Increasing surface charge density by effective charge accumulation layer inclusion for high-performance triboelectric nanogenerators

Ravichandran, Aravind; Ramuz, Marc; Blayac, S.

doi:10.1557/mrc.2019.64

Cited by 19 publications

(8 citation statements)

References 27 publications

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“…The first strategy attempts to increase the surface charge density as it is directly related to the current, voltage, output energy, and power of TENGs. The surface charge density can be increased by selecting new materials, which have high surface charge density from the triboelectric series or any materials (e.g., oxides and nitrides) from the periodic table and polymers. − In addition, surface modification, which includes physical modification, , chemical surface functionalization, − and surface ion injection, − is also considered for the surface charge density increment. Furthermore, the performance of the TENG’s output can also be improved by filling some special fillers into the triboelectric layers. − The optimization of particulate fillers can effectively improve the charge trapping ability and improve the TENG’s output.…”

Section: Introductionmentioning

confidence: 99%

High-Performance and Low-Cost Overhead Projector Sheet-Based Triboelectric Nanogenerator for Self-Powered Cholesteric Liquid Crystal, Electroluminescence, and Portable Electronic Devices

Potu

Navaneeth

Rajaboina

et al. 2022

ACS Appl. Energy Mater.

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Low output power, intricate device designs, limitation on scalability, limited production capability, and higher fabrication cost are the major hurdles to use triboelectric nanogenerators (TENGs) as a power source in self-powered device applications. This work reports a highperformance, simple design, and inexpensive TENG using overhead projector (OHP) sheets and ZnO nanosheet array films. The fabricated TENG produced a maximum output voltage, current, and power density of ∼292 V, ∼55 μA, and ∼424.8 mW/m 2 for each hand slapping force, respectively. The charged nature of one side of the OHP sheet is responsible for obtaining the high-power density reported in this communication. Further, the TENG has shown excellent stability over a period of 6 months and more than 10,000 test cycles. The stability of ZnO nanosheets is excellent even the after 10,000 test cycles. The TENG's AC output is utilized to control the optical characteristics of the cholesteric liquid crystal (CLC) devices. CLC devices are demonstrated for mobile security, optical switch, webcam security, and self-powered smart windows or e-paper displays. Further, we have demonstrated self-powered electroluminescence and portable electronic devices. The current work has potential applications in portable, wearable, and self-powered electronic devices due to its high power density, simple design, minimal cost, and scalability.

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Section: Introductionmentioning

confidence: 99%

High-Performance and Low-Cost Overhead Projector Sheet-Based Triboelectric Nanogenerator for Self-Powered Cholesteric Liquid Crystal, Electroluminescence, and Portable Electronic Devices

Potu

Navaneeth

Rajaboina

et al. 2022

ACS Appl. Energy Mater.

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“…It also drove a more considerable amount of charge through the external load per cycle favorable for charging energy-storage devices. A significant effect of the thin parylene-C film in improving the output performance of TENG by a factor of 10 when introduced on bare PTFE film was reported by Ravichandran et al [ 100 ]. The parylene-C film was deposited to improve the charge accumulation by receiving more charges, thus enhancing the surface charge density by up to 70.2 µC/m 2 , which is 140 times higher than that of the initial results.…”

Section: Enhancement Of Triboelectric Charge Densitymentioning

confidence: 98%

Structural and Chemical Modifications Towards High-Performance of Triboelectric Nanogenerators

et al. 2021

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Harvesting abundant mechanical energy has been considered one of the promising technologies for developing autonomous self-powered active sensors, power units, and Internet-of-Things devices. Among various energy harvesting technologies, the triboelectric harvesters based on contact electrification have recently attracted much attention because of their advantages such as high performance, light weight, and simple design. Since the first triboelectric energy-harvesting device was reported, the continuous investigations for improving the output power have been carried out. This review article covers various methods proposed for the performance enhancement of triboelectric nanogenerators (TENGs), such as a triboelectric material selection, surface modification through the introduction of micro-/nano-patterns, and surface chemical functionalization, injecting charges, and their trapping. The main purpose of this work is to highlight and summarize recent advancements towards enhancing the TENG technology performance through implementing different approaches along with their potential applications. Graphic Abstract This paper presents a comprehensive review of the TENG technology and its factors affecting the output power as material selection, surface physical and chemical modification, charge injection, and trapping techniques.

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“…[ 6,23,57,61–66 ] The triboelectric charge transfer can be favored or enhanced by different nanostructuring/patterning techniques, by acting on the surface roughness, the porosity, and the wettability properties. [ 67–72 ] Polymers are widely used for TSs for their flexibility and deformability. In this work parylene C (poly(para‐xylylene)) was selected because of its attractive properties, [ 73,74 ] such as FDA‐approved biocompatibility, chemical inertness, optimal conformality, barrier properties, anticorrosive/antibiofouling behavior, and high flexibility.…”

Section: Introductionmentioning

confidence: 99%

Conformal, Ultra‐thin Skin‐Contact‐Actuated Hybrid Piezo/Triboelectric Wearable Sensor Based on AlN and Parylene‐Encapsulated Elastomeric Blend

Mariello

Fachechi

Guido

et al. 2021

Adv Funct Materials

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Flexible electronics based on piezoelectric/triboelectric devices is an attractive technology for human sensing. Their hybridization overcomes the limitations of single components, resulting in compliant skin sensors with enhanced performances and applicability. Such hybrid devices are typically based on wide‐area scarcely durable polymers or lead‐containing piezoelectric materials; they are often not biocompatible and poorly skin‐adaptable, lacking in multifunctionality. In this work, a novel compliant, conformal hybrid piezoelectric‐triboelectric ultra‐thin wearable sensor made of biocompatible materials is reported. The device is in contact with skin through an ultra‐soft patch covered on both sides by a thin friction parylene film. Its working principle is unprecedently based on three simultaneous, complementary and mutually enhancing effects: piezoelectric, skin‐contact‐actuation, and piezo‐tribo hybrid contact. The device can detect, with high sensitivity and wide measurement range, both the impulsiveness of sudden motions and the slower micro‐friction phenomena due to skin deformations, ensuring a stable and repeatable identification of bio‐signals typical of body movements. The device multifunctionality is shown for identifying gait walking, distinguishing hand gestures with a 5‐sensor system on the hand back, and monitoring human joints motions (neck, wrist, elbow, knee, ankle). The assessed energy harvesting capabilities demonstrate the suitability for fabrication of more complex self‐powered sensing systems.

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Increasing surface charge density by effective charge accumulation layer inclusion for high-performance triboelectric nanogenerators

Abstract: Abstract

Cited by 19 publications

References 27 publications

High-Performance and Low-Cost Overhead Projector Sheet-Based Triboelectric Nanogenerator for Self-Powered Cholesteric Liquid Crystal, Electroluminescence, and Portable Electronic Devices

High-Performance and Low-Cost Overhead Projector Sheet-Based Triboelectric Nanogenerator for Self-Powered Cholesteric Liquid Crystal, Electroluminescence, and Portable Electronic Devices

Structural and Chemical Modifications Towards High-Performance of Triboelectric Nanogenerators

Conformal, Ultra‐thin Skin‐Contact‐Actuated Hybrid Piezo/Triboelectric Wearable Sensor Based on AlN and Parylene‐Encapsulated Elastomeric Blend

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