Facile synthesis and characterization of high-performance NiMoO4 · xH2O nanorods electrode material for supercapacitors

Abstract

One-dimensional NiMoO 4 · xH 2 O nanorods were synthesized by a facile template-free hydrothermal method as a potential electrode material for supercapacitors. The influences of reaction temperature, reaction time, and nickel source on the properties of resultant samples were investigated. Electrochemical data reveal that the as-synthesized one-dimensional NiMoO 4 · xH 2 O nanorod superstructures can deliver a remarkable specific capacitance (SC) of 1131 F g −1 at a current density of 1 A g −1 and remain as high as 914 F g −1 at 10 A g −1 in a 6 M KOH aqueous solution. Moreover, there is only 6.2 % loss of the maximum SC after 1000 continuous charge-discharge cycles at the high current density of 10 A g −1 . Such outstanding electrochemical performance may be owing to the unique one-dimensional hierarchical structures, which can facilitate the electrolyte ions and electrons to easily contact the NiMoO 4 nanorod building blocks and then allow for sufficient faradaic reactions to take place, even at high current densities.

Hierarchical Molybdenum Dioxide Microflowers Encapsulating Nickel Nanoparticles for High‐Performance Lithium‐Ion Battery Electrodes

“…To illustrate the structure and morphology of NiMoO 4 nanowires, X‐ray diffraction (XRD) patterns and scanning electron microscope (SEM) analyzes are performed. As shown in Figure A, the characteristic diffraction peaks at 27.2°, 29.9° and 60.3° match well with standard data for NiMoO 4 ⋅ xH 2 O (JCPDS#13‐0128), and peaks at 13.3° and 34.2° are corresponded to the standard patterns for NiMoO 4 (JCPDS#12‐0348) . Notably, the NiMoO 4 nanowires with diameter around 100 nm grew uniformly (Figure B).…”

Preparation, Characterization and Catalytic Activity of Nickel Molybdate (NiMoO4) Nanoparticles

“…Bettahar et al tested the NiMoO 4 as a catalyst in the partial oxidation of hydrocarbons such as propene or propylene [ 12 ]. The nickel molybdate was also studied for supercapacitor application by Yao et al and Liu et al [ 13 , 14 , 15 ]. NiMoO 4 found also it applicable in the photocatalytic degradation of organic dyes such as methyl orange proposed by Alborzi et al Mosleh et al [ 16 , 17 ] or methylene blue studied by Yang et al [ 18 ].…”

“…A sol-gel method was also used for the preparation of the NiMoO 4 by Baoyi and coworkers [ 11 ] that shows a better catalytic activity for oxidative dehydrogenation of propane. Different shapes were reported going from nanospherical, nanorods to nanosheets [ 15 , 27 , 28 , 29 ]. However, all of the previously reported methods required a strict reaction conditions and high temperature or high pressure.…”

Highly Efficient Methylene Blue Dye Removal by Nickel Molybdate Nanosorbent

“…Nickel molybdate (NiMoO 4 ) has various applications in catalysis such as hydrodesulfurization and hydrodenitrogenation reactions [ 34 , 35 ], oxidative dehydrogenation of light alkanes [ 36 , 37 , 38 , 39 , 40 ], partial oxidation of hydrocarbons [ 41 ], and microwave applications [ 42 ]. It is also used in humidity sensors [ 43 ], supercapacitors [ 44 , 45 ], optical fibers, and military devices [ 46 ]. Nickel molybdate has attractive structures and electrochemical and magnetic properties [ 47 , 48 ], and it can be found in two crystalline forms, α-NiMoO 4 and β-NiMoO 4 .…”

“…Various methods of NiMoO 4 synthesis have been presented in the literature, including sonochemical [ 49 , 50 ], hydrothermal [ 46 , 51 , 52 ], precipitation [ 53 , 54 ], sol–gel [ 53 ], mechanochemical synthesis [ 55 ], solid state at high temperature [ 56 , 57 ], and microwave-assisted methods [ 58 ].…”