Hydrothermal synthesis of mesoporous NiMnO3 nanostructures for supercapacitor application: Effect of electrolyte

Dhas, Suprimkumar D.; Maldar, P.S.; Patil, Meenal D.; Hubali, K.M.; Shembade, Umesh V.; Abitkar, S.B.; Waikar, Maqsood R.; Sonkawade, R. G.; Agawane, G.L.; Moholkar, A.V.

doi:10.1016/j.est.2021.102277

Cited by 37 publications

(13 citation statements)

References 38 publications

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“…Particularly, the characteristic peak at 2θ = 25.8° corresponding to GQD shows variations in its relative intensity as of 3% in pure MnAP, 6% in MnAP@GQD1, 7% in MnAP@GQD2, 13% in MnAP@GQD3, and 15% in MnAP@GQD4 revealing the concentration dependency of GQD in MnAP. The crystallite sizes by Debye‐Scherrer calculations show 56 nm > 53 nm > 52 nm > 42 nm < 51 nm for pure MnAP, MnAP@GQD1, MnAP@GQD2, MnAP@GQD3, and MnAP@GQD4, respectively 40 …”

Section: Resultsmentioning

confidence: 97%

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Role of dual redox additivesKI/VOSO₄in manganese ammonium phosphate at graphene quantum dots for supercapattery

Raja

Vickraman

2022

Intl J of Energy Research

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The hybrid electrodes MnAP@GQD x are synthesized through microwave route for four graphene quantum dots (GQD) variates (x = 25, 50, 75, and 100 mg). The Debye-Scherrer calculations show lower crystallite size for MnAP at 75 mg GQD. In Raman studies, among all GQD variates the 75 mg GQD doped MnAP composite reveal higher I D /I G ratio (1.03). The electrochemical performance shows higher specific capacitance 596 Fg À1 at 1 Ag À1 for it. Thus, XRD, Raman, and CV studies identified 75 mg GQD as the appropriate mass dispersoid for MnAP lattice. This optimized MnAP at 75 mg GQD has been subjected to scanning electron microscopy (SEM), transmission electron microscopy (TEM), brunauer-emmet-teller (BET), and X-ray Photoelectron Spectroscopy (XPS). The SEM shows broken rectangular micro platelets for MnAP, and its disintegration after doping GQD x¼75 mg shows strong complexation. The BET study reveals mesoporosity (3 nm) favoring for better ionic transport, and the XPS accounts for the oxidation states. In full-cell, MnAP@GQD x¼75 mg as a positrode // rGO negatrode, has shown 442 Fg À1 at 1 Ag À1 in 3M H 2 SO 4 at 0-1.8 V. Further enhancement 693 Fg À1 in it, is achieved by dispersing dual redox additives 0.025M (KI/VOSO 4 ) in 3M H 2 SO 4 with 311 Wh kg À1 /450 W kg À1 at 1 Ag À1 and having the capacity retention 82% for 5000 cycles at 20 Ag À1 . Thus, increase in specific capacitance for this optimized electrode is observed for dual redox additives in 3M H 2 SO 4 suggestive for high-performance supercapattery applications.

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Section: Resultsmentioning

confidence: 97%

“…The crystallite sizes by Debye-Scherrer calculations show 56 nm > 53 nm > 52 nm > 42 nm < 51 nm for pure MnAP, MnAP@GQD1, MnAP@GQD2, MnAP@GQD3, and MnAP@GQD4, respectively. 40…”

Section: Xrd Studiesmentioning

confidence: 99%

Role of dual redox additivesKI/VOSO₄in manganese ammonium phosphate at graphene quantum dots for supercapattery

Raja

Vickraman

2022

Intl J of Energy Research

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“…The capacitance value depends on the size difference, ionic conductivity, mobility of the system, and thermal and electrochemical stability based on its reactivity at different temperature conditions [110] . Depending on the types of electrolytes (aqueous, organic/inorganic, and ionic liquids) used in SCs, it can offer different OPWs to the SC, either a wide or narrow OPW, affecting the total energy density and power density of the system [115] . Aside from this effect, the ability of the electrolyte to interact with either electrode materials or the solvent itself in which the electrolyte is dissolved, may induce self‐discharge phenomena in the SC and, as a result, can significantly alter the charging‐discharging cycle.…”

Section: Working Principle Of Supercapacitorsmentioning

confidence: 99%

“…[110] Depending on the types of electrolytes (aqueous, organic/inorganic, and ionic liquids) used in SCs, it can offer different OPWs to the SC, either a wide or narrow OPW, affecting the total energy density and power density of the system. [115] Aside from this effect, the ability of the electrolyte to interact with either electrode materials or the solvent itself in which the electrolyte is dissolved, may induce self-discharge phenomena in the SC and, as a result, can significantly alter the charging-discharging cycle. Due to such versatility of the electrolyte system, electrolytes used in SCs are categorized into several types: liquid and solid-state or quasisolid-state electrolytes.…”

Section: Working Principle Of Supercapacitorsmentioning

confidence: 99%

Recent Advances in Carbon and Metal Based Supramolecular Technology for Supercapacitor Applications

Hasan

Islam

Shah

et al. 2022

The Chemical Record

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As the world moves towards renewable and sustainable energy sources, the need for systems that can quickly and safely store this energy is also rising. Supercapacitors (SCs) are among the most promising alternatives to conventional lithium‐ion batteries. SCs are more stable, have higher‐power densities, and can be charged much faster. However, SCs have their issues, and three of the main drawbacks of current SCs are 1) lower energy densities, 2) high cost of production, and 3) safety concerns in wearable devices. In this review, we discuss recent progress made in supramolecule‐based SCs (SSCs). In supramolecular systems, molecules are held stable using non‐covalent‐type bonds. This allows for a flexible system in which the molecular interaction sites can easily break and reform at low energy, allowing for exposure of highly active sites and self‐healing. When heterometal atoms are introduced into these supramolecular systems, this allows for further activation of the metal sites through the metal‐metal interaction along with the metal‐ligand interactions. This review discusses different types of SSCs (carbon‐based and metal‐incorporated) that have been utilized in recent years depending on their synthesis process. The working principle of SSCs and the utilization of different supramolecular elements that enhance the performance of SCs have also been discussed.

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“…where, m (g), I (A), and Δt (s) express the mass of the electrode materials on NiF, discharge current density and discharge time, respectively. The Coulombic efficiency (η) is also calculated from the following equation: 36,37 η ¼…”

Section: Electrochemical Measurementsmentioning

confidence: 99%

Bimetallic CoSe₂/FeSe₂ hollow nanocuboids assembled by nanoparticles as a positive electrode material for a high-performance hybrid supercapacitor

Shirvani

Davarani

2022

Dalton Trans.

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Hydrothermal synthesis of mesoporous NiMnO3 nanostructures for supercapacitor application: Effect of electrolyte

Cited by 37 publications

References 38 publications

Role of dual redox additivesKI/VOSO₄in manganese ammonium phosphate at graphene quantum dots for supercapattery

Role of dual redox additivesKI/VOSO₄in manganese ammonium phosphate at graphene quantum dots for supercapattery

Recent Advances in Carbon and Metal Based Supramolecular Technology for Supercapacitor Applications

Bimetallic CoSe₂/FeSe₂ hollow nanocuboids assembled by nanoparticles as a positive electrode material for a high-performance hybrid supercapacitor

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Hydrothermal synthesis of mesoporous NiMnO3 nanostructures for supercapacitor application: Effect of electrolyte

Cited by 37 publications

References 38 publications

Role of dual redox additivesKI/VOSO4in manganese ammonium phosphate at graphene quantum dots for supercapattery

Role of dual redox additivesKI/VOSO4in manganese ammonium phosphate at graphene quantum dots for supercapattery

Recent Advances in Carbon and Metal Based Supramolecular Technology for Supercapacitor Applications

Bimetallic CoSe2/FeSe2 hollow nanocuboids assembled by nanoparticles as a positive electrode material for a high-performance hybrid supercapacitor

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Role of dual redox additivesKI/VOSO₄in manganese ammonium phosphate at graphene quantum dots for supercapattery

Role of dual redox additivesKI/VOSO₄in manganese ammonium phosphate at graphene quantum dots for supercapattery

Bimetallic CoSe₂/FeSe₂ hollow nanocuboids assembled by nanoparticles as a positive electrode material for a high-performance hybrid supercapacitor