Zinc‐Doped Nickel Oxide Hollow Microspheres – Preparation Hydrothermal Synthesis and Electrochemical Properties

Abstract

By using NiSO 4 ·6H 2 O and Zn(NO 3 ) 2 as raw materials, zinc-doped nickel oxide hollow microspheres (Zn-NiO-HM) were prepared through a hydrothermal method. Scanning electron microscope (SEM), transmission electron microscope (TEM), Xray photoelectron spectra (XPS), cyclic voltammetry (CV), galvanostatic current charge-discharge (GCD) and electro-chemical impedance spectroscopy (EIS) were used to characterize the structure and the electrochemical properties of the Zn-NiO-HM.[a]

Long-Lasting Panchromatic Electrochromic Device and Energy-Dense Supercapacitor Based on Zn-Doped NiO Microstars and a Redox-Active Gel

“…In this study, we report the synthesis, characterization, and application of Zn-doped NiO (Zn:NiO) microstars to high performance supercapacitors and high-contrast ECDs with panchromatic visible light absorption capability. Surprisingly, there are very few reports on Zn-doped NiO for supercapacitors. , For Zn–NiO hollow spheres, the authors obtained a SC of 255 F g –1 (at 0.5 A g –1 ) in a KOH electrolyte in a 3-electrode cell . An alkaline aqueous liquid electrolyte drastically limits the application potential of such devices, and in this study, this limitation has been surmounted by using an organic gel electrolyte.…”

“…Surprisingly, there are very few reports on Zn-doped NiO for supercapacitors. 12,13 For Zn−NiO hollow spheres, the authors obtained a SC of 255 F g −1 (at 0.5 A g −1 ) in a KOH electrolyte in a 3-electrode cell. 12 An alkaline aqueous liquid electrolyte drastically limits the application potential of such devices, and in this study, this limitation has been surmounted by using an organic gel electrolyte.…”

Electro-chemical studies of Zn doped nickel oxide nanoparticles synthesized via solution combustion method using green and chemical fuels

“…The redox process has a major role in the capacitance of the electrical double layer, as evidenced by the approximately rectangular form of the observed CVs. 15,31 The complete oxidation of nickel from +2 to +3 results in an electrode treated with additives that has a substantially higher capacity, allowing for effective use. 15 Randles-Sevcik's formula (eqn ( 5)) for reversible processes 19 represents the height current as,…”

Coaxial nanofibers of nickel/gadolinium oxide/nickel oxide as highly effective electrocatalysts for hydrogen evolution reaction

“…Nickel oxide can be used in advanced technologies depending on its synthesis conditions and microstructures [9][10][11][12][13][14][15][16]. Many routes have been successfully applied to fabricate different NiO morphologies, including precipitation methods [17], hydrothermal [18,19], solvothermal [20,21], microemulsion [22,23], oxidation of metallic Ni [24], thermal decomposition of Ni(II)-metalloorganic [25] and electrospinning [26][27][28][29][30][31]. Among these methods, the electrospinning has turned out to be a preferable choice because of its simplicity and scalability to yield nanofibers at an industrial level, and easy control over the morphology of the nanofibers [32][33][34][35][36][37][38][39][40].…”