Nanoporous Iron Oxide/Carbon Composites through In-Situ Deposition of Prussian Blue Nanoparticles on Graphene Oxide Nanosheets and Subsequent Thermal Treatment for Supercapacitor Applications

Azhar, Alowasheeir; Yamauchi, Yusuke; Allah, Abeer Enaiet; ALOthman, Zeid A.; Badjah, Ahmad Yacine; Naushad, Mu.; Habila, Mohamed A.; Wabaidur, Saikh Mohammad; Wang, Jie; Zakaria, Mohamed B.

doi:10.3390/nano9050776

Cited by 90 publications

(23 citation statements)

References 30 publications

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“…Furthermore, the capacitive properties of our CzT-CMOP-1 electrode were confirmed by GCD measurements over different current densities of 0.5, 1, 2, 3, 5, 7, 10, 15, and 20 A g -1 (Figure 6b). In agreement with CV data, the CzT-CMOP-1 electrode exhibited triangular chargedischarge curves featuring slight bend, which showed both EDLC and pseudocapacity behaviors generated from Faradic electrochemical redox reactions [69,70]. Figure 7a presented the specific capacitances of our CzT-CMOP-1 electrode, which is estimated from its GCD curves, by applying equation S1.…”

Section: Supercapacitor Applicationsupporting

confidence: 71%

“…Particularly, the CzT-CMOP-1 electrode demonstrated capacitance retention of 46% of its low-current capacitance upon increasing the current density to 20 A g -1 (Figure 7a). The cyclic life of the CzT-CMOP-1 electrode was examined by using 2000 charge-discharge cycles at a constant cur- In agreement with CV data, the CzT-CMOP-1 electrode exhibited triangular chargedischarge curves featuring slight bend, which showed both EDLC and pseudocapacity behaviors generated from Faradic electrochemical redox reactions [69,70]. Figure 7a presented the specific capacitances of our CzT-CMOP-1 electrode, which is estimated from its GCD curves, by applying Equation (S1).…”

Section: Supercapacitor Applicationmentioning

confidence: 54%

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A Tröger’s Base-Derived Covalent Organic Polymer Containing Carbazole Units as a High-Performance Supercapacitor

et al. 2021

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Porous organic polymers have been received considerable attention due to their heteroatom-containing structures and high surface areas, which can offer high electrochemical performance in energy applications. The majority of reported Tröger’s base-functionalized porous organic polymers have been applied as effective candidates for sensing and gas separation/adsorption, while their use as electrode materials in supercapacitors is rare. Here, a novel covalent microporous organic polymer containing carbazole and Tröger’s base CzT-CMOP has been successfully synthesized through the one-pot polycondensation of 9-(4-aminophenyl)-carbazole-3,6-diamine (Cz-3NH2) with dimethoxymethane. The polycondensation reaction’s regioselectivity was studied using spectroscopic analyses and electronic structure calculations that confirmed the polycondensation occurred through the second and seventh positions of the carbazole unit rather than the fourth and fifth positions confirmed by first-principles calculations. Our CzT-CMOP exhibited high thermal stability of approximately 463.5 °C and a relatively high Brunauer–Emmett–Teller surface area of 615 m2 g−1 with a nonlocal density functional theory’s pore size and volume of 0.48 cm3 g−1 and 1.66 nm, respectively. In addition, the synthesized CzT-CMOP displayed redox activity due to the existence of a redox-active carbazole in the polymer skeleton. CzT-CMOP revealed high electrochemical performance when used as active-electrode material in a three-electrode supercapacitor with an aqueous electrolyte of 6 M KOH, and it showed specific capacitance of 240 F g−1 at a current density of 0.5 A g−1 with excellent stability after 2000 cycles of 97% capacitance retention. Accordingly, such porous organic polymer appears to have a variety of uses in energy-related applications.

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Section: Supercapacitor Applicationsupporting

confidence: 71%

Section: Supercapacitor Applicationmentioning

confidence: 54%

A Tröger’s Base-Derived Covalent Organic Polymer Containing Carbazole Units as a High-Performance Supercapacitor

et al. 2021

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“…The PB/GO hybrid was obtained by the in-situ deposition of PB nanoparticles on the GO sheets (Azhar A. et al, 2019b). First, the GO sheets were synthesized by the exfoliation of graphite based on the modified Hummer's method (Tanaka S. et al, 2017).…”

Section: Resultsmentioning

confidence: 99%

“…Generally, the calcination of PB in air produces iron oxide (IO) as a result of the removal of the cyano-group and the oxidation of the iron species. Our group previously synthesized PB and completely transformed it into nanoporous iron oxide hybrids (Azhar A. et al, 2019b), such as β-Fe 2 O 3 (Machala L. et al, 2013), and mixed crystalline phases of iron oxide (α, γ and β-phases) (Roy X. et al, 2011). On the contrary, when pure PB was heated under inert atmosphere, the formation of metallic iron and iron carbide (IC) (Fe 7 C 3 , Fe 2 C, and Fe 3 C) was observed (Zakaria M. B. et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Fabrication and Characterization of Prussian Blue-Derived Iron Carbide-Iron Oxide Hybrid on Reduced Graphene Oxide Nanosheets

Azhar

Earnshaw

Zakaria

et al. 2021

KONA

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This work demonstrates the fabrication of a nanoporous iron carbide-iron oxide/reduced graphene oxide (IC-IO/ rGO) hybrid via a controlled one-step thermal treatment of Prussian blue (PB)/GO hybrid at 450 °C under N 2 flow. The PB/GO hybrid is initially prepared through the in-situ deposition of PB nanoparticles on the GO sheets through electrostatic interactions. The morphological analysis of the hybrid reveals the uniform coverage of the rGO sheets by IC-IO nanoparticles and the even distribution of carbon (C), oxygen (O), and iron (Fe) on the rGO nanosheets. As a result of the hybrid composition and controlled morphology, the surface area of the obtained IC-IO/rGO hybrid (~40 m 2 /g) is significantly enhanced compared to those of the calcined GO sheets and PB nanoparticles (without GO).

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“…The GO/IO hybrid showed a higher specific capacitance of 91 F g −1 at a scan rate of 20 mV s −1 compared to pure GO (81 F g −1 ) and pure IO (47 F g −1 ). Similarly, Azhar et al [ 130 ] prepared Fe 2 O 3 /carbon composites by a facile thermal annealing of PB/GO composite precursor. The resulting iron oxide/carbon composite exhibited superior electrochemical performance as an electrode material for SCs than pure GO and Fe 2 O 3 electrodes in terms of specific capacitance, rate capability, and capacitance retention.…”

Section: Pb/pbas and Their Derivatives For Scsmentioning

confidence: 99%

Toward the Design of High‐performance Supercapacitors by Prussian Blue, its Analogues and their Derivatives

Lin

Zhang

Xiong

et al. 2020

Energy & Environ Materials

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Supercapacitors (SCs) with high power output have attracted increasing attention as efficient and environmentally friendly energy storage devices. Prussian blue and its analogues (PB/PBAs) are simple coordination polymers with tunable chemical compositions and open framework. Prussian blue can act as electrode materials in its pristine form and has also been utilized to derive various metallic nanostructures for electrochemical applications due to their simple fabrication process, non‐toxic characteristics, and low price. Here, we firstly describe the charge storage mechanisms of SCs briefly followed by an introduction of the fabrication methods of PB/PBAs and their derivatives. Then, a comprehensive review on recent studies of the use of PB/PBAs and their derivatives as the electrode materials for SCs are given with a focus on strategies to improve their electrochemical performances. Finally, we discuss critical challenges in this research area and propose some general ideas for future research.

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Nanoporous Iron Oxide/Carbon Composites through In-Situ Deposition of Prussian Blue Nanoparticles on Graphene Oxide Nanosheets and Subsequent Thermal Treatment for Supercapacitor Applications

Cited by 90 publications

References 30 publications

A Tröger’s Base-Derived Covalent Organic Polymer Containing Carbazole Units as a High-Performance Supercapacitor

A Tröger’s Base-Derived Covalent Organic Polymer Containing Carbazole Units as a High-Performance Supercapacitor

Fabrication and Characterization of Prussian Blue-Derived Iron Carbide-Iron Oxide Hybrid on Reduced Graphene Oxide Nanosheets

Toward the Design of High‐performance Supercapacitors by Prussian Blue, its Analogues and their Derivatives

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