Screen-printed soft triboelectric nanogenerator with porous PDMS and stretchable PEDOT:PSS electrode

Abstract

The recent development on wearable and stretchable electronics calls for skin conformable power sources that are beyond current battery technologies. Among the many novel energy devices being explored, triboelectric nanogenerator (TENG) made from intrinsically stretchable materials has a great potential to meet the above requirement as being both soft and efficient. In this paper, we present a lithography-free and low-cost TENG device comprising a porous-structured PDMS layer and a stretchable PEDOT:PSS electrode. The porous PDMS structure is formed by using self-assembled polystyrene beads as the sacrificial template and it is highly ordered with great uniformity and high structural stability under compression force. Moreover, the porous PDMS TENG exhibits improved output voltage and current of 1.65 V and 0.54 nA compared to its counterpart with non-porous PDMS with 0.66 V and 0.34 nA. The effect of different loading force and frequency on the output response of the TENG device has also been studied. This work could shed light on diverse structural modification methods for improving the performance of PDMS-based TENG and the development of intrinsically stretchable TENG for wearable device applications.

Highly stretchable sensing array for independent detection of pressure and strain exploiting structural and resistive control

“…This is the reason the device requires a thickness of 2 mm to create a sufficient porous network using caster sugar. Polystyrene beads 30 and polymethyl methacrylate (PMMA) 31 can be used instead of caster sugar to decrease the thickness for practical use of the device. The processing method of the pore structure composed of smaller holes using these materials have been demonstrated in other studies 30,31 .…”

Combination of Piezoelectric and Triboelectric Devices for Robotic Self-Powered Sensors

“…The second method is to use a porous structure or a material with low Young’s modulus as the contact surface material. The use of a porous structure can reduce the material density, improve the deformability of the sensor [ 96 , 97 ], and increase the initial distance between the two contact surfaces. In addition to the above-mentioned methods, recent studies have used the external-charge pumping method to increase the charge density of the friction layer and thereby increase the TENG output [ 98 ].…”

Capacitive biosensor based on vertically paired electrodes for the detection of SARS-CoV-2

“…Additionally, a computer simulation was performed using VPEs with different numbers of electrode pairs and various VPE electrode gaps. The electrode was fabricated using a conductive polymer layer of PEDOT:PSS instead of Ag and Pt metal electrodes ( Butina et al, 2019 ; Dauzon et al, 2019 ; Lee and Kim, 2018 ; Wan et al, 2019 ), and the VPE fabrication yield was effectively etched using a reactive dry etching process. Finally, a VPE with multiple electrode pairs was applied for SARS-CoV-2 NP detection ( Bong et al, 2021 ; Pollock et al, 2021 ; Zhang et al, 2020 ).…”