Elastomeric and Dynamic MnO<sub>2</sub>/CNT Core–Shell Structure Coiled Yarn Supercapacitor

Choi, Changsoon; Sim, Hyeon Jun; Spinks, Geoffrey M.; Lepró, Xavier; Baughman, Ray H.; Kim, Seon Jeong

doi:10.1002/aenm.201502119

Cited by 218 publications

(172 citation statements)

References 34 publications

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“…In addition to providing high-density energy storage and fast energy release, these fibres must also be sufficiently robust to be fabricated into textiles by such industrial processes as weaving, knitting and sewing. Important recent advances have increased the energy and power densities of fibre-based supercapacitors123456789101112131415161718192021222324252627282930, some of which also provide high flexibility and stretchability. Yet, the ever advancing applications needs far eclipse presently realized power and energy densities of yarns and fibres and new approaches are needed to bridge this technology gap.…”

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confidence: 99%

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Improvement of system capacitance via weavable superelastic biscrolled yarn supercapacitors

et al. 2016

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Yarn-based supercapacitors having improved performance are needed for existing and emerging wearable applications. Here, we report weavable carbon nanotube yarn supercapacitors having high performance because of high loadings of rapidly accessible charge storage particles (above 90 wt% MnO2). The yarn electrodes are made by a biscrolling process that traps host MnO2 nanoparticles within the galleries of helically scrolled carbon nanotube sheets, which provide strength and electrical conductivity. Despite the high loading of brittle metal oxide particles, the biscrolled solid-state yarn supercapacitors are flexible and can be made elastically stretchable (up to 30% strain) by over-twisting to produce yarn coiling. The maximum areal capacitance of the yarn electrodes were up to 100 times higher than for previously reported fibres or yarn supercapacitors. Similarly, the energy density of complete, solid-state supercapacitors made from biscrolled yarn electrodes with gel electrolyte coating were significantly higher than for previously reported fibre or yarn supercapacitors.

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confidence: 99%

“…In this direction, recent improved fibre-based supercapacitors have used thin MnO 2 coatings that are applied to highly conductive and, in some cases, highly stretchable base fibres234567891011121314151617. Ultimately, however, this core–shell structure limits the allowable active material loading before performance is compromised.…”

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Improvement of system capacitance via weavable superelastic biscrolled yarn supercapacitors

et al. 2016

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“…The carbon-based hybrid with metal oxides (MnO 2 /CNT [30], NiO/graphene, Co 3 O 4 /graphene, etc. ), metals hydroxide (Ni(OH) 2 /graphene, Co(OH) 2 /graphene, etc.)…”

Section: Carbon-based Materials For Pseudocapacitorsmentioning

confidence: 99%

Carbon-Based Electrode Materials for Supercapacitor: Progress, Challenges and Prospective Solutions

Jian¹,

Liu²,

Gao³

et al. 2016

JEE

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Carbon-based materials are typical and commercially active electrode for supercapacitors due to their advantages such as low cost, good stability and easy availability. In the light of energy storage, supercapacitors mechanism is classified into EDLCs (electrochemical double layer capacitors) and pseudocapacitors. Multidimensional carbon nanomaterials (active carbon, carbon nanotube, graphene, etc.), carbon-based composite and corresponding electrolyte are the critical and important factor in the eyes of researcher. In this minireview, we will discuss the storage mechanism and summarize recent developed novel carbon and carbon-based materials in supercapacitors. The techniques to design the novel nanostructure and high performance electrodematerials that facilitate charge transfer to achieve high energy and power densities will also be discussed.

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“…As a key member of EES, ECs have attracted tremendous attention due to their advantages of high power density, exceptional long cycling life, and reliability [11][12][13][14]. The electrode materials, which is a key component of ECs [15], generally fall into three categories: (1) porous carbons with high specific surface area (e.g., metal-organic frameworks-derived nanoporous carbon [16,17], carbidederived carbon [18], carbon nanotubes [19], graphene [20]), (2) intrinsically conductive polymers (ICPs, e.g., polyaniline [21][22][23], polypyrrole [24,25], poly(DNTD) [26,27]), and (3) transition metal oxides/hydroxides (e.g., RuO 2 [28], MnO 2 [29], MoS 2 [30], Ni(OH) 2 [31], Co(OH) 2 [32]). Generally, porous carbons serve as electrode materials of electric doublelayer capacitors (EDLCs) to store energy via an electrostatic charge accumulation [33], while the ICPs and transition metal oxides/hydroxides serve as electrode materials of pseudocapacitors to store energy via redox reactions [34].…”

Section: Electronic Supplementary Materialsmentioning

confidence: 99%

Significantly enhanced energy density of magnetite/polypyrrole nanocomposite capacitors at high rates by low magnetic fields

Wei

Guo

et al. 2017

Adv Compos Hybrid Mater

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One great challenge existing in electrochemical capacitors (ECs) is to achieve high energy densities at high rates. Currently, most research efforts are focused on development of new electrode materials or modification of the microstructure of traditional electrode materials. Herein, we propose a new strategy for significant enhancement of the energy density of ECs at high rates, in which an external magnetic field is exerted. Results indicate that exertion of a magnetic field can increase the energy density of nanocomposite capacitors significantly. In particular, the energy densities of the magnetite/ polypyrrole nanocomposite capacitors containing different content magnetite nanoparticles achieve an increase of more than 10 times at a high current density of 10 A/g, compared to the counterparts without a magnetic field. The possible mechanism is that the magnetic field induces electrolyte ion movement enhancement and charge transfer resistance reduction, which remarkably cause the increase of capacitance and energy density. This work provides an innovative strategy to significantly enhance the rate capabilities of current ECs by a simple physical process rather than chemical process.

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Elastomeric and Dynamic MnO₂/CNT Core–Shell Structure Coiled Yarn Supercapacitor

Abstract: . (2016). Elastomeric and dynamic MnO 2 /CNT core-shell structure coiled yarn supercapacitor. Advanced Energy Materials, 6 (5), 1502119-1-1502119-8.

Cited by 218 publications

References 34 publications

Improvement of system capacitance via weavable superelastic biscrolled yarn supercapacitors

Improvement of system capacitance via weavable superelastic biscrolled yarn supercapacitors

Carbon-Based Electrode Materials for Supercapacitor: Progress, Challenges and Prospective Solutions

Significantly enhanced energy density of magnetite/polypyrrole nanocomposite capacitors at high rates by low magnetic fields

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Elastomeric and Dynamic MnO2/CNT Core–Shell Structure Coiled Yarn Supercapacitor

Abstract: . (2016). Elastomeric and dynamic MnO 2 /CNT core-shell structure coiled yarn supercapacitor. Advanced Energy Materials, 6 (5), 1502119-1-1502119-8.

Cited by 218 publications

References 34 publications

Improvement of system capacitance via weavable superelastic biscrolled yarn supercapacitors

Improvement of system capacitance via weavable superelastic biscrolled yarn supercapacitors

Carbon-Based Electrode Materials for Supercapacitor: Progress, Challenges and Prospective Solutions

Significantly enhanced energy density of magnetite/polypyrrole nanocomposite capacitors at high rates by low magnetic fields

Contact Info

Product

Resources

About

Elastomeric and Dynamic MnO₂/CNT Core–Shell Structure Coiled Yarn Supercapacitor