Flexible Supercapacitor Made of Carbon Nanotube Yarn with Internal Pores

Choi, Changsoon; Lee, Jun Young; Choi, An-Seop; Kim, Youn Tae; Lepró, Xavier; Lima, Márcio Dias; Baughman, Ray H.; Kim, Seon Jeong

doi:10.1002/adma.201304736

Cited by 355 publications

(276 citation statements)

References 41 publications

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“…In particular, manganese ions (Mn 2+ ) penetrated into the whole CNT networks via selfdiffusion. The expansion of the CNT networks from 300-400 nm to 1.1-1.3 μm could be due to the formation of the nanostructured MnO 2 nanoparticles within the CNT networks, similar to previous observations 5,29 . A schematic illustration is shown in Fig.…”

Section: Resultssupporting

confidence: 90%

“…Their wearable nature, low weight, and high flexibility make them suitable for powering portable microelectromechanical devices [4][5][6] or other wearable electronic systems [7][8][9][10][11] . Similar to conventional planar-and cylindrical-shaped supercapacitors, FSCs store energy via either the electrical double layer (EDL) principle or the pseudocapacitance mechanism 1 .…”

mentioning

confidence: 99%

“…For the EDL-based FSCs 7,10,[12][13][14][15][16][17] , energy density is governed by the overall capability of the absorbing electrolytes (cations and anions), by having active materials embedded within electrodes. For the pseudo-capacitive FSCs [4][5][6]8,9,[18][19][20][21] , on the other hand, the overall amount of the redox-active materials of the electrodes is key for determining the energy density. Purely EDL-based FSCs with carbon materials arranged as fibers and/or yarns have resulted in high power densities and enhanced cycling stabilities; their energy densities however are often limited to a few mF cm −1 [22][23][24][25] .…”

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confidence: 99%

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Carbon nanotubes and manganese oxide hybrid nanostructures as high performance fiber supercapacitors

et al. 2018

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Manganese oxide (MnO 2 ) has long been investigated as a pseudo-capacitive material for fabricating fiber-shaped supercapacitors but its poor electrical conductivity and its brittleness are clear drawbacks. Here we electrochemically insert nanostructured MnO 2 domains into continuously interconnected carbon nanotube (CNT) networks, thus imparting both electrical conductivity and mechanical durability to MnO 2 . In particular, we synthesize a fiber-shaped coaxial electrode with a nickel fiber as the current collector (Ni/CNT/MnO 2 ); the thickness of the CNT/MnO 2 hybrid nanostructured shell is approximately 150 μm and the electrode displays specific capacitances of 231 mF cm −1 . When assembling symmetric devices featuring Ni/CNT/MnO 2 coaxial electrodes as cathode and anode together with a 1.0 M Na 2 SO 4 aqueous solution as electrolyte, we find energy densities of 10.97 μWh cm −1 . These values indicate that our hybrid systems have clear potential as wearable energy storage and harvesting devices.

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Section: Resultssupporting

confidence: 90%

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confidence: 99%

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Carbon nanotubes and manganese oxide hybrid nanostructures as high performance fiber supercapacitors

et al. 2018

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“…[91,[123][124][125][126] Therefore, the wire-shaped and yarn-shaped supercapacitor endowed with self-healing ability against fracture will pave the way to design and fabricate various self-healing wearable and portable electronic devices. Peng and coworkers reported for the first time a self-healing wire-shaped supercapacitor based on a high-performance selfhealing conducting wire (serving as the electrode), which was fabricated by wrapping aligned CNT around healable polymer fibers (Figure 6a).…”

Section: Wwwadvancedsciencenewscommentioning

confidence: 99%

Self‐Healing Materials for Next‐Generation Energy Harvesting and Storage Devices

Chen

Wang

Yang

et al. 2017

Advanced Energy Materials

228

174

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Because of the great breakthroughs of self‐healing materials in the past decade, endowing devices with self‐healing ability has emerged as a particularly promising route to effectively enhance the device durability and functionality. This article summarizes recent advances in self‐healing materials developed for energy harvesting and storage devices (e.g., nanogenerators, solar cells, supercapacitors, and lithium‐ion batteries) over the past decade. This review first introduces the main self‐healing mechanisms among different materials including insulators, electrical conductors, semiconductors, and ionic conductors. Then, the basic concepts, fabrication techniques, and healing performances of the newly developed self‐healing energy harvesting (nanogenerators and solar cells) and storage (supercapacitors and lithium‐ion batteries) devices are described in detail. Finally, the existing challenges and promising solutions of self‐healing materials and devices are discussed.

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“…Recent research has explored numerous approaches to improve the performance of CNT-based electrodes from the angles of packing density, pores to enhance SSA, incorporation of redox nanostructures via surface functionalization [64][65][66]. The design of hierarchical CNT-based nanocomposites is now a general strategy to pursuit high performance.…”

Section: Current Challenge and Strategies For Cnt-based Electrode Matmentioning

confidence: 99%

Carbon Nanotube-Polymer Composites for Energy Storage Applications

Yuan¹,

Zhu²,

Jia³

2016

Carbon Nanotubes - Current Progress of Their Polymer Composites

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Renewable energy has attracted growing attention due to energy crisis and environmental concern. The renewable power is featured by its intermittent and fluctuating nature, which requires large-scale electrical energy storage devices for dispatch and integration. Among the current energy storage technologies (e.g., pumped hydro, flywheel, compressed air, superconducting magnet, electrochemical systems), electrochemical storage technologies or batteries that reversely convert electrical energy into chemical energy demonstrate extremely great potential in the stationary and transportation applications. Scale determines the device type. Redox flow batteries (RFBs), as one of the large-scale types, are capable of complying with power station. Meanwhile, portable smart electronic devices promote the development of small-scale energy storage systems, such as Li-ion batteries and supercapacitors. With delicate device configuration, materials play critical roles on pursuing advancing performance, in terms of electrode, current collector, and separator. Carbon nanotube (CNT)/polymer composites exhibit promising potentials in the above key entities, which integrate the merits of conductivity, mechanical strength, flexibility, and cost. Therefore, this chapter is devoted to the design and application of carbon nanotube/polymer composites in different kinds of energy storage systems.

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Flexible Supercapacitor Made of Carbon Nanotube Yarn with Internal Pores

Cited by 355 publications

References 41 publications

Carbon nanotubes and manganese oxide hybrid nanostructures as high performance fiber supercapacitors

Carbon nanotubes and manganese oxide hybrid nanostructures as high performance fiber supercapacitors

Self‐Healing Materials for Next‐Generation Energy Harvesting and Storage Devices

Carbon Nanotube-Polymer Composites for Energy Storage Applications

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