PEG Assisted Hydrothermal Fabrication of Undoped and Cr Doped NiCo<sub>2</sub>O<sub>4</sub> Nanorods and Their Electrochemical Performance for Supercapacitor Application

Uke, Santosh J.; Akhare, V. P.; Meshram-Mardikar, Satish P.; Bodade, Anjali B.; Chaudhari, G. N.

doi:10.1166/asem.2019.2367

Cited by 19 publications

(3 citation statements)

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“…This paper presents a simple synthesis of a NiCo 2 O 4 spinel oxide via a one-pot solvothermal process. Nickel and cobalt precursors were picked for their high theoretical capacitance and similar potential during electrochemical reactions [ 31 ]. Our TMO particles have interesting architecture, representing spheres aggregated into rods.…”

Section: Introductionmentioning

confidence: 99%

Spinel of Nickel-Cobalt Oxide with Rod-Like Architecture as Electrocatalyst for Oxygen Evolution Reaction

et al. 2020

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The renewable energy technologies require electrocatalysts for reactions, such as the oxygen and/or hydrogen evolution reaction (OER/HER). They are complex electrochemical reactions that take place through the direct transfer of electrons. However, mostly they have high over-potentials and slow kinetics, that is why they require electrocatalysts to lower the over-potential of the reactions and enhance the reaction rate. The commercially used catalysts (e.g., ruthenium nanoparticles—Ru, iridium nanoparticles—Ir, and their oxides: RuO2, IrO2, platinum—Pt) contain metals that have poor stability, and are not economically worthwhile for widespread application. Here, we propose the spinel structure of nickel-cobalt oxide (NiCo2O4) fabricated to serve as electrocatalyst for OER. These structures were obtained by a facile two-step method: (1) One-pot solvothermal reaction and subsequently (2) pyrolysis or carbonization, respectively. This material exhibits novel rod-like morphology formed by tiny spheres. The presence of transition metal particles such as Co and Ni due to their conductivity and electron configurations provides a great number of active sites, which brings superior electrochemical performance in oxygen evolution and good stability in long-term tests. Therefore, it is believed that we propose interesting low-cost material that can act as a super stable catalyst in OER.

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Section: Introductionmentioning

confidence: 99%

Spinel of Nickel-Cobalt Oxide with Rod-Like Architecture as Electrocatalyst for Oxygen Evolution Reaction

et al. 2020

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“…Furthermore, the SCPs are also promising and mature electrochemical energy storage technologies owing to their outstanding qualities such as low cost, moderate energy density, high specific capacitance, high retention in capacitance and environmentally friendly nature [ 9 ]. For commercialization of any electrical energy system, the parameters like energy density, power density, capacitance, cycle life and shelf life are the key parameters which further drive the effectiveness of these ESS [ 3 , 10 , 11 ]. The positive electrode (cathode), negative electrode (anode), electrolyte and separator are the main components of the ESS.…”

Section: Introductionmentioning

confidence: 99%

A review of π-conjugated polymer-based nanocomposites for metal-ion batteries and supercapacitors

et al. 2021

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Owing to their extraordinary properties of π-conjugated polymers (π-CPs), such as light weight, structural versatility, ease of synthesis and environmentally friendly nature, they have attracted considerable attention as electrode material for metal-ion batteries (MIBs) and supercapacitors (SCPs). Recently, researchers have focused on developing nanostructured π-CPs and their composites with metal oxides and carbon-based materials to enhance the energy density and capacitive performance of MIBs and SCPs. Also, the researchers recently demonstrated various novel strategies to combine high electrical conductivity and high redox activity of different π-CPs. To reflect this fact, the present review investigates the current advancements in the synthesis of nanostructured π-CPs and their composites. Further, this review explores the recent development in different methods for the fabrication and design of π-CPs electrodes for MIBs and SCPs. In review, finally, the future prospects and challenges of π-CPs as an electrode materials for strategies for MIBs and SCPs are also presented.

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“…NiCo 2 O 4 is a spinel-type, AB 2 O 4 , binary metal oxide where nickel cations occupy octahedral sites and cobalt cations are randomly distributed on both tetrahedral and octahedral sites [26]. Doped NiCo 2 O 4 with various transition metals, e.g., Ni 1−x Ru x Co 2 O 4 [27], Ni 1−x Mn x Co 2 O 4 [28], Ni 1−x Cr x Co 2 O 4 [29], Ni 1−x Zn x Co 2 O 4 [30], Ni 1−x Fe x Co 2 O 4 [31], and Ni 1−x Ca x Co 2 O 4 [32], have been studied to understand the effect on morphology and their electrochemical performance. This paper describes a simple hydrothermal method for making Al 3+ doped NiCo 2 O 4, i.e., Ni 1−x Al x Co 2 O 4 .…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Performance of Aluminum Doped Ni1−xAlxCo2O4 Hierarchical Nanostructure: Experimental and Theoretical Study

et al. 2021

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For electrochemical supercapacitors, nickel cobaltite (NiCo2O4) has emerged as a new energy storage material. The electrocapacitive performance of metal oxides is significantly influenced by their morphology and electrical characteristics. The synthesis route can modulate the morphological structure, while their energy band gaps and defects can vary the electrical properties. In addition to modifying the energy band gap, doping can improve crystal stability and refine grain size, providing much-needed surface area for high specific capacitance. This study evaluates the electrochemical performance of aluminum-doped Ni1−xAlxCo2O4 (0 ≤ x ≤ 0.8) compounds. The Ni1−xAlxCo2O4 samples were synthesized through a hydrothermal method by varying the Al to Ni molar ratio. The physical, morphological, and electrochemical properties of Ni1−xAlxCo2O4 are observed to vary with Al3+ content. A morphological change from urchin-like spheres to nanoplate-like structures with a concomitant increase in the surface area, reaching up to 189 m2/g for x = 0.8, was observed with increasing Al3+ content in Ni1−xAlxCo2O4. The electrochemical performance of Ni1−xAlxCo2O4 as an electrode was assessed in a 3M KOH solution. The high specific capacitance of 512 F/g at a 2 mV/s scan rate, 268 F/g at a current density of 0.5 A/g, and energy density of 12.4 Wh/kg was observed for the x = 0.0 sample, which was reduced upon further Al3+ substitution. The as-synthesized Ni1−xAlxCo2O4 electrode exhibited a maximum energy density of 12.4 W h kg−1 with an outstanding high-power density of approximately 6316.6 W h kg−1 for x = 0.0 and an energy density of 8.7 W h kg−1 with an outstanding high-power density of approximately 6670.9 W h kg−1 for x = 0.6. The capacitance retention of 97% and 108.52% and the Coulombic efficiency of 100% and 99.24% were observed for x = 0.0 and x = 0.8, respectively. First-principles density functional theory (DFT) calculations show that the band-gap energy of Ni1−xAlxCo2O4 remained largely invariant with the Al3+ substitution for low Al3+ content. Although the capacitance performance is reduced upon Al3+ doping, overall, the Al3+ doped Ni1−xAlxCo2O4 displayed good energy, powder density, and retention performance. Thus, Al3+ could be a cost-effective alternative in replacing Ni with the performance trade off.

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PEG Assisted Hydrothermal Fabrication of Undoped and Cr Doped NiCo₂O₄ Nanorods and Their Electrochemical Performance for Supercapacitor Application

Cited by 19 publications

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Spinel of Nickel-Cobalt Oxide with Rod-Like Architecture as Electrocatalyst for Oxygen Evolution Reaction

Spinel of Nickel-Cobalt Oxide with Rod-Like Architecture as Electrocatalyst for Oxygen Evolution Reaction

A review of π-conjugated polymer-based nanocomposites for metal-ion batteries and supercapacitors

Electrochemical Performance of Aluminum Doped Ni1−xAlxCo2O4 Hierarchical Nanostructure: Experimental and Theoretical Study

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PEG Assisted Hydrothermal Fabrication of Undoped and Cr Doped NiCo2O4 Nanorods and Their Electrochemical Performance for Supercapacitor Application

Cited by 19 publications

References 0 publications

Spinel of Nickel-Cobalt Oxide with Rod-Like Architecture as Electrocatalyst for Oxygen Evolution Reaction

Spinel of Nickel-Cobalt Oxide with Rod-Like Architecture as Electrocatalyst for Oxygen Evolution Reaction

A review of π-conjugated polymer-based nanocomposites for metal-ion batteries and supercapacitors

Electrochemical Performance of Aluminum Doped Ni1−xAlxCo2O4 Hierarchical Nanostructure: Experimental and Theoretical Study

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PEG Assisted Hydrothermal Fabrication of Undoped and Cr Doped NiCo₂O₄ Nanorods and Their Electrochemical Performance for Supercapacitor Application