Hydrothermal synthesis and characterization of ruthenium oxide nanosheets using polymer additive for supercapacitor applications

Vijayabala, V.; Senthilkumar, N.; Kasi, Nehru; Karvembu, Ramasamy

doi:10.1007/s10854-017-7919-x

Cited by 34 publications

(11 citation statements)

References 37 publications

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“…In Figure c, the peaks at 856.2 and 873.1 eV are assigned to Ni 2p 3/2 and Ni 2p 1/2 , respectively. More precisely, the peaks located at 855.2 and 872.43 eV originated from Ni 2+ and those peaks at 857.89 and 874.18 eV belong to Ni 3+ . The existence of Ni 3+ is due to the surface oxidation of Ni 2+ by the absorbed O 2 , which has been commonly observed in NiS materials .…”

Section: Resultsmentioning

confidence: 80%

“…More precisely, the peaks located at 855.2 and 872.43 eV originated from Ni 2+ and those peaks at 857.89 and 874.18 eV belong to Ni 3+ . [32,33] The existence of Ni 3+ is due to the surface oxidation of Ni 2+ by the absorbed O 2 , which has been commonly observed in NiS materials. [34,35] The deconvoluted peaks at 161.36 and 162.55 eV for S 2p3/2 and 2p1/2 ( Figure 3d) result from the binding energy of S 2− .…”

Section: Electrochemical Measurementsmentioning

confidence: 99%

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Hierarchical NiS@CoS with Controllable Core‐Shell Structure by Two‐Step Strategy for Supercapacitor Electrodes

Miao

Zhang

Zhan

et al. 2019

Adv Materials Inter

116

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Constructing hierarchical core‐shell configuration from well‐known metal sulfides is one way to further tune and utilize unique species. Herein, a novel core‐shell structure is developed based on CoS deposited on NiS nanosheets, which involves hydrothermal and electrodeposition method. The micromorphology of the composite electrode can be optimized by adjusting the cycles of electrodeposition. Taking advantages of the highly conductive, open framework of the core‐shell nanolayer, the 5‐NiS@CoS electrode shows a specific capacitance of 1210 F g−1 at a current density of 1 A g−1 (retaining 82% from 1 to 10 A g−1, while NiS substrate is only 39%). The specific capacitance retention rate is 80.94% at 10 A g−1 after 2000 cycles (NiS substrate is 59.6%). Moreover, NiS@CoS//AC asymmetric supercapacitor device delivers an energy density of 24.1 Wh kg−1 at a power density of 752.15 W kg−1 and remarkable stability (over 80% retention after 5000 cycles). This work may prompt the exploration of the synthesis of inexpensive compounds incorporating highly reactive components for supercapacitors.

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Section: Resultsmentioning

confidence: 80%

Section: Electrochemical Measurementsmentioning

confidence: 99%

Hierarchical NiS@CoS with Controllable Core‐Shell Structure by Two‐Step Strategy for Supercapacitor Electrodes

Miao

Zhang

Zhan

et al. 2019

Adv Materials Inter

116

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“…[101] Again, surfactant stabilized RuO 2 nanosheets using polymer additives were reported to show high capacitive results too. [102] Furthermore, Kim and coworkers used energy-saving, environment benign microwavehydrothermal methods to prepare template-free 3D-flowers of nano ruthenium oxide that exhibited impressive charge storage results. [103] Microwave-assisted reactions are advantageous in the sense that they noticeably improve the crystallization kinetics of nanostructures to large extent.…”

Section: Strategies For Improving Electrochemical Signatures In Ruo 2mentioning

confidence: 99%

“…Sugimoto group also fabricated hydrated‐RuO 2 nanosheets whose pseudocapacitance exceeded to 1300 F g −1 . Again, surfactant stabilized RuO 2 nanosheets using polymer additives were reported to show high capacitive results too . Furthermore, Kim and co‐workers used energy‐saving, environment benign microwave‐hydrothermal methods to prepare template‐free 3D‐flowers of nano ruthenium oxide that exhibited impressive charge storage results .…”

Section: Strategies For Improving Electrochemical Signatures In Ruo2 mentioning

confidence: 99%

Recent Progress in Ruthenium Oxide‐Based Composites for Supercapacitor Applications

Majumdar¹,

Maiyalagan

Jiang³

2019

ChemElectroChem

253

147

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Electrochemical energy storage has emerged as one of the principal topics of present‐day research to deal with the high energy demands of modern society. Accordingly, besides fuel cells and battery technologies, interesting and challenging results have been observed in the recent past, during the materialization of “supercapacitors” or “ultracapacitors”, which have provoked a sharp increase in research inclination to revisit this aspect of renewable and sustainable energy storage. Supercapacitor performances are largely dependent on electrode materials, the nature of the electrolyte used, and the range of voltage windows employed. Carbon‐based electrode materials have tunable properties such as electrical conductivity, extensive surface area, and faster electron transfer kinetics with low fabrication costs. But their specific capacitances are found to be too low for commercialization. Ruthenium dioxide (RuO2), owing to its high theoretical specific capacitance value (1400–2000 F g−1), has been extensively recognized as a favorable material for supercapacitor devices, but high production cost and agglomeration effects stand as high barriers preventing marketable usage. Consequently, RuO2‐based nanocomposites have been widely studied to optimize the material cost, with simultaneous improvement in the electrochemical performances. This Review describes comprehensively the recent progress in terms of the fabrication and design, electrochemical performance, and achievements of RuO2 and its nanocomposites as electrode materials for supercapacitors, which will be beneficial for further research designing high‐performance supercapacitor devices.

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“…It is used in addition to supercapacitors, catalysis, emission performances and fuel cell technology . It is synthesized chemical, thermal, biologic, or vapor phase deposition methods . The dispersed process is very important to obtain higher capacitance between RuO 2 nanoparticles and carbon nanotubes.…”

Section: Introductionmentioning

confidence: 99%

Supercapacitor performances of RuO₂/MWCNT, RuO₂/Fullerene nanocomposites

et al. 2019

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In this study, RuO2/Fullerene and RuO2/MWCNT nanocomposites were synthesized to use as an electroactive materials in symmetric supercapacitor device performances. The materials were examined via Fourier transform infrared spectroscopy‐attenuated total reflectance (FTIR‐ATR), thermo‐gravimetric analysis (TGA‐DTA), scanning electron microscopy‐energy dispersive X‐ray analysis (SEM‐EDX), cyclic voltammetry (CV), galvanostatic charge/discharge (GCD) and electrochemical impedance spectroscopy (EIS). The RuO2/MWCNT and RuO2/Fullerene nanocomposite electrodes show good electrochemical performances. For instance, the highest specific capacitance of RuO2/Fullerene and RuO2/MWCNT electrodes reaches Csp = 3895.11 and 1662.19 F/g at 1 mV/s within the potential range of 0.8 V in 1 M H2SO4 solution. RuO2/MWCNT and RuO2/Fullerene nanocomposites have good cycle stability ~100% specific capacitance at [RuO2]o/[MWCNT]o = 1:1; 2:1 and [RuO2]o/[Fullerene]o = 2:1, respectively. The different equivalent circuit models of LR1Q(C1R2) and LR1(Q1R2)(Q2R3) were used to interpret EIS data.

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Hydrothermal synthesis and characterization of ruthenium oxide nanosheets using polymer additive for supercapacitor applications

Cited by 34 publications

References 37 publications

Hierarchical NiS@CoS with Controllable Core‐Shell Structure by Two‐Step Strategy for Supercapacitor Electrodes

Hierarchical NiS@CoS with Controllable Core‐Shell Structure by Two‐Step Strategy for Supercapacitor Electrodes

Recent Progress in Ruthenium Oxide‐Based Composites for Supercapacitor Applications

Supercapacitor performances of RuO₂/MWCNT, RuO₂/Fullerene nanocomposites

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Hydrothermal synthesis and characterization of ruthenium oxide nanosheets using polymer additive for supercapacitor applications

Cited by 34 publications

References 37 publications

Hierarchical NiS@CoS with Controllable Core‐Shell Structure by Two‐Step Strategy for Supercapacitor Electrodes

Hierarchical NiS@CoS with Controllable Core‐Shell Structure by Two‐Step Strategy for Supercapacitor Electrodes

Recent Progress in Ruthenium Oxide‐Based Composites for Supercapacitor Applications

Supercapacitor performances of RuO2/MWCNT, RuO2/Fullerene nanocomposites

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Product

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Supercapacitor performances of RuO₂/MWCNT, RuO₂/Fullerene nanocomposites