, maintaining the superiority
of textiles and strong triboelectricity. Through the synergistic optimization
of charge storage via dielectric modulation and charge dissipation
offset by electrical poling, remarkable outputs (261 V, 1.5 μA,
and 12.7 nC) are obtained from a miniaturized, lightweight t-TENG
(2 × 2 cm2, 130 mg) with an instantaneous power density
of 654.48 mW·m–2, as well as excellent electrical
robustness and device durability over 20,000 cycles. The t-TENG also
exhibits a high sensitivity of 3.438 V·kPa–1 in the force region (1–10 N), demonstrating great potential
in TENG-based intelligent sports sensing applications for monitoring
and correcting the basketball shooting hand and foot arch posture.
Furthermore, over 110 light-emitting diode arrays can be lightened
up by gently tapping this miniaturized t-TENG. It also offers a wearable
power source scheme through integrating the single-electrode device
into clothing and utilizing the skin as the grounded electrode, revealing
its ease of integration and biomechanical energy harvesting capability.
This work provides an attractive paradigm for next-generation textile
electronics with well-balanced device performance and wear comfort.