Mixed solvent exfoliated transition metal oxides nanosheets based flexible solid state supercapacitor devices endowed with high energy density

Dutta, Shibsankar; Pal, Shreyasi; De, Sourya Joyee

doi:10.1039/c9nj03233a

Cited by 47 publications

(21 citation statements)

References 97 publications

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“…The surface area of Mn, Zn co‐doped NiCo 2 O 4 is three times higher than the pure NiCo 2 O 4 . The high surface area and mesoporous nature of the Mn, Zn co‐doped NiCo 2 O 4 nanocomposite enhances the electrochemical activity by shortening the ion pathways, enhancing the contact area, enriches the redox active sites, improving the electrolyte penetration through the mesopores, and facilitates the charge transfer kinetics compared with pure NiCo 2 O 4 [27] …”

Section: Resultsmentioning

confidence: 99%

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A Facile One‐Pot Hydrothermal Synthesis of Zn, Mn Co‐Doped NiCo₂O₄ as an Efficient Electrode for Supercapacitor Applications

et al. 2021

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A high electrochemical performance and cost effective solid state NiCo 2 O 4 material was synthesized by hydrothermal method. The performance of the supercapacitor material was investigated by incorporating the zinc and manganese in the crystal structure of NiCo 2 O 4 . The structure and morphology were confirmed by X-ray diffraction (XRD) pattern and Field Emission Scanning Electron Microscope (FE-SEM), and High Resolution Transmission Electron Microscope (HR-TEM). The optical absorption spectra of the pure and co-doped NiCo 2 O 4 were investigated by UV-Vis analysis and the bandgap energy was found to be 4.38 and 2.98 eV respectively. Photoluminescence spectra (PL) reveal the blue and green emission peaks were found at 364, 376 and 488 nm respectively. The pore size and surface area of Mn, Zn co-doped NiCo 2 O 4 was evaluated by Brunauer -Emmett -Teller analysis (BET). The cyclic voltammetry (CV) reveals the faradaic reaction of the pure and co-doped NiCo 2 O 4 with excellent reversibility at higher scan rates. The maximum specific capacitance for pure and co-doped NiCo 2 O 4 nanoparticles (NPs) was achieved as 158.6 and 513.17 Fg À 1 respectively. Further, the electrochemical impedance spectroscopy (EIS) and galvanostatic charge discharge (GCD) were performed to identify the resistance and rate capability of the electrode materials. The cyclic stability of pure and Zn, Mn codoped NiCo 2 O 4 was found to be 90.8 % and 95.07 % respectively for 3000 Cycles. The Zn, Mn co-doped NiCo 2 O 4 can be used as an excellent electrode for supercapacitor applications.

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Section: Resultsmentioning

confidence: 99%

“…[26] Furthermore, the Mn, Zn ical activity by shortening the ion pathways, enhancing the contact area, enriches the redox active sites, improving the electrolyte penetration through the mesopores, and facilitates the charge transfer kinetics compared with pure NiCo 2 O 4 . [27]…”

Section: Brunauer -Emmett -Teller Analysismentioning

confidence: 99%

A Facile One‐Pot Hydrothermal Synthesis of Zn, Mn Co‐Doped NiCo₂O₄ as an Efficient Electrode for Supercapacitor Applications

et al. 2021

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“…Z. et al, 2015;Peng et al, 2017;Zavabeti et al, 2017;Tao et al, 2019). It is reported that MoO 3 , MnO 2 , and RuO 2 nanosheets, etc., can be made at a large scale by ultrasonic exfoliation in ethanol/water and can be applied to solid-state symmetrical supercapacitors (Dutta et al, 2019). A liquid-phase exfoliation method with the aid of lithium (Li) intercalation and deintercalation was developed for the preparation of quasi-layered VO 2 ultrathin nanosheet (Liu et al, 2012).…”

Section: Two-dimensional Transition Metal Oxides/hydroxidesmentioning

confidence: 99%

Two-Dimensional Transition Metal Oxide and Hydroxide-Based Hierarchical Architectures for Advanced Supercapacitor Materials

et al. 2020

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The supercapacitor has been widely seen as one of the most promising emerging energy storage devices, by which electricity is converted from chemical energy and stored. Two-dimensional (2D) metal oxides/hydroxides (TMOs/TMHs) are revolutionizing the design of high-performance supercapacitors because of their high theoretical specific capacitance, abundance of electrochemically active sites, and feasibility for assembly in hierarchical structures by integrating with graphitic carbon, conductive polymers, and so on. The hierarchical structures achieved can not only overcome the limitations of using a single material but also bring new breakthroughs in performance. In this article, the research progress on 2D TMOs/TMHs and their use in hierarchical structures as supercapacitor materials are reviewed, including the evolution of supercapacitor materials, the configurations of hierarchical structures, the electrical properties regulated, and the existence of advantages and drawbacks. Finally, a perspective covering directions and challenges related to the development of supercapacitor materials is provided.

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“…Besides that the NiCo2O4 nanosheet produces a small cell voltage of 1.59 V to drive a current density of 10 mA cm -2 compared to for Co3O4 catalyst [21][22][23] . Therefore, it is crucial to engineer different types of metal-ligand coordination to create abundant active sites for the electrocatalysis based on the lattice structure [24][25][26][27][28]…”

Section: Graphical Abstract Introductionmentioning

confidence: 99%

Extraction of non-noble metal columbite-tantalite as a highly efficient electrocatalyst for water splitting

Bacirhonde¹,

Dzade²,

Chalony³

et al. 2021

Preprint

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The development of robust and inexpensive electrocatalysts that are capable of catalyzing the overall water splitting reaction is highly essential for large scale production of hydrogen. Herein, we report the successful liquid-liquid extraction and hydrothermal synthesis of a highly stable columbite-tantalite electrocatalysts (Fe0.79Mn0.21Nb0.16Ta0.84O6) with remarkable HER and OER performance in alkaline media. The extracted Fe0.79Mn0.21Nb0.16Ta0.84O6 electrocatalyst shows a low overpotential of 190.2 and 284.8 mV at 10/mA cm-2 in current density in situ for HER and OER, respectively. The electrocatalyst also exhibited low Tafel slopes of 56.36 mV/dec for HER and 112.85 mV/dec for OER, verifying their rapid catalytic kinetics. The electrolyzer maintained the cell voltage of 1.63 V and potential-time stability close to that of Pt/C & RuO2/C. The intrinsic mechanism for the exceptional HER and OER performance was further unravelled through first-principles density functional theory (DFT) calculations, predicting very low Gibbs free energy of hydrogen adsorption (ΔGH* ≈ 0.09 eV) and low overpotential (η = 0.47 eV at the Mn sites) for OER on the Fe0.75Mn0.25Ta1.875Nb0.125O6 catalyst. Our results demonstrate that columbite-tantalite electrocatalysts offer great promise for efficient overall water splitting. Graphical abstract

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Mixed solvent exfoliated transition metal oxides nanosheets based flexible solid state supercapacitor devices endowed with high energy density

Abstract: Mixed solvent exfoliated transition metal oxide nanosheet/SWCNT composite based flexible supercapacitors demonstrate large specific capacitance and high energy density.

Cited by 47 publications

References 97 publications

A Facile One‐Pot Hydrothermal Synthesis of Zn, Mn Co‐Doped NiCo₂O₄ as an Efficient Electrode for Supercapacitor Applications

A Facile One‐Pot Hydrothermal Synthesis of Zn, Mn Co‐Doped NiCo₂O₄ as an Efficient Electrode for Supercapacitor Applications

Two-Dimensional Transition Metal Oxide and Hydroxide-Based Hierarchical Architectures for Advanced Supercapacitor Materials

Extraction of non-noble metal columbite-tantalite as a highly efficient electrocatalyst for water splitting

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Mixed solvent exfoliated transition metal oxides nanosheets based flexible solid state supercapacitor devices endowed with high energy density

Abstract: Mixed solvent exfoliated transition metal oxide nanosheet/SWCNT composite based flexible supercapacitors demonstrate large specific capacitance and high energy density.

Cited by 47 publications

References 97 publications

A Facile One‐Pot Hydrothermal Synthesis of Zn, Mn Co‐Doped NiCo2O4 as an Efficient Electrode for Supercapacitor Applications

A Facile One‐Pot Hydrothermal Synthesis of Zn, Mn Co‐Doped NiCo2O4 as an Efficient Electrode for Supercapacitor Applications

Two-Dimensional Transition Metal Oxide and Hydroxide-Based Hierarchical Architectures for Advanced Supercapacitor Materials

Extraction of non-noble metal columbite-tantalite as a highly efficient electrocatalyst for water splitting

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A Facile One‐Pot Hydrothermal Synthesis of Zn, Mn Co‐Doped NiCo₂O₄ as an Efficient Electrode for Supercapacitor Applications

A Facile One‐Pot Hydrothermal Synthesis of Zn, Mn Co‐Doped NiCo₂O₄ as an Efficient Electrode for Supercapacitor Applications