Enhanced Charge Storage Mechanism And Long-Term Cycling Stability In Diamondized Titania Nanocomposite Supercapacitors Operating In Aqueous Electrolytes - Publikacja - MOST Wiedzy

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Enhanced Charge Storage Mechanism And Long-Term Cycling Stability In Diamondized Titania Nanocomposite Supercapacitors Operating In Aqueous Electrolytes

Abstrakt

The long cycle life stability jointly with high energy density are limiting broader feasible applications of supercapacitors. The novel diamondized titania nanocomposite supercapacitors deliver high power and energy densities along with high capacitance retention rates. Supercapacitor electrodes were fabricated utilizing a combination of Ti anodization followed by chemical vapor deposition resulting in simultaneous growth of complex BDD/TiC interface. The first-principles simulations along with extended molecular investigations conducted by BF-TEM and HR-SEM revealed that capacitive phenomena are delivered by nanoporous, multi-faceted, and substoichiometric TiC, forming clusters at the lateral surfaces of titania nanotubes. Next, TiC mechanical stability and effective charge transfer electrode-electrolyte are efficiently provided by highly conductive although discontinuous BDD overlayer. The assembled two-electrode supercapacitor devices exhibited capacitance 15 mF cm−2, which were stable at 0.1 V s−1 scan rate in various neutral aqueous electrolytes. The composite TiO2NT-BDD supercapacitors showed outstanding long-term cycling stability with capacitance retention of 93% after 100,000 chronopotentiometry cycles verified by post-aging cyclic voltammetry tests. In parallel, the energy and power density calculated at a current density of 3 A g-1 achieved levels as high as 14.74 Wh kg-1 and 24.68 kW kg-1, revealing the superior performance of the assembled devices compared to recently reported supercapacitors.

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Kategoria:
Publikacja w czasopiśmie
Typ:
artykuły w czasopismach
Opublikowano w:
Journal of Physical Chemistry C nr 124, strony 15698 - 15712,
ISSN: 1932-7447
Język:
angielski
Rok wydania:
2020
Opis bibliograficzny:
Bogdanowicz R., Dettlaff A., Skiba F., Trzciński K., Szkoda M., Sobaszek M., Ficek M., Dec B., Macewicz Ł., Geng D., Ignaczak A., Ryl J.: Enhanced Charge Storage Mechanism And Long-Term Cycling Stability In Diamondized Titania Nanocomposite Supercapacitors Operating In Aqueous Electrolytes// Journal of Physical Chemistry C -Vol. 124,iss. 29 (2020), s.15698-15712
DOI:
Cyfrowy identyfikator dokumentu elektronicznego (otwiera się w nowej karcie) 10.1021/acs.jpcc.0c02792
Weryfikacja:
Politechnika Gdańska

wyświetlono 40 razy

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