Robust nanogenerators based on graft copolymers via control of dielectrics for remarkable output power enhancement

Lee, Jae Won; Cho, Hye Jin; Chun, Jinsung; Kim, Kyeong Nam; Kim, Seongsu; Ahn, Chang Won; Kim, Ill Won; Kim, Ju‐Young; Kim, Sang Woo; Yang, Changduk; Baik, Jeong Min

doi:10.1126/sciadv.1602902

Cited by 211 publications

(109 citation statements)

References 41 publications

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“…A similar phenomenon has also been observed for layer‐by‐layer deposition of strong polyelectrolytes (e.g., poly(diallyldimethylammonium chloride) or poly(sodium 4‐styrenesulfonate)) . In general, many different types of coating (e.g., polymer grafting, dip coating, and many others) and methods for treating the surface (e.g., plasma or other chemical functionalization, such as oxidation or sulphonation) have been used for changing the amount and polarity of charge generated on surfaces …”

Section: Strategies For Controlling Surface Chargementioning

confidence: 54%

Controlling Surface Charge Generated by Contact Electrification: Strategies and Applications

et al. 2018

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Contact electrification is the phenomenon in which charge is generated on the surfaces of materials after they come into contact. The surface charge generated has traditionally been known to cause a vast range of undesirable consequences in our lives and in industry; on the other hand, it can also give rise to many types of useful applications. In addition, there has been a lot of interest in recent years for fabricating devices and materials based on regulating a desired amount of surface charge. It is thus important to understand the general strategies for increasing, decreasing, or controlling the surface charge generated by contact electrification. Herein, the fundamental mechanisms for influencing the amount of charge generated, the methods used for implementing these mechanisms, and some of the recent interesting applications that require regulating the amount of surface charge generated by contact electrification, are briefly summarized.

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Section: Strategies For Controlling Surface Chargementioning

confidence: 54%

Controlling Surface Charge Generated by Contact Electrification: Strategies and Applications

et al. 2018

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“…In the process of mechanosensing, the dispersed tiny mechanical energy is converged on nanoscale near‐tip stress field at the antifracture slit tip and then converted into electric energy by mechanosensory neuron. There is an urgent need for improving the mechanoelectrical energy conversion efficiency of ind‐MTMs which have been widely used for driving low‐power portable and wearable electronic device without any external power supplies, harvesting clean mechanical energy from the ambient environment and improving the sensitivity of mechanical sensors . The proposed theory in this work indicates that the ultrasensitive mechanoreceptor of scorpion represents a completely new paradigm in maximizing the mechanoelectrial energy conversion efficiency of ind‐MTMs because the physical essence of mechanosensing is highly efficient conversion of mechanical energy contained in the mechanical signals into electrical energy which nervous system can be used.…”

Section: Discussionmentioning

confidence: 99%

Highly Efficient Mechanoelectrical Energy Conversion Based on the Near‐Tip Stress Field of an Antifracture Slit Observed in Scorpions

Wang

Zhang

Song

et al. 2019

Adv Funct Materials

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In the field of engineering, a crack, inducing enormous mechanical energy concentration at a tip, is considered a typical kind of defect. However, it is found that, to maximize the sensitivity of slit-based mechanoreceptors, the near-tip stress field of "risky" crack-shaped slits is ingeniously used by scorpions to precisely detect the cyclic loads acting on walking legs without the crack nucleation from the flaw-like tip. As a sophisticated biological mechanoelectrical transducing microsystem, the mechanoreceptor can effectively collect mechanical energy contained in the mechanical signal through antifracture slit allays and then convert the mechanical energy into electrical energy through mechanosensory neuron. The highly efficient mechanoelectrical energy conversion mechanism is theoretically analyzed and experimentally verified in a bioinspired artificial mechanoreceptor. The results demonstrate the potential of basic "design" principles, underlying the slit-dependent mechanoreceptor, for maximizing the electromechanical conversion efficiency of the industrial mechanoelectrical transducing microsystem such as nanogenerators, ultrasensitive mechanical sensors, self-powered portable, and wearable electronics.

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“…They synthesized a copolymer to increase the dielectric constant of contact materials. As shown in Figure 8(c), PVDF was successfully incorporated with poly(tertbutyl acrylate) (PtBA) through the atom-transfer radical polymerization [119]. The PtBA composed of the functional groups containing π-bonding and polar characteristics enhanced the dipole moment of contact materials, resulting in the improved performance of TEGs.…”

Section: Dielectric Property Engineeringmentioning

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

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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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Robust nanogenerators based on graft copolymers via control of dielectrics for remarkable output power enhancement

Abstract: Robust nanogenerator based on poly(tert-butyl acrylate)–grafted PVDF copolymers via dielectric constant control is demonstrated.

Cited by 211 publications

References 41 publications

Controlling Surface Charge Generated by Contact Electrification: Strategies and Applications

Controlling Surface Charge Generated by Contact Electrification: Strategies and Applications

Highly Efficient Mechanoelectrical Energy Conversion Based on the Near‐Tip Stress Field of an Antifracture Slit Observed in Scorpions

Modulation of surface physics and chemistry in triboelectric energy harvesting technologies

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