Joule heating-induced faradaic electrode-decorated graphene fibers for flexible fiber-shaped hybrid supercapacitor with high volumetric energy density

Lee, Hak Bong; Veerasubramani, Ganesh Kumar; Lee, Kyong Sub; Lee, Hyeonhoo; Han, Tae Hee

doi:10.1016/j.carbon.2022.07.047

Cited by 13 publications

(1 citation statement)

References 69 publications

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“…5f highlights the volumetric energy density and power density of the rGO/SrGO ber supercapacitor electrode. When compared to previously reported graphene-based ber supercapacitors used in the gel-type electrolytes [30][31][32][33][34], both the energy density and power density of the rGO/SrGO composite electrode were found to be superior, thereby con rming its exceptional performance as an electrode of solid-state supercapacitor (Table 1 in supporting information).…”

Section: Electrochemical Performance Of the Rgo/srgo Ber Supercapacitormentioning

confidence: 74%

Hierarchical Pore Engineering by Graphene Nanoscroll for All-Solid-State Fiber Supercapacitors

Oh,

Lee,

Kim

et al. 2024

Preprint

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In the burgeoning field of flexible energy storage, creating resilient and efficient supercapacitors suitable for integration into wearable technology remains a formidable challenge. This paper introduces the hybrid fiber supercapacitors based on the reduced graphene oxide (rGO) and the scrolled reduced graphene oxide (SrGO). The unique 1-D morphology of SrGO addresses the limited dispersibility of graphene components, benefiting the wet-spinning process and performance of supercapacitor application. The SrGO provides hierarchical pore structures to rGO/SrGO hybrid fiber composed of the open pores of SrGO and the interconnected pores between rGO and SrGO. This structural enhancement translates into exceptional electrochemical attributes, including increased specific capacitance and electoral conductivity, outperforming standard graphene-based fibers. Furthermore, we demonstrate the mechanical robustness of these hybrid fibers, maintaining their electrochemical integrity under dynamic bending conditions, a breakthrough feature for wearable applications. The successful interlacing of these supercapacitors into functional textiles, offering versatility in energy storage parameters, represents a significant advancement in smart textiles.

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Section: Electrochemical Performance Of the Rgo/srgo Ber Supercapacitormentioning

confidence: 74%

Hierarchical Pore Engineering by Graphene Nanoscroll for All-Solid-State Fiber Supercapacitors

Oh,

Lee,

Kim

et al. 2024

Preprint

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Surface Charge Regulation of Graphene by Fluorine and Chlorine Co‐Doping for Constructing Ultra‐Stable and Large Energy Density Micro‐Supercapacitors

Liu,

Hou,

Wang

et al. 2024

Advanced Science

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Settling the structure stacking of graphene (G) nanosheets to maintain the high dispersity has been an intense issue to facilitate their practical application in the microelectronics‐related devices. Herein, the co‐doping of the highest electronegative fluorine (F) and large atomic radius chlorine (Cl) into G via a one‐step electrochemical exfoliation protocol is engineered to actualize the ultralong cycling stability for flexible micro‐supercapacitors (MSCs). Density functional theoretical calculations unveiled that the F into G can form the “ionic” C─F bond to increase the repulsive force between nanosheets, and the introduction of Cl can enlarge the layer spacing of G as well as increase active sites by accumulating the charge on pore defects. The co‐doping of F and Cl generates the strong synergy to achieve high reversible capacitance and sturdy structure stability for G. The as‐constructed aqueous gel‐based MSC exhibited the superb cycling stability for 500,000 cycles with no capacitance loss and structure stacking. Furthermore, the ionic liquid gel‐based MSC demonstrated a high energy density of 113.9 mW h cm−3 under high voltage of up to 3.5 V. The current work enlightens deep insights into the design and scalable preparation of high‐performance co‐doped G electrode candidate in the field of flexible microelectronics.

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Fiber‐Based Flexible Ionic Diode with High Robustness and Rectifying Performance: Toward Electronic Textile Circuits

Woo,

Kim,

Kim

et al. 2023

Adv Elect Materials

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In response to the growing demand for wearable devices designed for seamless integration with 3D bio‐surfaces, fiber‐based devices have gained prominence in textile‐based wearable electronics due to their flexibility and unique structure. In particular, though diodes with rectifying properties are crucial for a range of electronic systems, there has been scant reporting on diodes with a fiber structure. This study introduces a fiber‐based flexible ionic diode that exhibits a rectification ratio of 2773 and an output current of 28.2 mA at 3 V. The diode is composed of a double helical Zn‐based fiber anode, a Ti‐based fiber cathode on Au nanoparticle‐based flexible fiber electrodes, and a LiCl hydrogel electrolyte. By modulating the double helical design and the ionic conductivity of the hydrogel, the electrical performance of the diode to achieve varying rectification ratios and output currents can be tailored. Owing to the remarkable flexibility and stability of the fiber electrodes, the fiber‐based ionic diode consistently upholds its rectifying capabilities, even under washing procedures and significant bending deformation. Furthermore, this diode seamlessly integrates into various electronic circuits, including half‐wave rectifiers, capacitor–diode filters, and logic gate systems.

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Joule heating-induced faradaic electrode-decorated graphene fibers for flexible fiber-shaped hybrid supercapacitor with high volumetric energy density

Cited by 13 publications

References 69 publications

Hierarchical Pore Engineering by Graphene Nanoscroll for All-Solid-State Fiber Supercapacitors

Hierarchical Pore Engineering by Graphene Nanoscroll for All-Solid-State Fiber Supercapacitors

Surface Charge Regulation of Graphene by Fluorine and Chlorine Co‐Doping for Constructing Ultra‐Stable and Large Energy Density Micro‐Supercapacitors

Fiber‐Based Flexible Ionic Diode with High Robustness and Rectifying Performance: Toward Electronic Textile Circuits

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