Synergistic nanostructuring of CoNi-carbide/reduced graphene oxide derived from porous coordination polymers for high-performance hybrid supercapacitors

Aboelazm, Eslam A. A.; Khe, Cheng Seong; Shukur, M. F.; Chong, Kwok Feng; Saheed, Mohamed Shuaib Mohamed; Zakaria, Mohamed B.

doi:10.1016/j.est.2023.108580

Cited by 7 publications

(8 citation statements)

References 77 publications

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“…as confirmed by PDF #01-087-0532. 30,32 As well, the transformation of CoNi-CP to CoNi-Se, as depicted in Figure 1a, highlighted by the rise of a distinct peak pattern characteristic of cubic (Ni,Co)Se 2 (Figure 1b), aligning with JCPDS #29-1417, observed in both CoNi-Se and CoNi-Se/ rGO. 33 Observably, XRD peak corresponding to (012) vanishes in CoNi-Se/rGO, potentially indicative of a preferred growth direction of the material on the rGO surface.…”

Section: Resultssupporting

confidence: 62%

“…An additional peak at 433.7 eV represents C�O. 30,45 In the Se 3d spectrum (Figure2f), the peaks observed at 54.6 and 55.4 eV are confidently attributed to Se 3d 5/2 and Se 3d 3/2 in selenides. Moreover, the detection of a distinct peak at 59.2 eV signifies the presence of Se−O bonding structures.…”

Section: Resultsmentioning

confidence: 88%

“…Notably, CoNi-Se/rGO leans more toward battery-like behavior due to its discussed hybrid architecture, emphasizing its potential for efficient energy storage applications. An in-depth analysis of electrochemical mechanism kinetics involves exploring charge storage that encompasses both capacitive and diffusive processes, as revealed by eqs S2–S4 . Within this framework, the total charges stored in the SC ( Q T ) can be partitioned into diffusive charges ( Q D ) and capacitive charges ( Q C ).…”

Section: Resultsmentioning

confidence: 99%

“…The synthesis of graphene oxide (GO) was conducted using a modified Hummers method, as outlined, a procedure that has been previously detailed in our earlier publication. 30 The preoxidation process commenced with 400 mg of graphite flakes, 200 mg of NaNO 3 , 600 mg of K 2 S 2 O 8 , and 600 mg of P 2 O 5 . This mixture was stirred in 6 mL of H 2 SO 4 at 80 °C for 6 h and then cooled to room temperature.…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

“…28,29 Thus, herein, the development of novel electrode material, the hollow sheets CoNi-Se/rGO composite, synthesized for the first time following our previously reported method. 30 The design strategically leverages the synergistic advantages derived from the combination of rGO, functioning as a 3D interconnected microcurrent collector and porous CoNi-Se sheets. Comprehensive investigations into the structural, morphological, and electrochemical properties of the CoNi-Se/rGO composite are conducted and expounded.…”

Section: ■ Introductionmentioning

confidence: 99%

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Interconnected CoNi-Se Hollow Flakes through Reduced Graphene Oxide Sheets as a Cathode Material for Hybrid Supercapacitors

Aboelazm,

Khe,

Chong

et al. 2024

ACS Appl. Mater. Interfaces

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Achieving a high energy density and long-cycle stability in energy storage devices demands competent electrochemical performance, often contingent on the innovative structural design of materials under investigation. This study explores the potential of transition metal selenide (TMSe), known for its remarkable activity, electronic conductivity, and stability in energy storage and conversion applications. The innovation lies in constructing hollow structures of binary metal selenide (CoNi-Se) at the surface of reduced graphene oxide (rGO) arranged in a three-dimensional (3D) morphology (CoNi-Se/rGO). The 3D interconnected rGO architecture works as a microcurrent collector, while porous CoNi-Se sheets originate the active redox centers. Electrochemical analysis of CoNi-Se/rGO based-electrode reveals a distinct faradic behavior, thereby resulting in a specific capacitance of 2957 F g −1 (1478.5 C g −1 ), surpassing the bare CoNi-Se with a value of 2149 F g −1 (1074.5 C g −1 ) at a current density of 1 A g −1 . Both materials exhibit exceptional high-rate capabilities, retaining 83% of capacitance at 10 A g −1 compared to 1 A g −1 . In a two-electrode coin cell system, the device achieves a high energy density of 73 Wh kg −1 at a power density of 1500 W kg −1 , stating an impressive 90.4% capacitance retention even after enduring 20,000 cycles. This study underscores the CoNi-Se/rGO composite's promise as a superior electrode material for high-performance energy storage applications.

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Section: Resultssupporting

confidence: 62%

Section: Resultsmentioning

confidence: 88%

Section: Resultsmentioning

confidence: 99%

Section: ■ Experimental Sectionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

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Interconnected CoNi-Se Hollow Flakes through Reduced Graphene Oxide Sheets as a Cathode Material for Hybrid Supercapacitors

Aboelazm,

Khe,

Chong

et al. 2024

ACS Appl. Mater. Interfaces

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Ternary nanocomposite of RAFT‐polymerized DMAEMA‐functionalized graphene oxide, manganese dioxide and polyaniline as active electrode material for supercapacitor

Moussaei,

Haddadi‐Asl,

Ahmadi

2024

Polymer International

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Graphene and its derivatives are promising energy storage devices due to their high specific surface area, chemical and thermal durability, and high charge transfer power. Still, their stacking and aggregate behavior can limit their practical capacity. To address this issue, reversible addition−fragmentation chain‐transfer (RAFT) polymerization as controlled radical polymerization (CRP) was applied to functionalize the surface of GO with poly (N, N‐dimethyl aminoethyl methacrylate), PDMAEMA, via the ‘grafting‐from’ method. This strategy enhances the distance between graphene sheets by occupying physical volume while improving effective charge transfer through tertiary amine groups participating in the doping process. X‐ray diffraction (XRD) was used to determine interlayer spacing after polymer grafting, which increased from 0.28 nm to 1.71 nm after polymer grafting. The hybridization of materials with diverse properties was used to enhance charge transfer capability for supercapacitor applications. PDMAEMA‐functionalized graphene oxide (GOPD), nano manganese dioxide (MnO2), and polyaniline (PANI) were combined to create a successful nanocomposite as electrode active material. The morphological structure and chemical composition of the synthesized nanocomposites were analyzed, and their electrochemical performance was evaluated using cyclic voltammetry (CV), galvanostatic charge–discharge (GCD), and electrochemical impedance spectroscopy (EIS). The nanocomposite exhibited a maximum specific capacitance, Energy density, and Power density of 364.72 F/g (at a scan rate of 50 mV/s), energy, 239.08 Wh/kg and 678.34 W/kg, respectively. The final nanocomposite's energy storage capacity significantly increased compared to individual components due to hybridization's synergistic impact, reducing charge transfer resistance.This article is protected by copyright. All rights reserved.

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Hofmann‐Type Cyanide Bridged Coordination Polymers for Advanced Functional Nanomaterials

Hegazy,

Hassan,

2023

Small

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Since the discovery of Hofmann clathrates of inorganic cyanide bridged coordination polymers (Hofmann‐type CN‐CPs), extensive research is done to understand their behavior during spin transitions caused by guest molecules or external stimuli. Lately, research on their nanoscale architectures for sensors and switching devices is of interest. Their potential is reported for producing advanced functional inorganic materials in two‐dimensional (2D) morphology using a scalable solid‐state thermal treatment method. For instance, but not restricted to, alloys, carbides, chalcogenides, oxides, etc. Simultaneously, their in situ crystallization at graphene oxide (GO) nanosheet surfaces, followed by a subsequent self‐assembly to build layered lamellar structures, is reported providing hybrid materials with a variety of uses. Hence, an overview of the most recent developments is presented here in the synthesis of nanoscale structures, including thin films and powders, using Hofmann‐type CN‐CPs. Also thoroughly demonstrated are the most recent synthetic ideas with the modest control over the size and shape of nanoscale particles. Additionally, in order to create new functional hybrid materials for electrical and energy applications, their thermal decomposition in various environments and hybridization with GO and other guest molecules is examined. This review article also conveyed their spin transition, astounding innovative versatile adhesives, and structure features.

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Synergistic nanostructuring of CoNi-carbide/reduced graphene oxide derived from porous coordination polymers for high-performance hybrid supercapacitors

Cited by 7 publications

References 77 publications

Interconnected CoNi-Se Hollow Flakes through Reduced Graphene Oxide Sheets as a Cathode Material for Hybrid Supercapacitors

Interconnected CoNi-Se Hollow Flakes through Reduced Graphene Oxide Sheets as a Cathode Material for Hybrid Supercapacitors

Ternary nanocomposite of RAFT‐polymerized DMAEMA‐functionalized graphene oxide, manganese dioxide and polyaniline as active electrode material for supercapacitor

Hofmann‐Type Cyanide Bridged Coordination Polymers for Advanced Functional Nanomaterials

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