A Sliding-Mode Triboelectric Nanogenerator with Chemical Group Grated Structure by Shadow Mask Reactive Ion Etching

Shang, Wanyu; Gu, Guang Qin; Yang, Feng; Zhao, Lei; Cheng, Gang; Du, Zongliang; Wang, Zhong Lin

doi:10.1021/acsnano.7b02866

Cited by 96 publications

(45 citation statements)

References 38 publications

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“…Furthermore, the chemical functionalization of surface contact materials can be used as a practical solution to the friction and wear due to the structural problem of slidingmode TEGs. As shown in Figure 5(d), the positively charged nylon film partially changed to negatively charged surface through the reactive ion etching (RIE) with a metal mask [103]. The surface-modified slidingmode TEGs exhibited high stability and strong durability owing to the chemical functionalization.…”

Section: Chemical Functionalization and Modificationmentioning

confidence: 99%

Modulation of surface physics and chemistry in triboelectric energy harvesting technologies

Lee

Kim

Park

et al. 2019

Science and Technology of Advanced Materials

101

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Mechanical energy harvesting technology converting mechanical energy wasted in our surroundings to electrical energy has been regarded as one of the critical technologies for self-powered sensor network and Internet of Things (IoT). Although triboelectric energy harvesters based on contact electrification have attracted considerable attention due to their various advantages compared to other technologies, a further improvement of the output performance is still required for practical applications in next-generation IoT devices. In recent years, numerous studies have been carried out to enhance the output power of triboelectric energy harvesters. The previous research approaches for enhancing the triboelectric charges can be classified into three categories: i) materials type, ii) device structure, and iii) surface modification. In this review article, we focus on various mechanisms and methods through the surface modification beyond the limitations of structural parameters and materials, such as surficial texturing/patterning, functionalization, dielectric engineering, surface charge doping and 2D material processing. This perspective study is a cornerstone for establishing next-generation energy applications consisting of triboelectric energy harvesters from portable devices to power industries.

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Section: Chemical Functionalization and Modificationmentioning

confidence: 99%

Modulation of surface physics and chemistry in triboelectric energy harvesting technologies

Lee

Kim

Park

et al. 2019

Science and Technology of Advanced Materials

101

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“…In the present case, TENG is operating in a sliding mode in the conductor‐to‐dielectric configuration (Al electrodes are conductors whereas the FEP film is a dielectric material). According to Shang et al the V oc and J sc , for the sliding mode of TENG, can be written as follows:

V_{oc} = \frac{σx}{ε_{0} ((), l - x)} \frac{d_{2}}{ε_{r 2}},

J_{sc} = \frac{d ∆ σ_{sc}}{dt},

where σ is the tribocharge surface density, ɩ is the length of the dielectric layer (in this work, the length of the FEP film), d 2 is the thickness of the dielectric layer (in this work, the thickness of the FEP film), ε 0 and ε r2 are the dielectric permittivities of vacuum and the dielectric layer (FEP), respectively, t is the time, and x is the lateral separation distance. Since the maximum power of the TENG is governed by the tribocharge surface density σ , it is reasonable to implement strategies to increase the surface charge density on the triboelectric layers.…”

Section: Design and Fabricationmentioning

confidence: 99%

“…In the present case, TENG is operating in a sliding mode in the conductor-to-dielectric configuration (Al electrodes are conductors whereas the FEP film is a dielectric material). According to Shang et al 31 the V oc and J sc , for the sliding mode of TENG, can be written as follows:…”

Section: Design and Fabrication Of Tengmentioning

confidence: 99%

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Power generation by a thermomagnetic engine by hybrid operation of an electromagnetic generator and a triboelectric nanogenerator

et al. 2019

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Summary This paper reports a thermomagnetic generator based on the magneto‐caloric effect of Gadolinium to scavenge low‐grade thermal energy and its eventual conversion into electrical energy. Gadolinium is one of the distinct materials whose Curie temperature is nearly room temperature. For this reason, a Gadolinium‐based thermomagnetic engine offers enormous possibilities to harness available waste heat from the industries. In this work, the performance of an electromagnetic generator (EMG) coupled with a triboelectric nanogenerator (TENG) was experimentally investigated as it is driven by a thermomagnetic engine exploiting low temperature waste heat. At the temperature difference of 46.5°C between the hot and cold water jets, the thermomagnetic engine produced an average rotational speed of 263 ± 1.5% rpm and a mechanical output power of 76.38 ± 0.5% mW. At the aforementioned rotational speed, the hybrid generator delivered a rectified peak voltage of 15.34 V on an open‐circuit, a short‐circuit current of 20.1 mA, and the largest power output, 12.1 mW, at a 120 Ω load. It was demonstrated that the proposed energy harvester could light dozens of light‐emitting diodes or power a digital thermometer. It is feasible that the proposed thermomagnetic generator can be utilized as an effective power source for various applications.

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“…If the electrodes are positioned only on the backside of the stator, then this structure gives rise to a freestanding mode triboelectric sensor (no electrical contact is needed from the mover) . To achieve high resolution, the metallic electrode gratings must be narrow (sub‐millimeter), usually achieved via photolithography, physical deposition, or ion‐etching methods. These methods are not particularly cost effective and are generally inefficient for fast prototyping.…”

Section: Introductionmentioning

confidence: 99%

Aerosol‐Jet Printed Fine‐Featured Triboelectric Sensors for Motion Sensing

Jing

Choi

Smith

et al. 2018

Adv Materials Technologies

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the relatively simple mechanism involved in converting mechanical energy into electrical signals, [15,16] wide material selection, [17,18] and light weight. [19] Triboelectric generators produce active electric output due to mechanical motion-driven contact electrification and charge induction. These generators can also be used as sensors, where the output signal can be monitored for sensing movement. [20][21][22][23][24] One particular type of triboelectric sensor designed for motion sensing, based on grated electrode structures on triboelectric surfaces, has been found to be potentially reliable, of high resolution, and direction sensitive with a wide selection of feasible materials. [25,26] Typically, these sensors comprise multiple alternating strips of two different triboelectric materials for contact electrification, and grated comb-like electrodes or interdigitated electrodes for charge induction. A commonly reported device structure involves a "mover" that slides over a "stator," with the contacting surface made up of triboelectric material strips, and the grated electrodes positioned on the backside of both the mover and the stator to form a sliding mode triboelectric sensor. [21] The relative sliding motion between the two different materials gives rise to a triboelectric charge that is picked up by the electrodes. If the electrodes are positioned only on the backside of the stator, then this structure gives rise to a freestanding mode triboelectric sensor (no electrical contact is needed from the mover). [27] To achieve high resolution, the metallic electrode gratings must be narrow (submillimeter), usually achieved via photolithography, [28] physical deposition, [26,29] or ion-etching [30] methods. These methods are not particularly cost effective and are generally inefficient for fast prototyping. At the same time, polymers that have good triboelectric properties are difficult to fabricate into the desired fine structures or finely patterned strips by the conventional lithography or physical deposition methods. This has led to the vast majority of the current grated-structure triboelectric sensors being built with metal strips as the active triboelectric material, [18,31] even though these are not particularly well-suited for triboelectric applications. Reports on all polymer-grated triboelectric sensors are thus tellingly rare, even though such devices could potentially offer better resolution and higher signal-to-noise ratios in motion sensing applications.Triboelectric motion sensors, based on the generation of a voltage across two dissimilar materials sliding across each other as a result of the triboelectric effect, have generated interest due to the relative simplicity of the typical grated device structures and materials required. However, these sensors are often limited by poor spatial and/or temporal resolution of motion due to limitations in achieving the required device feature sizes through conventional lithography or printing techniques. Furthermore, the reliance on metallic components t...

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A Sliding-Mode Triboelectric Nanogenerator with Chemical Group Grated Structure by Shadow Mask Reactive Ion Etching

Cited by 96 publications

References 38 publications

Modulation of surface physics and chemistry in triboelectric energy harvesting technologies

Modulation of surface physics and chemistry in triboelectric energy harvesting technologies

Power generation by a thermomagnetic engine by hybrid operation of an electromagnetic generator and a triboelectric nanogenerator

Aerosol‐Jet Printed Fine‐Featured Triboelectric Sensors for Motion Sensing

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