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RuoffRodney Scott

Ruoff, Rodney S.
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Necklace‐like Nitrogen‐Doped Tubular Carbon 3D Frameworks for Electrochemical Energy Storage

Author(s)
Yuksel, RecepBuyukcakir, OnurLee, Sun HwaJiang, YiPanda, Pritam KumarSingh, DeobratHansen, SandraAdelung, RainerMishra, Yogendra KumarAhuja, RajeevRuoff, Rodney S.
Issued Date
2020-03
DOI
10.1002/adfm.201909725
URI
https://scholarworks.unist.ac.kr/handle/201301/49531
Citation
ADVANCED FUNCTIONAL MATERIALS, v.30, pp.1909725
Abstract
The design and synthesis of a necklace-like nitrogen-doped tubular carbon (NTC) are presented by growing microporous polyhedral ZIF-8 particles and a uniform layer of ZIF-8 on sacrificial ZnO tetrapods (ZTPs). Oxygen vacancies together with defect regions on the surface of the ZTPs result in the formation of ZIF-8 polyhedra in conjunction with a very thin shell. This necklace-like NTC structure has a high N content, very large surface area, ultrahigh microporosity, and quite high electrical conductivity. NTC-based symmetrical supercapacitor and zinc-ion capacitor (ZIC) devices are fabricated and their electrochemical performance is measured. The NTC supercapacitor shows an ultrahigh rate capability (up to 2000 mV s(-1)) and promising cycle life, retaining 91.5% of its initial performance after 50 000 galvanostatic charge-discharge cycles. An aqueous ZIC, constructed using the NTC, has a specific capacitance of 341.2 F g(-1) at a current density of 0.1 A g(-1) and an energy density of 189.6 Wh kg(-1) with a 2.0-V voltage window, respectively. The outstanding performance is attributed to the NTC high N-doping content, a continuous "polyhedral 3D hollow" architecture and the highly porous microtubular arms exhibiting very high surface area.
Publisher
John Wiley & Sons Ltd.
ISSN
1616-301X
Keyword (Author)
energy storagemetal-organic frameworkssupercapacitorstetrapodszinc-ion capacitors
Keyword
ZEOLITIC IMIDAZOLATE FRAMEWORKMETAL-ORGANIC FRAMEWORKSHIGH-PERFORMANCEHOLLOW CARBONFILMSUPERCAPACITORSELECTRODESBATTERIESNANORODSZIF-8

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