One‐Step Fabrication of Transparent and Flexible Nanotopographical‐Triboelectric Nanogenerators via Thermal Nanoimprinting of Thermoplastic Fluoropolymers

Choi, Dongwhi; Yoo, Donghyeon; Kim, Dong Sung

doi:10.1002/adma.201503802

Cited by 75 publications

(30 citation statements)

References 50 publications

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“…[ 13 ] Furthermore, TENG with superhydrophobic interfaces has a strong self‐cleaning ability, just like lotus leaf surfaces, which is a very important requirement for water‐based TENG in outdoor environments. [ 14 ] As one of the most abundant resources on earth, cellulose is a renewable, biocompatible, and biodegradable natural polymer. [ 15 ] The efficient use of cellulose conforms to the requirements for new environmental protection materials; more importantly, paper assembled from cellulose has high strength and excellent elasticity.…”

Section: Introductionmentioning

confidence: 99%

Superhydrophobic Cellulose Paper‐Based Triboelectric Nanogenerator for Water Drop Energy Harvesting

Nie

Guo

et al. 2020

Adv Materials Technologies

135

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The high‐efficiency conversion of water drop mechanical energy into electrical energy has always been an urgent issue in the development and utilization of raindrop energy. In this work, a novel drum‐like triboelectric nanogenerator (D‐TENG) with robust self‐cleaning superhydrophobic features is developed to harvest water drop energy. An elastic superhydrophobic cellulose paper is created by spray‐coating nanofumed silica dispersed in a thermoplastic elastomer solution, followed by treatment with triethoxy‐1H,1H,2H,2H‐tridecafluoro‐n‐octylsilane. When raindrops hit the D‐TENG surface, the superhydrophobic cellulose paper will vibrate and periodic contact and separation with polytetrafluoroethylene will occur to generate electricity. The results demonstrate that when a 6 mm water drop falls from a height of 2.5 m and hits the D‐TENG, the generated voltage output can reach a peak of 21.6 V and charge transfer of 10 nC. The output power of the D‐TENG can reach 16 µW per droplet, which is more than 13.3 times that generated from the previous TENGs based on the electrostatic induction of water droplets. These results indicate that the superhydrophobic cellulose paper‐based D‐TENG is potentially a strong candidate for harvesting energy from raindrops, thereby making it a promising sustainable energy source for next‐generation electronics.

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Section: Introductionmentioning

confidence: 99%

Superhydrophobic Cellulose Paper‐Based Triboelectric Nanogenerator for Water Drop Energy Harvesting

Nie

Guo

et al. 2020

Adv Materials Technologies

135

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“…Photolithography for fabrication of micro structured molds and templates is another technique which is an intensive, costly, and size limited process for surface modification . Anodized Aluminum (AAO) has been utilized as a mold for fabrication of nanorods by embossing polymers onto it . A highly controlled procedure must be carried out to reach an ordered AAO template to be effective for surface modification .…”

Section: Introductionmentioning

confidence: 99%

High Performance Triboelectric Nanogenerator by Hot Embossing on Self‐Assembled Micro‐Particles

2018

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Triboelectric nanogenerator (TENG) is a novel technology for energy harvesting and active sensing which shows a great potential toward extracting the ambient kinetic energy. The surface morphology of triboelectric layers is one of the most important elements for enhancing the output of TENG devices. Current surface modification methods mostly require complicated, long term, size limited, and costly processes. This paper presents a cost effective, facile, repeatable, and fast method for large scale surface modification of triboelectric layers which significantly enhance the performance of TENG devices. This method simply utilizes the hot-embossing of polymers on self-assembled micro-particles to create semi-ordered micro-sized structures on the surfaces. The modified surfaces increase the output performance of the TENG such as open circuit voltage and short circuit current for more than four times. As the presence of water degrades the output of TENG, this technique is very beneficial to remarkably improve the hydrophobicity of the contact layers. The proposed method can be applied to a variety of polymers with an area scalable fabrication toward the use of TENG in real world industrial applications.

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“…The eminent concept of the triboelectric nanogenerator (TENG), which utilizes contact electrification of two different material surfaces accompanied by electrical induction, has been proposed [ 2 ]. Since its first proposal in 2012, TENG has been actively studied, hence, it is considered to be a promising energy harvesting technology to operate portable electronic devices without spatio-temporal limitations on the basis of its advantages, such as material selection diversity, high efficiency and high shape adaptability [ 3 , 4 , 5 , 6 , 7 , 8 ]. The most actively conducted research topic in the field of the TENG is the enhancement of its electrical output performance, which is similar to those of other energy-harvesting technologies [ 9 ].…”

Section: Introductionmentioning

confidence: 99%

“…The most actively conducted research topic in the field of the TENG is the enhancement of its electrical output performance, which is similar to those of other energy-harvesting technologies [ 9 ]. Given that the fundamental operating mechanism of the TENG is based on the contact and separation between two surfaces, the simplest and most widely used strategy to enhance the electrical output performance is the introduction of micro- and nanoscale structures onto the surfaces where friction occurs [ 3 , 5 , 10 , 11 , 12 ]. The formation of the surface structures significantly increases local contact pressure resulting in further increases in the contact area between two contact surfaces, thereby generating a high amount of electrical charge on the contact surface [ 13 ].…”

Section: Introductionmentioning

confidence: 99%

Development of the Triboelectric Nanogenerator Using a Metal-to-Metal Imprinting Process for Improved Electrical Output

Choi

et al. 2018

Micromachines

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Triboelectric nanogenerators (TENG), which utilize contact electrification of two different material surfaces accompanied by electrical induction has been proposed and is considered as a promising energy harvester. Researchers have attempted to form desired structures on TENG surfaces and successfully demonstrated the advantageous effect of surface topography on its electrical output performance. In this study, we first propose the structured Al (SA)-assisted TENG (SA-TENG), where one of the contact layers of the TENG is composed of a structured metal surface formed by a metal-to-metal (M2M) imprinting process. The fabricated SA-TENG generates more than 200 V of open-circuit voltage and 60 µA of short-circuit current through a simple finger tapping motion. Given that the utilization of the M2M imprinting process allows for the rapid, versatile and easily accessible structuring of various metal surfaces, which can be directly used as a contact layer of the TENG to substantially enhance its electrical output performance, the present study may considerably broaden the applicability of the TENG in terms of its fabrication standpoint.

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One‐Step Fabrication of Transparent and Flexible Nanotopographical‐Triboelectric Nanogenerators via Thermal Nanoimprinting of Thermoplastic Fluoropolymers

Cited by 75 publications

References 50 publications

Superhydrophobic Cellulose Paper‐Based Triboelectric Nanogenerator for Water Drop Energy Harvesting

Superhydrophobic Cellulose Paper‐Based Triboelectric Nanogenerator for Water Drop Energy Harvesting

High Performance Triboelectric Nanogenerator by Hot Embossing on Self‐Assembled Micro‐Particles

Development of the Triboelectric Nanogenerator Using a Metal-to-Metal Imprinting Process for Improved Electrical Output

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