A High‐Performance Flexible Triboelectric Nanogenerator Based on Double‐Sided Patterned TiN/PDMS Composite Film for Human Energy Harvesting

Abstract

The flexible triboelectric nanogenerator (TENG) has promising applications in portable electronic devices and micro wireless sensors. However, complex fabrication processes, high cost, and difficulty in coupling with the human body are still the challenges for the further development of TENG. Herein, a flexible double‐sided patterned titanium nitride/polydimethylsiloxane (DSP‐TiN/PDMS) composite film is prepared by a simple and low‐cost sandpaper template method. The double‐sided microporous structure on the PDMS increases the effective contact area and promotes more charge storage on the PDMS surface, thus improving the output performance of TENG. With the introduction of conductive TiN nanoparticles, the effective thickness of the composite film can be reduced, leading to the increase of the capacitance value of TENG. Therefore, the TENG fabricated under the conditions of optimized filling content and surface patterning microstructure can generate a high open‐circuit voltage of 51.8 V and a short‐circuit current of 36.8 μA, as well as a peak power of 11.25 μW. Furthermore, the proposed TENG can also achieve effective energy harvesting in human motions. This easy‐to‐prepare DSP‐TiN/PDMS composite film opens up a feasible way for the construction of high output performance TENG and presents promising applications in micro wearable devices.

A High‐Performance Flexible Arch‐Shaped Tribo‐Piezoelectric Hybrid Nanogenerator for Energy Harvesting

“…The TENG is embedded in an arch‐shaped PENG with a vertical contact separation mode. To improve the output performance of TENG, [ 30,31 ] the surface of the sandpaper template is coated with a TiN/PDMS solution containing 8 wt% TiN and then cured to obtain a TiN/PDMS film. The above method produces a surface microporous structure with irregularities, increasing the effective contact area and promoting more charge storage on the TiN/PDMS film surface.…”

“…Polyvinylidene fluoride (PVDF) film is used as a piezoelectric material and is fixed in an arch shape, the arch shape is supported by the PVC film. In our previous study, [ 30 ] the TiN/PDMS film with microstructure was prepared by the sandpaper template method, which is now used as a triboelectric film in this study. The electrodes are led from the PENG and TENG, respectively.…”

Holistic and localized preparation methods for triboelectric sensors: principles, applications and perspectives

“…Therefore, evaluating the comprehensive situation of various preparation methods is the top priority for researchers. We have consulted a large number of articles and conducted in-depth evaluations on the preparation of triboelectric sensors using 3D printing [106][107][108][109][110][111][112], MEMS technology [41,[113][114][115][116][117][118][119][120], textile processes [64,[121][122][123][124][125][126][127], template-assisted methods [128][129][130][131][132][133][134], and materials synthesis methods [86,87,[135][136][137][138]. We have proposed evaluating the various benefits of various preparation processes, including material selection (figure 8 In terms of material selection, we evaluate it from the aspects of material type, material properties, ability to prepare microstructures, ability to doped, and sustainability; in terms of technical maturity, we mainly evaluate from application cases, standardization and normalization, process stability, technology iteration speed, and industry recognition; in terms of process difficulty, we mainly evaluate the batch production capacity, complexity of process flow, difficulty in parameter control, difficulty in material processing, and yield rate; in terms of preparation efficiency, we mainly evaluate production speed, automation level, batch production capacity, process cycle time, and material utilizat...…”

Eco-friendly triboelectric nanogenerator based on degradable rape straw powder for monitoring human movement

“…e) illustrates the operational principle of RS-TENG, which is based on the principles of electrostatic induction and contact electrification[39,40]. The study employs RS/PVA as the positive triboelectric layer and PTFE as the negative triboelectric layer.…”