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  Sandwich-like NiCo layered double hydroxide/reduced graphene oxide nanocomposite cathodes for high energy density asymmetric supercapacitors

Le, K., Wang, Z., Wang, F., Wang, Q., Shao, Q., Murugadoss, V., et al. (2019). Sandwich-like NiCo layered double hydroxide/reduced graphene oxide nanocomposite cathodes for high energy density asymmetric supercapacitors. Dalton Transactions, 48(16), 5193-5202. doi:10.1039/c9dt00615j.

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 Urheber:
Le, Kai, Autor
Wang, Zhou, Autor
Wang, Fenglong, Autor
Wang, Qi, Autor
Shao, Qian, Autor
Murugadoss, Vignesh, Autor
Wu, Shide, Autor
Liu, Wei, Autor
Liu, Jiurong, Autor
Gao, Qiang1, Autor           
Guo, Zhanhu, Autor
Affiliations:
1Research Department Schlögl, Max Planck Institute for Chemical Energy Conversion, Max Planck Society, ou_3023874              

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 Zusammenfassung: Nanocomposites with a well-defined sandwich-like nanostructure were prepared via in situ growing NiCo-layered double hydroxide nanosheets with tunable Ni/Co ratios on reduced graphene oxide (rGO). Electrochemical impedance spectra and N-2 adsorption/desorption isotherms confirmed that these sandwich nanostructures effectively promoted charge transport and enlarged the specific surface area. The nanocomposites with Ni:Co = 2:1 exhibited a maximum specific capacitance of 2130 F g(-1) at 2 A g(-1), excellent rate capability (72.7% retention at 15 A g(-1)), and cycling stability. Asymmetric supercapacitors were assembled with these nanocomposite cathodes and rGO as a negative electrode (anode), and demonstrated an energy density of 34.5 W h kg(-1) at a power density of 772 W kg(-1), while maintaining a capacity retention of 86.7% after 10000 cycles at 5 A g(-1). The robust electrochemical properties indicate the composites as promising electrodes for electrochemical energy storage devices.

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Sprache(n): eng - English
 Datum: 2019
 Publikationsstatus: Erschienen
 Seiten: -
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: Expertenbegutachtung
 Identifikatoren: ISI: 000465328200009
DOI: 10.1039/c9dt00615j
 Art des Abschluß: -

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Titel: Dalton Transactions
  Kurztitel : Dalton Trans.
Genre der Quelle: Zeitschrift
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Affiliations:
Ort, Verlag, Ausgabe: Cambridge, UK : Royal Society of Chemistry
Seiten: - Band / Heft: 48 (16) Artikelnummer: - Start- / Endseite: 5193 - 5202 Identifikator: ISSN: 1477-9226
CoNE: https://pure.mpg.de/cone/journals/resource/954925269323