Design Guidelines of Stretchable Pressure Sensors‐Based Triboelectrification

Abstract

In this paper, a comprehensive study for a stretchable self-powered pressure sensor is presented to investigate the structural parameters effect on the sensor sensitivity, and the pressure sensor is designed based on a vertical contact-separation mode triboelectric nanogenerator (TENG). By addressing the solid mechanics, electrical, and surface science effects, we discussed the fundamental physics of the TENG pressure sensor. Modeling and simulation by finite element method (FEA) are conducted to clarify the effects of the structural dimensions on the performance of the pressure sensor. In addition, the relationship between the deformation of an interfacial micro-nano structure and the applied pressure on a triboelectric energy harvester (TEH) is analyzed for different microstructures patterns and dimensions. Finally, a comparison is conducted between TENG pressure sensor based on the contact-separation mode (CS) and single electrode mode (SE). The results show that both structure sizes of the pressure sensor and TENG operating modes have a significant influence on the pressure sensitivity of the sensor.

Integrated Triboelectric Nanogenerators in the Era of the Internet of Things

“…A critical factor independent of the triggering conditions might be the charge density on the two triboelectric surfaces. [7,22,71,98] Quantitative techniques have to be developed to accurately measure the surface charge density to understand how the In the second stage, a power management unit with energy storage capacity will ensure optimal functionalities for distributed sensing networks. Finally, a network infrastructure has to be established for linking, monitoring and manipulating functionalities powered by a network of distributed TENG devices for multiple applications within the context of smart city design.…”

“…The output power density and energy conversion efficiency are parameters often used to compare the performance of different TENG designs, but the challenge is that these parameters are highly dependent on triggering conditions. A critical factor independent of the triggering conditions might be the charge density on the two triboelectric surfaces . Quantitative techniques have to be developed to accurately measure the surface charge density to understand how the surface structures, such as the roughness, dielectric properties, and presence of nanoparticles, affect the magnitude of the surface charge density.…”

“…In recent years, the triboelectric nanogenerator (TENG) has developed as a capable concept for the use of multiple forms of renewable energy in the ambient environment. [4][5][6][7] A triboelectric nanogenerator relies on contact electrification coupled with electrostatic induction between two media for energy conversion from dynamic stimuli. First introduced by the Wang research group in 2012, the electrical output of a TENG is generated from the discharge of amassed static charges.…”

Toward High‐Performance Triboelectric Nanogenerators by Engineering Interfaces at the Nanoscale: Looking into the Future Research Roadmap

“…TENGs can convert mechanical into electrical energy based on the coupling of the triboelectric and electrostatic effects in a triboelectric nanogenerator, where contact between two materials with different triboelectric polarities leads to charge transfer at their contact area/interface based on the displacement current according to Maxwell’s equations. [ 4–11 ] Note here that the contact area is the area between the two materials with their macroscale characteristics. However, this contact area has nanoscale interfaces that determine the final impact on the TENG’s properties.…”

An Ultra‐Shapeable, Smart Sensing Platform Based on a Multimodal Ferrofluid‐Infused Surface

“…As a new self-powered sensing technology, the established triboelectric nanogenerator (TENG), based on a coupled effect of triboelectrification and electrostatic induction is a promising type of sensing platform because of their simple fabrication, small size, low cost, and lightweight. [9][10][11][12][13][14][15][16] Lately, based on thin-film approach, there are various types of self-powered sensors, including, motion, pressure, tactile, strain, acoustics and magnetic sensors are reported. [7,[17][18][19][20][21][22][23][24][25][26] However, these devices have constrained sensing capabilities, restricted deformable ability, and limited durability which cannot satisfy the requirements raised by the rapid advance of smart wearables.…”