Ply-hierarchical coiled yarns for two extreme applications: Strain sensors and elastic supercapacitor electrodes

Son, Wonkyeong; Lee, Jae Myeong; Choi, Jin Hyeong; Suh, Dongseok; Choi, Changsoon

doi:10.1016/j.snb.2022.132775

Cited by 5 publications

(3 citation statements)

References 41 publications

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“…The exceptional deformability of our fiber systems may be attributed to the following three aspects: First, the as-used rubber mandrel-core fiber serves as an effective elastic matrix providing a sufficiently low strength (4 MPa) and modulus (0.3 MPa) for wearable and implantable applications as well as a dielectric medium for capacitive strain sensing. Second, as previously demonstrated, strain mismatch-induced microbuckled CNT structures effectively absorb applied tensile or torsional stresses via buckles unfolding, [8,42,43] suggesting that our fibers can exhibit a stable electrical conductance. Third, a large pretwist application for mandrel-core fiber (maximum −2520 rad per meter just before the coil formation) induced torsion-mismatch with non-twisted CNT ribbons, followed by self-formation of CNT helical patterns on the surface of the fibers when the twist was released.…”

Section: Introductionsupporting

confidence: 61%

“…Fiber-based electronics (fibertronics), adopting 1D architecture with small diameters from tens to hundreds of micrometers, are one of the most promising free-form factors for developing wearable electronics owing to their differentiated softness, splendid shape-adaptivity, and human-friendly interfaces. [1][2][3][4] These distinguishing advantages compared to the conventional bulky or planar counterparts have triggered immense research interest in the development of diverse fibrous devices that can offer functions such as electrical interconnection, [5][6][7] energy storage, [8][9][10] deformation sensing, [11][12][13] and actuation. [14][15][16] For sustainable and reliable utilization of fiber-based electronic devices in wearable application scenarios, the first and the most important aspect is to prepare electromechanically stable fibers that can effectively accommodate various user-induced arbitrary deformations without noticeable degradation of electrical properties.…”

Section: Introductionmentioning

confidence: 99%

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Double‐Helical Carbon Nanotube‐Wrapped Elastomeric Mandrel for Electrical Shortage‐Free, One‐Body Multifunctional Fiber Systems

Son,

Lee,

Choi

et al. 2024

Adv Funct Materials

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Soft and elastic fiber‐based electronic devices exhibiting high electromechanical stability are highly desirable for sustainable and continuous utilization in various applications. However, effectively assembling the cathode and anode in a single body without unwanted interconnections and realizing an intimate contact interface between the electrode and substrate remain challenging. Here, an electrical shortage‐free one‐body fiber system with double‐helix buckle electrodes created by torsion‐ and strain‐mismatch between carbon nanotube (CNT) ribbons and a rubber substrate is reported. The as‐used CNT ribbons serve as the strain‐insensitive electrode, while the rubber mandrel‐core fiber acts as the key matrix in the following three aspects: as an elastic substrate that ensures reversible structural changes during mechanical deformations; as a dielectric layer for capacitive strain sensing; and as an electrothermal expansion element for tensile contraction. Moreover, because of the mismatch‐induced torque‐balance structure, the helically wrapped CNT buckle electrodes can effectively absorb the applied stresses without noticeable delamination and electrical conductance loss. Consequently, the double‐helix buckle fiber system can reliably provide multiple functions, viz. detection of various deformations (e.g., stretching, twisting, and pressing), electrochemical energy storage with excellent strain tolerance, and reversible electrothermal tensile actuation.

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Section: Introductionsupporting

confidence: 61%

Section: Introductionmentioning

confidence: 99%

Double‐Helical Carbon Nanotube‐Wrapped Elastomeric Mandrel for Electrical Shortage‐Free, One‐Body Multifunctional Fiber Systems

Son,

Lee,

Choi

et al. 2024

Adv Funct Materials

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“…Moreover, hierarchical coiled yarn was fabricated by plying nine strands of buckled CNT yarn electrodes. As a result, linear and areal capacitances of 1.32 mF/cm and 3.74 mF/cm 2 , respectively, and a mechanical stretchability of 800% were demonstrated [ 62 ]. Table 3 lists the electrochemical performances of supercapacitors with various stretchable yarn structures.…”

Section: Research Trends Concerning Yarn Supercapacitorsmentioning

confidence: 99%

A Review of Yarn-Based One-Dimensional Supercapacitors

Han,

Kim,

Lee

et al. 2023

Nanomaterials

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Energy storage in a one-dimensional format is increasingly vital for the functionality of wearable technologies and is garnering attention from various sectors, such as smart apparel, the Internet of Things, e-vehicles, and robotics. Yarn-based supercapacitors are a particularly compelling solution for wearable energy reserves owing to their high power densities and adaptability to the human form. Furthermore, these supercapacitors can be seamlessly integrated into textile fabrics for practical utility across various types of clothing. The present review highlights the most recent innovations and research directions related to yarn-based supercapacitors. Initially, we explore different types of electrodes and active materials, ranging from carbon-based nanomaterials to metal oxides and conductive polymers, that are being used to optimize electrochemical capacitance. Subsequently, we survey different methodologies for loading these active materials onto yarn electrodes and summarize innovations in stretchable yarn designs, such as coiling and buckling. Finally, we outline a few pressing research challenges and future research directions in this field.

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Energy harvesting and storage using highly durable Biomass-Based artificial muscle fibers via shape memory effect

Seo,

Kim,

Hong

et al. 2025

Chemical Engineering Journal

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Ply-hierarchical coiled yarns for two extreme applications: Strain sensors and elastic supercapacitor electrodes

Cited by 5 publications

References 41 publications

Double‐Helical Carbon Nanotube‐Wrapped Elastomeric Mandrel for Electrical Shortage‐Free, One‐Body Multifunctional Fiber Systems

Double‐Helical Carbon Nanotube‐Wrapped Elastomeric Mandrel for Electrical Shortage‐Free, One‐Body Multifunctional Fiber Systems

A Review of Yarn-Based One-Dimensional Supercapacitors

Energy harvesting and storage using highly durable Biomass-Based artificial muscle fibers via shape memory effect

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