Rational molecular design of polymeric materials toward efficient triboelectric energy harvesting

Lee, Jong Hyeok; Kim, Kyung Hoon; Choi, Moonkang; Jeon, Jisoo; Yoon, Hyeok Jun; Choi, Jinsung; Lee, Young-Seak; Lee, Minbaek; Wie, Jeong Jae

doi:10.1016/j.nanoen.2019.104158

Cited by 38 publications

(42 citation statements)

References 39 publications

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“…In the past two years, due to new technologies and deeper understanding of friction materials, more chemical modification methods have emerged. Based on the high electron affinity and valence of sulfur, Lee et al [64] first reported the triboelectric properties of polymers based on sulfur frameworks. Compared with PTFE, its voltage and current output increased by six and three times, respectively.…”

Section: Evolution and Development Of Chemical Functionalization For mentioning

confidence: 99%

“…Since halogen elements are non-homopolymerizable, they are usually based on carbon for structural purposes and mechanical integrity. [64] Thus, majority of studies on negative triboelectric materials focused on halogenated carbon-based materials, such as PTFE, PVDF, polyvinyl chloride (PVC), and polyvinylidene chloride (PVDC). [86] These materials have relatively weak electron affinity, limiting further increase of the surface charge density.…”

Section: (14 Of 33)mentioning

confidence: 99%

“…In addition to halogens and precious metals (Au and Pt), sulfur has the largest electron affinity in the periodic table with a high valence number. [87] Lee et al [64] first reported the use of fluorinated polymers based on sulfur skeletons as negative triboelectric materials through the modification mechanism shown in Figure 8a. TENG was assembled using different thicknesses of PTFE and different sulfur content in sulfur copolymers and fluorinated sulfur polymers as negative materials paired with Al.…”

Section: (14 Of 33)mentioning

confidence: 99%

“…Halogens are the most electronegative group with high electron affinity to accommodate extra electrons. [64] Introducing halogen functional groups into triboelectric materials is an effective method to improve the output performance of TENG. SAMs uses chemical adsorption of surfactants on a solid surface to achieve an organized molecular assembly.…”

Section: Introduction Of Electron-withdrawing Functional Groupsmentioning

confidence: 99%

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Enhancement of Triboelectric Charge Density by Chemical Functionalization

Liu

et al. 2020

Adv Funct Materials

205

113

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A triboelectric nanogenerator (TENG) can convert energy in the surrounding environment to electricity. Therefore, in recent years, research related to TENGs has significantly increased owing to its simple and low-cost manufacturing process, high portability, and high efficiency. The principle of the TENG lies in the coupling effect of contact electrification and electrostatic induction. Its output performance is directly proportional to the square of the surface charge density, which is related to friction materials. To increase the output power of a TENG and continuously provide electricity for other electronic equipment, many scholars have conducted detailed studies on the triboelectric properties of materials. Particularly, there has been research interest in the chemical functionalization of TENGs due to their unique advantages, such as high triboelectric charge density, durability, stability, and self-cleaning properties. This Progress Report highlights the research progress in chemical modification methods for improving the charge density of TENGs, and classifies their modification methods according to their mechanisms. The effects of chemical reaction, surface chemical treatment, and chemical substance doping on the output performance of TENGs are systematically elaborated. Furthermore, the applications of chemically modified TENG in self-powered sensors and emerging fields, including wearable electronic devices, human-machine interfaces, and implantable electronic devices, are introduced. Lastly, the challenges faced in the future developments of chemical modification methods are discussed, thereby guiding researchers to the use of chemical modification methods for the improvement of charge density for further exploration.

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Section: Evolution and Development Of Chemical Functionalization For mentioning

confidence: 99%

Section: (14 Of 33)mentioning

confidence: 99%

Section: (14 Of 33)mentioning

confidence: 99%

Section: Introduction Of Electron-withdrawing Functional Groupsmentioning

confidence: 99%

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Enhancement of Triboelectric Charge Density by Chemical Functionalization

Liu

et al. 2020

Adv Funct Materials

205

113

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“…[19][20][21][22] These new polymerization methods with S 8 have been driven by fundamental interests in polymer chemistry, but also for use in Li-S batteries, [7,9,[23][24][25] high refractive index polymers, [26] infrared optics, [27][28][29][30] environmental remediation [8,[31][32][33][34] and more recently for creation of liquid metal hybrids [35] and new negative electron affinity triboelectronic materials. [36] To date,aremaining challenge for the use of S 8 in polymer synthesis is to improve the thermomechanical properties and solubility of sulfur-based polymers,w hile also retaining ar easonable sulfur utilization yield into the material. At the heart of this problem is the mutually exclusivity of increasing sulfur content into these polymers versus enhanced thermomechanical properties,asincreasing S-S content favors lower glass transitions (T g )and lower strength materials which often lack high ductility or elasticity.…”

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confidence: 99%

Segmented Polyurethanes and Thermoplastic Elastomers from Elemental Sulfur with Enhanced Thermomechanical Properties and Flame Retardancy

et al. 2021

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The production of elemental sulfur from petroleum refining has created atechnological opportunity to increase the valorization of elemental sulfur by the creation of highperformance sulfur based plastics with improved thermomechanical properties,elasticity and flame retardancy.W ereport on asynthetic polymerization methodology to prepare the first example of sulfur based segmented multi-block polyurethanes (SPUs) and thermoplastic elastomers that incorporate an appreciable amount of sulfur into the final target material. This approach applied both the inverse vulcanization of S 8 with olefinic alcohols and dynamic covalent polymerizations with dienes to prepare sulfur polyols and terpolyols that were used in polymerizations with aromatic diisocyanates and short chain diols.Using these methods,anew class of high molecular weight, soluble blockcopolymer polyurethanes were prepared as confirmed by SizeE xclusion Chromatography,N MR spectroscopy, thermal analysis,a nd microscopic imaging. These sulfur-based polyurethanes were readily solution processed into large area free standing films where both the tensile strength and elasticity of these materials were controlled by variation of the sulfur polyol composition. SPUs with both high tensile strength (13-24 MPa) and ductility (348 %strain at break) were prepared, along with SPU thermoplastic elastomers (578 %s train at break) which are comparable values to classical thermoplastic polyurethanes (TPUs). The incorporation of sulfur into these polyurethanes enhanced flame retardancy in comparison to classical TPUs,w hich points to the opportunity to impart new properties to polymeric materials as ac onsequence of using elemental sulfur.

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Sulfur‐Rich Polymers Coatings

King‐Poole,

Thérien‐Aubin

2024

Adv Funct Materials

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Advancements in the synthesis of sulfur‐rich materials are driving progress across diverse fields owing to the rich and tunable functionalities of those materials. These materials are typically valued for their electrochemical behaviors, high refractive indices, heavy metal affinity, and ability to form dynamic covalent bonding. As a result, their applications span various industries including electronics, catalysis, lithium‐sulfur batteries, water reclamation, and optoelectronics. Moreover, elemental sulfur, a byproduct of the petroleum industry, is produced abundantly, necessitating the exploration of novel valorization routes for polymers made from this feedstock. The unique combination of properties of sulfur‐rich polymers also makes them an ideal platform for the development of high‐performance functional coatings, offering durability and tailored functionalities for protective coatings, thus enhancing materials lifespan and performances in a variety of environmental conditions. The presence of dynamic covalent bonds in many sulfur‐rich polymers enables the creation of self‐healing coatings, while sulfur itself or the comonomers can contribute to antimicrobial, antifouling, and corrosion‐resistant properties. Furthermore, sulfur‐rich polymers have the potential to be used in the design of icephobic and superhydrophobic coatings. This underscores the versatility of sulfur‐rich polymers as a platform for the creation of advanced coatings with superior properties.

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Rational molecular design of polymeric materials toward efficient triboelectric energy harvesting

Cited by 38 publications

References 39 publications

Enhancement of Triboelectric Charge Density by Chemical Functionalization

Enhancement of Triboelectric Charge Density by Chemical Functionalization

Segmented Polyurethanes and Thermoplastic Elastomers from Elemental Sulfur with Enhanced Thermomechanical Properties and Flame Retardancy

Sulfur‐Rich Polymers Coatings

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