Flexible solid-state hybrid supercapacitors for the internet of everything (IoE)

Lee, Jong Hoon; Yang, Guijun; Kim, Choong-Hee; Mahajan, Roop L.; Lee, Sang Soo; Park, Soo‐Jin

doi:10.1039/d1ee03567c

Cited by 102 publications

(65 citation statements)

References 225 publications

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Section: Figurementioning

confidence: 99%

“…A supercapacitor is a promising energy storage device between a traditional physical capacitor and a battery. Based on the differences in energy storage models and structures, supercapacitors are generally divided into three categories: electrochemical double-layer capacitors (EDLCs), redox electrochemical capacitors (pseudocapacitors), and hybrid capacitors ( Figure 1 ) [ 7 ]. Figure 1 summarizes the basic energy storage principles of supercapacitors with the classification as the basic framework and examines the research progress of electrode materials commonly used in recent years.…”

Section: Introductionmentioning

confidence: 99%

“…Supercapacitors have many other advantages, such as being environmentally friendly, having a long service life, being able to operate in wide temperature ranges, and being good at retaining charge even when large currents are applied; they are widely used in consumer electronics, smart meters, and transport [ 7 , 8 , 9 , 10 ]. Supercapacitors have shown that they can perform very well in some applications, but there are still several shortcomings that are relevant in some applications.…”

Section: Introductionmentioning

confidence: 99%

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Recent Advanced Supercapacitor: A Review of Storage Mechanisms, Electrode Materials, Modification, and Perspectives

et al. 2022

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In recent years, the development of energy storage devices has received much attention due to the increasing demand for renewable energy. Supercapacitors (SCs) have attracted considerable attention among various energy storage devices due to their high specific capacity, high power density, long cycle life, economic efficiency, environmental friendliness, high safety, and fast charge/discharge rates. SCs are devices that can store large amounts of electrical energy and release it quickly, making them ideal for use in a wide range of applications. They are often used in conjunction with batteries to provide a power boost when needed and can also be used as a standalone power source. They can be used in various potential applications, such as portable equipment, smart electronic systems, electric vehicles, and grid energy storage systems. There are a variety of materials that have been studied for use as SC electrodes, each with its advantages and limitations. The electrode material must have a high surface area to volume ratio to enable high energy storage densities. Additionally, the electrode material must be highly conductive to enable efficient charge transfer. Over the past several years, several novel materials have been developed which can be used to improve the capacitance of the SCs. This article reviews three types of SCs: electrochemical double-layer capacitors (EDLCs), pseudocapacitors, and hybrid supercapacitors, their respective development, energy storage mechanisms, and the latest research progress in material preparation and modification. In addition, it proposes potentially feasible solutions to the problems encountered during the development of supercapacitors and looks forward to the future development direction of SCs.

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Section: Figurementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Recent Advanced Supercapacitor: A Review of Storage Mechanisms, Electrode Materials, Modification, and Perspectives

et al. 2022

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“…With the advent of the Internet of Everything (IoE) era, beyond the Internet of Things (IoT), has become highly linked to things (physical objects) as well as people, data, and processes. The IoE electronics for the human body, such as flexible sensors and health-monitoring systems, are expected to develop into lightweight, wearable, and human-friendly electronics [ 1 , 2 ]. The IoE community is attempting to address the problem of electromagnetic (EM) waves emitted by electrical circuits or the electromagnetic interference (EMI) that occurs due to the operation of nearby devices.…”

Section: Introductionmentioning

confidence: 99%

Highly Flexible Fabrics/Epoxy Composites with Hybrid Carbon Nanofillers for Absorption-Dominated Electromagnetic Interference Shielding

Lee

Kim

et al. 2022

Nano-Micro Lett.

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Highlights Highly flexible carbon ink-loaded polyester fabric/epoxy composites with outstanding mechanical durability and absorption-dominant EMI-shielding characteristics are fabricated. The fracture toughness is ~ 38.5 MPa m 1/2 and electrical conductivity is maintained after 1000 bending cycles. A superior electromagnetic interference SE /t of ~ 66.8 dB mm –1 was observed in the X-band frequency with over 0.7 absorption coefficient, related to the hierarchical structures composed of macro-scaled voids from the polyester nonwoven fabric skeleton and nano-scaled networks from SWCNTs/rGO.

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“…Recent studies on electrochemical energy storage (EES) devices have heavily focused on the mechanical flexibility of solid-state devices to maintain their high electrochemical performance, which is challenging for the EES systems of portable electronics and electric vehicles. − Supercapacitors, also known as electrochemical capacitors, have been considered smart and promising EES devices for mobile power supplies due to the merits of their rapid charging rate with a time constant of a few seconds, large cycle life (>100,000 cycles), and excellent power density. , …”

Section: Introductionmentioning

confidence: 99%

Paper-Derived Millimeter-Thick Yarn Supercapacitors Enabling High Volumetric Energy Density

Heo

Lee

Kim

et al. 2022

ACS Appl. Mater. Interfaces

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Solid-state supercapacitors have shown extraordinary promise for flexible and wearable electronics. To date, they are still limited by relatively poor energy volumetric performances, which are largely determined by the pore structures and physicochemical properties of electrode materials. Moreover, the poor mechanical properties afforded because of the intrinsic shortcomings of electrode materials need to be resolved. Herein, we designed a flexible and solid-state yarn electrode with high porosity and high affinity toward electrolytes using poly(3,4-ethylenedioxythiophene) (PEDOT) and Korean heritage paper (KHP). To maximize the volumetric capacitive energy storage, PEDOT-loaded conductive KHP sheets (two-dimensional) were transformed into a biscrolled yarn (one-dimensional) via simple twisting. The volumetric capacitance of the biscrolled yarn supercapacitors with 1 mm cell diameter exhibited a volumetric specific capacitance of ∼6576 mF/cm3 at a scan rate of 25 mV/s, which is attributable to the high mass loading of PEDOT as a conductive support and increased packing density. Moreover, multiple optimized yarn supercapacitors can be connected to yield a total length of 1 m, demonstrating enormous potential as a portable and wearable power supply for operating smartwatches.

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Flexible solid-state hybrid supercapacitors for the internet of everything (IoE)

Abstract: In this era of fast-moving technology, new paradigm of Internet of Everything (IoE)—the intelligent connection between people, processes, data, and things—will be accompanied by dramatic changes in modern life that...

Cited by 102 publications

References 225 publications

Recent Advanced Supercapacitor: A Review of Storage Mechanisms, Electrode Materials, Modification, and Perspectives

Recent Advanced Supercapacitor: A Review of Storage Mechanisms, Electrode Materials, Modification, and Perspectives

Highly Flexible Fabrics/Epoxy Composites with Hybrid Carbon Nanofillers for Absorption-Dominated Electromagnetic Interference Shielding

Paper-Derived Millimeter-Thick Yarn Supercapacitors Enabling High Volumetric Energy Density

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