Synthesis of NiMoO4 nanosheets on graphene sheets as advanced supercapacitor electrode materials

Li, Yongfeng; Jian, Jianming; Xiao, Liangjun; Wang, Hui; Yu, Lin; Cheng, Gao; Zhou, Junli; Sun, Ming

doi:10.1016/j.matlet.2016.08.012

Cited by 42 publications

(15 citation statements)

References 22 publications

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“…This is related to the electrode internal resistance, which limits the charge transfer at high scan rates. At lower scan rates, a pair of redox peaks could be seen in each CV curve, indicating the Faradic reaction of Ni(II)/Ni(III) [26,42] due to the reversible phase change between Ni(OH) 2 and NiOOH (0.44 V and 0.18 V) [43]. By scanning the electrode, the OH − ions will be dispersed on the surface of Ni(OH) 2 layer and form the NiOOH phase, as shown in Equation 6:…”

Section: Electrochemical Measurement Of the Nimoo 4 Nps And Nimoo 4 /mentioning

confidence: 98%

Synthesis of a NiMoO4/3D-rGO Nanocomposite via Starch Medium Precipitation Method for Supercapacitor Performance

et al. 2020

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This paper presents research on the synergistic effects of nickel molybdate and reduced graphene oxide as a nanocomposite for further development of energy storage systems. An enhancement in the electrochemical performance of supercapacitor electrodes occurs by synthesizing highly porous structures and achieving more surface area. In this work, a chemical precipitation technique was used to synthesize the NiMoO4/3D-rGO nanocomposite in a starch media. Starch was used to develop the porosities of the nanostructure. A temperature of 350 °C was applied to transform graphene oxide sheets to reduced graphene oxide and remove the starch to obtain the NiMoO4/3D-rGO nanocomposite with porous structure. The X-ray diffraction pattern of the NiMoO4 nano particles indicated a monoclinic structure. Also, the scanning electron microscope observation showed that the NiMoO4 NPs were dispersed across the rGO sheets. The electrochemical results of the NiMoO4/3D-rGO electrode revealed that the incorporation of rGO sheets with NiMoO4 NPs increased the capacity of the nanocomposite. Therefore, a significant increase in the specific capacity of the electrode was observed with the NiMoO4/3D-rGO nanocomposite (450 Cg−1 or 900 Fg−1) when compared with bare NiMoO4 nanoparticles (350 Cg−1 or 700 Fg−1) at the current density of 1 A g−1. Our findings show that the incorporation of rGO and NiMoO4 NP redox reactions with a porous structure can benefit the future development of supercapacitors.

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Section: Electrochemical Measurement Of the Nimoo 4 Nps And Nimoo 4 /mentioning

confidence: 98%

Synthesis of a NiMoO4/3D-rGO Nanocomposite via Starch Medium Precipitation Method for Supercapacitor Performance

et al. 2020

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“…Especially, the coupling of magnetic nanoparticles to the photocatalysts has an added advantage of easy magnetic separation. Other complex oxides which have high electrochemical activity such as Li 4 Ti 5 O 12 , NiMoO 4 , CdFe 2 O 4 , and CuFe 2 O 4 were also coupled with graphene through solvothermal crystallization route. Similarly metal oxide semiconductors such as Co 3 O 4 , MoO 3 SnO 2 , MnO 2 , Mn 3 O 4 , VO 2 , RuO 2 , Fe 3 O 4 , Cu 2 O, Bi 2 O 3 , Cr 2 O 3 , and WO 3 , V 2 O 5 , metal sulfides such as ZnS, NiS, CuS, CdS, Ni 3 S 2 , MoS 2 , VS 2 ,Ce doped SnS 2 , CuInS 2 , and Co 9 S 8 , metal nanoparticles such as Ni, were successfully integrated into graphene through solvothermal routes.…”

Section: Graphene‐based Materials From Subcritical Hydro‐/solvothermamentioning

confidence: 99%

“… Hydrothermally synthesized graphene‐based composites were also shown to meet the requirements for energy storage in supercapacitors. To list some of them (specific capacitance, current density, electrolyte are listed in bracket): TiO 2 ‐graphene composite (225 F g –1 at 0.125 A g –1 in 1.0 M Na 2 SO 4 ), Co 3 O 4 ‐graphene composite (415 F g –1 at 3 A g –1 in 6 M KOH), SnO 2 ‐graphene composite (364.3 F g –1 at 1.0 A g –1 in 1.0 M Na 2 SO 4 ), MnO 2‐ graphene composite (380 F g –1 at 0.3 A g –1 in 1.0 M KOH), Mn 3 O 4‐ graphene composite (121 F g –1 at 0.5 A g –1 in 1.0 M Na 2 SO 4 ), RuO 2 ‐graphene composite (497 F g –1 at 0.5 A g –1 , 521.2 F g –1 at 0.5 A g –1 , and 219 F g –1 at 1.0 A g –1 in 1.0 M H 2 SO 4 ), Cu 2 O‐graphene composite (215 F g –1 at 1.4 A g –1 in 6.0 M KOH), ZnS‐graphene composite (191 F g –1 at 0.5 A g –1 in 6.0 M KOH), Ni 3 S 2 ‐graphene composite (281.2 F g –1 at 0.5 A g –1 in 3.0 M KOH), NiCo 2 O 4 ‐graphene composite (698 F g –1 at 0.5 A g –1 in 2.0 M KOH), NiMoO 4 ‐graphene composite (1888 F g –1 at 1.0 A g –1 in 2.0 M KOH), CuFe 2 O 4 ‐graphene (576.6 F g –1 at 1.0 A g –1 in 3.0 M KOH), CoMn(CoMn) 2 O 4 ‐graphene composite (571 F g –1 at 1.0 A g –1 in 1.0 M KOH), NiAl‐LDH‐graphene composites (1329 F g –1 at 3.56 A g –1 in 6.0 M KOH) and (781.5 F g –1 at 0.5 A g –1 in 6.0 M KOH), NiCo‐LDH‐graphene composite (1911 F g –1 at 2.0 A g –1 in 3.0 M KOH), CoAl‐LDH‐graphene composite (581.5 F g –1 at 2.0 A g –1 in 1.0 M KOH), NiAl‐LDH‐CNT‐graphene composite (1869 F g –1 at 1.0 mA cm –2 in 6.0 M KOH), N rich carbon‐graphene composite (300.0 F g –1 at 0.1 A g –1 in 6.0 M KOH) …”

Section: Applications Of Graphene‐based Materials Synthesized From Hymentioning

confidence: 99%

Advances in Subcritical Hydro‐/Solvothermal Processing of Graphene Materials

2017

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Many promising graphene-based materials are kept away from mainstream applications due to problems of scalability and environmental concerns in their processing. Hydro-/solvothermal techniques overwhelmingly satisfy both the aforementioned criteria, and have matured as alternatives to wet-chemical methods with advances made over the past few decades. The insolubility of graphene in many solvents poses considerable difficulties in their processing. In this context hydro-/solvothermal techniques present an ideal opportunity for processing of graphenic materials with their versatility in manipulating the physical and thermodynamic properties of the solvent. The flexibility in hydro-/solvothermal techniques for manipulation of solvent composition, temperature and pressure provides numerous handles to manipulate graphene-based materials during synthesis. This review provides a comprehensive look at the subcritical hydro-/solvothermal synthesis of graphene-based functional materials and their applications. Several key synthetic strategies governing the morphology and properties of the products such as temperature, pressure, and solvent effects are elaborated. Advances in the synthesis, doping, and functionalization of graphene in hydro-/solvothermal media are highlighted together with our perspectives in the field.

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“…This is resolved by compositing the molybdates with carbon materials such as graphene. Graphene/NiMoO 4 , graphene/CoMoO 4 , graphene/MnMoO 4, graphene/ZnMoO 4 (Table ) have been explored as promising electrode materials for supercapacitors . Among them, the efforts to use graphene/ZnMoO 4 as an electrode material for supercapacitor applications have been scarce.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Graphene/Binary Metal Molybdate (Graphene/Zn_1−xNi_xMoO₄) Nanocomposite for Supercapacitors

Reddy

Vickraman

Justin

2018

Physica Status Solidi (a)

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A novel graphene/binary metal molybdate (Zn 1-x Ni x MoO 4 ) is synthesized via a facile and simple microwave synthesis route (x ¼ 0.0, 0.2, 0.4, 0.6, 0.8). Electrochemical studies are performed for all the samples to study their charge storage mechanism and frequency dependence in a three-electrode set up with 2M KOH electrolyte solution. Among the samples, Zn 0.6 Ni 0.4-MoO 4 shows better electrochemical performance which is combined with graphene so as to obtain graphene/Zn 1-x Ni x MoO 4 (x ¼ 0.4) nanocomposite. XRD and Raman analyses have confirmed formation of complexation of graphene/binary metal molybdate nanocomposite. TEM morphological profile illustrates little aggregation and interconnected layers of graphene interspersed with rice-like grains of binary metal molybdate. Graphene/Zn 1-x Ni x MoO 4 (x ¼ 0.4) exhibits good energy density and power density of 62.3 Wh kg À1 and 448.5 W kg À1 respectively with a specific capacitance of 555.5 F g À1 at 1 A g À1 . The electrode material with good cyclic stability of 85% even after 5000 charge/discharge cycles may be explored as a novel option for supercapacitors.

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Synthesis of NiMoO4 nanosheets on graphene sheets as advanced supercapacitor electrode materials

Cited by 42 publications

References 22 publications

Synthesis of a NiMoO4/3D-rGO Nanocomposite via Starch Medium Precipitation Method for Supercapacitor Performance

Synthesis of a NiMoO4/3D-rGO Nanocomposite via Starch Medium Precipitation Method for Supercapacitor Performance

Advances in Subcritical Hydro‐/Solvothermal Processing of Graphene Materials

Synthesis and Characterization of Graphene/Binary Metal Molybdate (Graphene/Zn_1−xNi_xMoO₄) Nanocomposite for Supercapacitors

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Synthesis of NiMoO4 nanosheets on graphene sheets as advanced supercapacitor electrode materials

Cited by 42 publications

References 22 publications

Synthesis of a NiMoO4/3D-rGO Nanocomposite via Starch Medium Precipitation Method for Supercapacitor Performance

Synthesis of a NiMoO4/3D-rGO Nanocomposite via Starch Medium Precipitation Method for Supercapacitor Performance

Advances in Subcritical Hydro‐/Solvothermal Processing of Graphene Materials

Synthesis and Characterization of Graphene/Binary Metal Molybdate (Graphene/Zn1−xNixMoO4) Nanocomposite for Supercapacitors

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Synthesis and Characterization of Graphene/Binary Metal Molybdate (Graphene/Zn_1−xNi_xMoO₄) Nanocomposite for Supercapacitors