Effect of various aqueous electrolytes on the electrochemical performance of α-MnO2 nanorods as electrode materials for supercapacitor application

Jayachandran, M.; Rose, Aleena; Maiyalagan, T.; Poongodi, N.; Vijayakumar, T.

doi:10.1016/j.electacta.2020.137412

Cited by 99 publications

(26 citation statements)

References 58 publications

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“…Randles circuits are also frequently applied [93]- [95], as is the case with most applications. In supercapacitor applications an inductor is sometimes connected serially [96] in the Randles circuit.…”

Section: ) Supercapacitorsmentioning

confidence: 99%

Equivalent Electrical Circuits and Their Use Across Electrochemical Impedance Spectroscopy Application Domains

2022

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When studying electrochemical systems, EIS practitioners face the challenge of choosing a relevant equivalent electrical circuit to analyze their measurement data and interpreting the role of its components. In this review, we take a closer look at the use of equivalent electrical circuits (EEC) across various application domains. We aim to aid EIS practitioners in determining and evaluating their EEC-based data analysis methodology in light of recent progress from all EIS application domains. We review EEC usage and its interpretation while additionally providing software to automatically search for equivalent electrical circuits from the relevant application domain literature that fit EIS measurements supplied by users. Finally, we make a comparison of the impedimetric behaviour and circuit modelling approaches of a range of different electrochemical systems and discuss some complementary EIS data analysis strategies.

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Section: ) Supercapacitorsmentioning

confidence: 99%

Equivalent Electrical Circuits and Their Use Across Electrochemical Impedance Spectroscopy Application Domains

2022

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“…To date, OA mechanism has been used to fabricate different metal/metal oxides/ metal hydroxides 1D nanostructures to use in different applications. Few recent examples of controlled synthesis of different nanorods and nanowires are Au [34], NiO [35], Sb 2 O 3 [36], Co 3 O 4 [35], ZnO [37][38][39], TiO 2 [40], MnO 2 [41],CuO [42,43], Cu (OH) 2 [44], and GaOOH [45] for optoelectronic devices, electrochemical devices, and supercapacitors. Although these metal/metal oxide nanostructures have been cited as OA mechanism-based nanostructures, only few studies have investigated the crystal growth mechanism with the understanding of their guiding principles.…”

Section: Recent Progress Of Oa-based Metal/metal Oxide Nanostructuresmentioning

confidence: 99%

Oriented Attachment Crystal Growth Dynamics of Anisotropic One-dimensional Metal/Metal Oxide Nanostructures: Mechanism, Evidence, and Challenges

Pathiraja¹,

Obare²,

Rathnayake³

2023

Crystal Growth and Chirality - Technologies and Applications

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One-dimensional (1D) inorganic metal/metal oxide nanostructures are of significant interest due to their distinctive physical and chemical properties that are beneficial for various applications. A fundamental understanding of the guiding principles that control the anisotropy and the size of the nanostructures is essential toward developing the building blocks for the fabrication of leading-edge miniaturized devices. Oriented attachment (OA) crystal growth mechanism has been recognized as an effective mechanism for producing 1D anisotropic nanostructures. However, a limited understanding of the OA mechanism could impede the controlled fabrication of 1D nanostructures. This chapter provides a comprehensive summary on recent advances of the OA mechanism and the current state of the art on various in-situ, ex-situ, and theoretical investigations of OA-based crystal growth dynamics as well as the shape and size-controlled kinetics. Other competing crystal growth mechanisms, including seed-mediated growth and Ostwald ripening (OR), are also described. Further, we thoroughly discuss the knowledge gap in current OA kinetic models and the necessity of new kinetic models to elucidate the elongation growth of anisotropic nanostructures. Finally, we provide the current limitations, challenges for the understanding of crystal growth dynamics, and future perspectives to amplify the contributions for the controlled self-assembled 1D nanostructures. This chapter will lay the foundation toward designing novel complex anisotropic materials for future smart devices.

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“…6a appear in the CV patterns of active material of 1 M Na 2 SO 4 electrolyte performed were not found in rectangular shape so the redox peaks of the active material as confirmed as surface redox pseudocapaciatnce behavior. The specific capacitance of the active material is 138 F/g at 5 mV/ s [36].…”

Section: Electrochemical Studies Of V 2 O 5 Spindle-like Structure Elmentioning

confidence: 99%

Effect of various aqueous electrolytes on the electrochemical performance of V2O5 spindle-like nanostructures as electrode material for supercapacitor application

Jayachandran

Rose

Maiyalagan

et al. 2021

J Mater Sci: Mater Electron

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The electrochemical behavior of V 2 O 5 spindle-like nanostructures synthesized through hydrothermal method is studied for supercapacitor applications. The electrochemical supercapacitive performance of the prepared electrode was investigated using cyclic voltammeters (CV), Chronopotentiometry (CP), and Electrochemical impedance spectroscopy (EIS) analyses. The crystallographic structure and phase purity of the V 2 O 5 electrode is investigated by the X-ray diffraction (XRD) analysis. To further confirm the formation of V 2 O 5 , the Fourier-transform infrared (FT-IR) spectroscopy, and Fourier-transform Raman spectroscopy (FT-Raman) investigations were carried out. The formation of V 2 O 5 is confirmed by high-resolution transmission electron microscopy (HR-TEM) analyses. The electrode material delivered a high specific capacitance of 403F/g at 1A/g current density in the mixed electrolyte solution (1 M Na 2-SO 4 ? 0.5 M KOH). In this mixed electrolyte, V 2 O 5 spindle-like electrode showed a good cyclic stability of 3000 cycles with better capacity retention of 85% at 10A/g.

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Effect of various aqueous electrolytes on the electrochemical performance of α-MnO2 nanorods as electrode materials for supercapacitor application

Cited by 99 publications

References 58 publications

Equivalent Electrical Circuits and Their Use Across Electrochemical Impedance Spectroscopy Application Domains

Equivalent Electrical Circuits and Their Use Across Electrochemical Impedance Spectroscopy Application Domains

Oriented Attachment Crystal Growth Dynamics of Anisotropic One-dimensional Metal/Metal Oxide Nanostructures: Mechanism, Evidence, and Challenges

Effect of various aqueous electrolytes on the electrochemical performance of V2O5 spindle-like nanostructures as electrode material for supercapacitor application

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