A Stretchable Solid Ionic Electrode-Based Triboelectric Nanogenerator for Biomechanical Energy Harvesting and Self-Powered Sensors

作者：Bo, Xiangkun; Wang, Lingyun; Zhao, Hong; Almardi, Jasim M. M.; Li, Weilu; Daoud, Walid A. A.^*

来源：Small, 2023, 19(38).

DOI：10.1002/smll.202303415

• adhesion
• all-solid-state
• stretchable ionic electrodes
• triboelectric nanogenerators

Stretchable power devices and self-powered sensors have become increasingly desired for wearable electronics and artificial intelligence. In this study, an all-solid-state triboelectric nanogenerator (TENG) is reported, whose one solid-state structure prevents delamination during stretch and release cycles and increasing the patch adhesive force (3.5 N) and strain (586% elongation at break). Through the synergetic virtues of stretchability, ionic conductivity, and excellent adhesion to the tribo-layer, reproducible open-circuit voltage (V-OC) of 84 V, charge (Q(SC)) of 27.5 nC, and short-circuit current (I-SC) of 3.1 mu A after drying at 60 degrees C or 20,000 contact-separation cycles are obtained. Apart from contact-separation, this device shows unprecedented electricity generation through stretch-release of solid materials leading to a linear relationship between V-OC and strain. For the first time, this work provides a clear explanation of the working mechanism of contact-free stretching-releasing and investigates the relationships of exerted force, strain, thickness of the device, and electric output. Benefitting from the one solid-state structure, this contact-free device remains stable even after repeated stretch-release cycling, maintaining 100% of its V-OC after 2500 stretch-release cycles. These findings provide a strategy toward highly conductive and stretchable electrodes for harvesting mechanical energy and health monitoring.

• 单位
  佛山科学技术学院