A high-performance pseudocapacitive electrode material for supercapacitors based on the unique NiMoO4/NiO nanoflowers

Xu, Rui; Lin, Jianming; Wu, Jihuai; Huang, Miaoliang; Fan, Leqing; Xu, Zedong; Song, Zeyu

doi:10.1016/j.apsusc.2018.08.172

Cited by 96 publications

(57 citation statements)

References 54 publications

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“…Apparently, NiO@NiMoO 4 @PPy shows the highest capacitance and the most excellent cycling stability among all samples. Compared with mesoporous NiMoO 4 nanosheets (86.7% http://engine.scichina.com/doi/10.1016/j.scib.2020.01.011 retention at 15 mA cm À2 after 2000 cycles) [51] and NiMoO 4 @NiO nanoflowers (98.6% retention at 11 mA cm À2 after 3000 cycles) [22], the NiO@NiMoO 4 @PPy also shows excellent long-term cycling stability. The results show that the reversible capacitance of NiO can be highly improved by NiMoO 4 and PPy modification.…”

Section: Fig 4 Indicates Sem Images Of Nio Nimoo 4 Nio@nimoo 4 Andmentioning

confidence: 99%

“…Among them, TMOs have attracted broad attention due to the low cost, ease of synthesis, environmental benignity and high theoretical capacity [19,20]. Especially, nanostructured NiO has been regarded as one of hopeful candidates because of the large theoretical specific capacitance (~2584 F g À1 ), low cost and good chemical stability [21,22]. Nonetheless, the intrinsic drawbacks of the TMOs with poor electronic conductivity of the crystalline structure result in the terrible cycle performance, which impede the practical application [23].…”

Section: Introductionmentioning

confidence: 99%

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Porous spherical NiO@NiMoO4@PPy nanoarchitectures as advanced electrochemical pseudocapacitor materials

et al. 2020

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Section: Fig 4 Indicates Sem Images Of Nio Nimoo 4 Nio@nimoo 4 Andmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Porous spherical NiO@NiMoO4@PPy nanoarchitectures as advanced electrochemical pseudocapacitor materials

et al. 2020

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“…[37] While for the Mo 3d spectrum of NiMoO 4 , typical signals at 235.44 and 232.28 eV corresponded to Mo 3d 3/2 and 3d 5/2 of Mo ion (VI) of nickel molybdate (Figure S3d, Supporting Information). [38] Figure 2c showed two spin-orbit doublets with its satellites of Ni 2p. The 2p 1/2 and 2p 3/2 of nickel ion (II) could be found at binding energy signal at 871.33 and 854.22 eV and the signals at 874.10 and 856.18 eV were in accordance with the 2p 1/2 and 2p 3/2 of nickel ion (III), respectively.…”

Section: Resultsmentioning

confidence: 96%

“…The above results further confirmed the successful synthesis of two different composites through different calcination process. [38] The electrocatalytic HER activity of obtained Ni 9 S 8 /MoS 2 @ NiMoO 4 was carried out in alkaline solution via the threeelectrode system. For comparison, NiMoO 4 and commercial Pt/C were tested under the same condition.…”

Section: Resultsmentioning

confidence: 99%

Building Ni₉S₈/MoS₂ Nanosheets Decorated NiMoO₄ Nanorods Heterostructure for Enhanced Water Splitting

Chen

Deng

Chen

et al. 2021

Adv Materials Inter

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precious metal-based electrocatalysts, such as platinum, iridium, or ruthenium, exhibit the outstanding catalytic performance, the costly price and scarcity confine their wide application. [6,7] Hence, it is compulsory to explore cost-effective, highly efficient, and long-life catalysts based on nonprecious metals. [8] Recently, transition metal-based electrocatalysts including transition-metal nitride, [9] phosphides, [10,11] and oxides [12] have been widely used for water splitting. Among them, transition metal sulfides included both layered MS 2 (such as MoS 2 , WS 2 ) and nonlayered M x S y (such as Co 9 S 8 , ZnS) are at the cutting edge owing to their structural diversity, electrical activity, and superior electrocatalytic performance. [13,14] Especially, molybdenum sulfide (MoS 2 ), which possesses 2D structure, stable physical, and chemical properties, has showed the superior HER activity in acidic and base media. [15] However, the HER performances of layered MoS 2 materials are still unable to overshine the Pt-based electrocatalysts because of poor conductivity and unexposed active sites. [1,16] To overcome these shortcomings, hybridizing MoS 2 with other active composites with high electrical conductivity to build heterostructure is a promising strategy, which exhibits synergistically promoted kinetics and tunes the electron configuration and possesses diverse active sites. [17] For instance, nickel sulfides (Ni x S y ) not only display good conductivity, but also are active for OER. [16,18] Many reports have illustrated that hybridizing two or more metal sulfides into a composite can significantly prompt the HER performance, even it provides a considerable solution to construct electrocatalysts for water splitting. [19,20] The promoted performance for such binary nanostructures could be primarily ascribed from modulated the electronic structure, their abundant reactive redox sites, synergistic interfaces, and customized conductivity. [21] For instance, Liu's group reported the yolk-shell MoS 2 /NiS-based materials for electrochemical water splitting only requiring a potential of 1.64 V in the base solution at 10 mA cm −2 . [22] Feng et al. constructed MoS 2 / Ni 3 S 2 nanocomposites on nickel foam generating ample interfaces. [23] Zhai et al. reported NiS 2 /CoS 2 /MoS 2 nanosheet arrays vertically grown on Ni foam by two facile procedures. [24] Nonetheless, the scarcity of inherent conductivity hinders these bifunctional nanohybrids to be the best replacement for precious-metal based electrocatalysts. [25] Consequently, structural construction and optimization linked to conductivity and performance are significant to attain advanced binary hybrids.

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“…The peak spacing of the two peaks is 17.7 eV, indicating the presence of Ni 2 + in the sample. [24] Binding energy peaks at 862.33 and 880.33 eV are assigned to satellite peaks. [25] Figure 4d shows that the binding energies of Mo 3d 5/2 and Mo 3d 3/2 are 232.63 eV and 235.73 eV, respectively.…”

Section: Resultsmentioning

confidence: 99%

Fe₂O₃/NiMoO₄ Heterostructured Microspheres as an Anode Material for Long‐Life and High‐Performance Lithium Storage

Yang

Jiang

et al. 2021

ChemElectroChem

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Fe 2 O 3 /NiMoO 4 heterostructured microspheres were prepared by a two-step hydrothermal method followed by calcination. The Fe 2 O 3 component in the composite is evolved from FeMoO 4 , which inherits the advantage of high capacity of FeMoO 4 . The heterogeneous structure of the microspheres can enlarge the contact area between the active material and electrolyte so as to reduce the charge transfer resistance. When applied to the anode of lithium-ion battery, the material shows distinguished lithium storage performance and mechanical robustness, benefiting from the high capacity of Fe 2 O 3 and good stability of NiMoO 4 . Moreover, the voids on the surface of the material effectively buffer the volume effect during the repeated cycling. The specific capacity of the composite can reach 1063 mA h g À 1 and 584 mA h g À 1 after 460 and 420 cycles at 300 mA g À 1 and 2 A g À 1 , respectively. The improvement of the electrochemical performance is attributed to the unique structural characteristics and synergistic effect of its heterogeneous phases.

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A high-performance pseudocapacitive electrode material for supercapacitors based on the unique NiMoO4/NiO nanoflowers

Cited by 96 publications

References 54 publications

Porous spherical NiO@NiMoO4@PPy nanoarchitectures as advanced electrochemical pseudocapacitor materials

Porous spherical NiO@NiMoO4@PPy nanoarchitectures as advanced electrochemical pseudocapacitor materials

Building Ni₉S₈/MoS₂ Nanosheets Decorated NiMoO₄ Nanorods Heterostructure for Enhanced Water Splitting

Fe₂O₃/NiMoO₄ Heterostructured Microspheres as an Anode Material for Long‐Life and High‐Performance Lithium Storage

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A high-performance pseudocapacitive electrode material for supercapacitors based on the unique NiMoO4/NiO nanoflowers

Cited by 96 publications

References 54 publications

Porous spherical NiO@NiMoO4@PPy nanoarchitectures as advanced electrochemical pseudocapacitor materials

Porous spherical NiO@NiMoO4@PPy nanoarchitectures as advanced electrochemical pseudocapacitor materials

Building Ni9S8/MoS2 Nanosheets Decorated NiMoO4 Nanorods Heterostructure for Enhanced Water Splitting

Fe2O3/NiMoO4 Heterostructured Microspheres as an Anode Material for Long‐Life and High‐Performance Lithium Storage

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Building Ni₉S₈/MoS₂ Nanosheets Decorated NiMoO₄ Nanorods Heterostructure for Enhanced Water Splitting

Fe₂O₃/NiMoO₄ Heterostructured Microspheres as an Anode Material for Long‐Life and High‐Performance Lithium Storage