Supercapacitive properties of carbazole-containing cobalt(ii) phthalocyanines/reduced graphene oxide composites

Hacer Yasemin Yenilmez, Özlem Budak, Nazlı Farajzadeh Öztürk, Atıf Koca, Almila Boz, Belkıs Ustamehmetoğlu, Zehra Altuntaş Bayır*

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Araştırma sonucu: ???type-name???Makalebilirkişi

1 Atıf (Scopus)

Özet

This study aims to compare the effect of substituents (position and number) and reduced graphene oxide on the supercapacitive properties of cobalt(ii) phthalocyanines. For this purpose, three new tetra- and octa-substituted cobalt(ii) phthalocyanines bearing 9H-carbazol-2-yloxy groups on peripheral or non-peripheral positions (1-3) were synthesized. The characterization of the resultant cobalt(ii) phthalocyanines was carried out by applying several spectroscopic approaches. The newly synthesized macromolecules were used for the functionalization of reduced graphene oxide (rGO). The obtained nanocomposites (rGO-(1-3)) were utilized for the modification of Ni foam (NiF) electrodes through a facile one-step electrodeposition strategy performed for electrochemical supercapacitor applications. Simultaneous polymerization of the cobalt phthalocyanines and electrochemically reduction of graphene oxide led to the formation of a fabricating layer on the surface of the NiF electrode. The resulting electropolymerized films were characterized by Raman, Fourier-transform infrared (FT-IR), and Field emission scanning electron microscope (FESEM) spectroscopic techniques as well as electrochemical methods. The prepared electrodes possessed superior electrochemical activities owing to the synergistic effect of the cobalt(ii) phthalocyanines and rGO. All the modified electrodes displayed high supercapacitaive properties and the highest activity was obtained for the NiF/rGO2-1 electrode. The NiF/rGO2-1 electrode exhibited higher specific capacitance (655.2 F g−1 at 0.5 A g−1) than NiF/1 (338.0 F g−1). Additionally, a specific capacitance of 85.2% was obtained for NiF/rGO2-1 electrode after 3000 charge-discharge cycles. As a result, all the prepared metallophthalocyanines-reduced graphene oxide can be considered alternative agents to develop high performance-next-generation energy storage devices.

Orijinal dilİngilizce
Sayfa (başlangıç-bitiş)1766-1778
Sayfa sayısı13
DergiDalton Transactions
Hacim53
Basın numarası4
DOI'lar
Yayın durumuYayınlandı - 14 Ara 2023

Bibliyografik not

Publisher Copyright:
© 2024 The Royal Society of Chemistry.

Finansman

This work was supported by The Scientific and Technological Research Council of Türkiye (TÜBİTAK) [Grant Number: 122Z036] and the Scientific Research Projects Commission (BAPKO) of Marmara University [Grant Number: FDK-2023–10936]. Atıf Koca also thanks the Turkish Academy of Sciences (TÜBA) for the financial support.

FinansörlerFinansör numarası
Scientific Research Projects Commission
TÜBA
Türkiye Bilimsel ve Teknolojik Araştırma Kurumu122Z036
Türkiye Bilimler Akademisi
Marmara ÜniversitesiFDK-2023–10936

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