High-performance asymmetric supercapacitor fabricated with a novel MoS2/Fe2O3/Graphene composite electrode

Palanisamy, R.; Diwakar, K.; Venkatesan, Shanmuganathan; Mani, Saravanan; Kuppusamy, M. R.; Marimuthu, Senthilkumaran; Karuppanan, Aravinth; Govindaraju, Radhika; Sivakumar, M.; Abdollahifar, Mozaffar; Anbalagan, Aswin kumar; Ramasamy, P.

doi:10.1016/j.colcom.2021.100573

Cited by 28 publications

(11 citation statements)

References 24 publications

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“…6c), which is higher than those of most reported ASCs and materials. 10,19,20,[43][44][45][46][47][48] Meanwhile, the ASC delivers a volumetric energy density of 114.3 W h L −1 at a volumetric power density of 517.9 W L −1 (Fig. 6d), superior to many advanced ACSs and materials, including HRGO/Ni(PA) 2 -1//HRGO (23.7 W h L −1 at 632 W L −1 ), 49 GO (9.1 W h L −1 at 2777.3 W L −1 ), 50 CLFW@(Co, Ni)-(CoS, NiS) (66 W h L −1 at 50 W L −1 ), 51 CNF@Ni (58 W h L −1 at 39 W L −1 ), 52 and GNS/Fe (14.6 W h L −1 at 381 W L −1 ).…”

Section: Resultsmentioning

confidence: 99%

“…[14][15][16][17][18] Among various pseudocapacitive materials, Fe 2 O 3 is a potential negative electrode material owing to its high capacity, wide voltage window, non-toxicity, eco-friendliness, cost-effectiveness, abundant reserves, and facile synthesis. 19,20 Ni(OH) 2 , considered a versatile positive electrode material, possesses a theoretical specific capacitance as high as 2082 F g −1 . 21 However, difficulties are encountered in their practical applications due to their low conductivity, unsatisfactory filmforming ability, and the fast decay of electrochemical properties.…”

Section: Introductionmentioning

confidence: 99%

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Porous graphene/CNT@metal (hydr)oxide composite films achieving fast ion and electron kinetics for asymmetric supercapacitors with ultra-high volumetric performance

Qiu,

Hou,

Jiang

et al. 2024

Inorg. Chem. Front.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Porous graphene/CNT@metal (hydr)oxide composite films achieving fast ion and electron kinetics for asymmetric supercapacitors with ultra-high volumetric performance

Qiu,

Hou,

Jiang

et al. 2024

Inorg. Chem. Front.

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“…It is to be noted that the oxidation peaks shifted slightly to higher potential upon increasing the loading of e-NCO. The areal capacity is calculated from CV using the following equation Q s = ∫ I ( V ) .25em normald V A ν where Q s , ∫ I ( V ) d V , A, and ν represent the specific capacity (C cm –2 ), the absolute area under the CV curve, the area of active material coated on CC (1 cm 2 here), and the scan rate (V s –1 ), respectively.…”

Section: Resultsmentioning

confidence: 99%

Solution Processing of Spinel Nickel Cobaltite: Exfoliation Mechanism, Dispersion Stability, and Applications

Sahoo,

Mohanta

et al. 2024

Inorg. Chem.

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The exfoliation of nonlayered materials to mono- or few-layers is of growing interest to realize their full potential for various applications. Nickel cobaltite (NiCo2O4), which has a spinel crystal structure, is one such nonlayered material with unique properties and has been utilized in a wide range of applications. Herein, NiCo2O4 is synthesized from NiCo2- Layered double hydroxides using a topochemical conversion technique. Subsequently, bulk NiCo2O4 is exfoliated into mono- or few-layer nickel cobaltene nanosheets using liquid-phase exfoliation in various low-boiling point solvents. An analytical centrifuge technique is also utilized to understand the solute–solvent interactions by determining their dispersion stability using parameters such as the instability index and sedimentation velocity. Among the studied solvents, water/isopropyl alcohol cosolvent is found to have better dispersion stability. In addition, density functional theory calculations are carried out to understand the exfoliation mechanism. It is found that the surface termination arising from the Co–O bond needs the least energy for exfoliation. Furthermore, the obtained nickel cobaltene nanosheets are utilized as an active material for supercapacitors without any conductive additives or binders. A solid-state symmetric supercapacitor delivers a specific capacitance of 10.2 mF cm–2 with robust stability, retaining ∼98% capacitance after 4000 cycles.

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“…The CHI60 electrochemical workstation was used to investigate the cyclic voltammetry (CV) and galvanostatic charge/discharge (GCD) of the electrode. The capacitance from the CV graph was calculated using the formula given below [23]:…”

Section: Electrode Preparation For Energy Storage Applicationsmentioning

confidence: 99%

Synergistic Germanium-Decorated h-BN/MoS2 Heterostructure Nanosheets: An Advanced Electrocatalyst for Energy Storage Applications

Saravanan

Rajkumar

Sethuraman³

et al. 2023

Energies

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Increasing concerns about the vulnerability of the world’s energy supply and the necessity to implement sustainable technologies have prompted researchers to develop high-performance electrocatalysts that are affordable and efficient for converting and storing renewable energy. This article reports a facile approach to fabricating two-dimensional (2D) Ge-decorated h-BN/MoS2 heterostructure nanosheets by self-assembly for multiple electrochemical applications such as supercapacitor and hydrogen evolution reactions. The organization of the physical and chemical links between the germanium modulations on the heterostructure of boron nitride/molybdenum sulphide (Ge/h-BN/MoS2) were facilitated to generate more active sites. Furthermore, the asymmetric supercapacitor of Ge-decorated h-BN/MoS2 amplified the capacitance to 558.53 F g−1 at 1 A g−1 current density and 159.19 F g−1 at 10 A g−1, in addition to a retention rate of 85.69% after 2000 cycles. Moreover, the Ge-decorated h-BN/MoS2 catalyst realized a low over-potential value, with an RHE of 0.57 (HER) at 5 mA/cm2, a Tafel value of ∼204 mV/dec, and long-term electrolysis stability of 10 h. This work may open the door for further investigations on metal-decorated heterostructures, which have a significant potential for both supercapacitor and water-splitting applications.

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High-performance asymmetric supercapacitor fabricated with a novel MoS2/Fe2O3/Graphene composite electrode

Cited by 28 publications

References 24 publications

Porous graphene/CNT@metal (hydr)oxide composite films achieving fast ion and electron kinetics for asymmetric supercapacitors with ultra-high volumetric performance

Porous graphene/CNT@metal (hydr)oxide composite films achieving fast ion and electron kinetics for asymmetric supercapacitors with ultra-high volumetric performance

Solution Processing of Spinel Nickel Cobaltite: Exfoliation Mechanism, Dispersion Stability, and Applications

Synergistic Germanium-Decorated h-BN/MoS2 Heterostructure Nanosheets: An Advanced Electrocatalyst for Energy Storage Applications

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