Rational fabrication of nanosheet-dewy NiMoO4/Ni3S2 nanohybrid for efficient hybrid supercapacitor

Zhang, Lishu; Zheng, Dongliang; Pei, Shuaili; Ye, Lin; Geng, Shuai; Lian, Jianshe

doi:10.1016/j.jallcom.2018.12.308

Cited by 24 publications

(13 citation statements)

References 78 publications

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“…7a-e at various scanning rates between 0 and 0.6 V. All curves show a feature of redox peaks, suggesting a quasi-reversible Faradaic redox process caused by a redox between bivalent Ni and trivalent Ni ions, revealing a pseudocapacitive characteristic. The bivalent Ni ions from NiMoO 4 can gradually combine with OH À ions to form [Ni (OH) 3 ] À , and therefore the electrochemical reaction of NiO and NiO@NiMoO 4 can be expressed as [51,52]…”

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

confidence: 99%

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%

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

et al. 2020

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“…Various metal oxides such as CoMoO 4 [ 9 ], FeMoO 4 [ 10 ], NiCo 2 O 4 [ 11 ], MnMoO 4 [ 12 ], and NiMoO 4 [ 13 , 14 ] have all been used in supercapacitor electrodes. However, nickel molybdate (NiMoO 4 ) is considered an especially promising material for the electrode due to its high theoretical specific capacitance, battery-type behavior, low cost, and abundance [ 15 , 16 ]. To produce an electrode, active material such as NiMoO 4 /nanographite (NG) is coated on a current collector.…”

Section: Introductionmentioning

confidence: 99%

Treatment of NiMoO4/nanographite nanocomposite electrodes using flexible graphite substrate for aqueous hybrid supercapacitors

et al. 2021

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The cycling performance of supercapacitors sometimes becomes limited when electrode materials slough off during frequent charge–discharge cycles, due to weak bonding between the active material and the current collector. In this work, a flexible graphite foil substrate was successfully used as the current collector for supercapacitor electrodes. Graphite foil substrates were treated in different ways with different acid concentrations and temperatures before being coated with an active material (NiMoO4/nanographite). The electrode treated with HNO3 (65%) and H2SO4 (95%) in a 1:1 ratio at 24°C gave better electrochemical performance than did electrodes treated in other ways. This electrode had capacitances of 441 and 184 Fg–1 at current densities of 0.5 and 10 Ag-1, respectively, with a good rate capability over the current densities of the other treated electrodes. SEM observation of the electrodes revealed that NiMoO4 with a morphology of nanorods 100–120 nm long was properly accommodated on the graphite surface during the charge–discharge process. It also showed that treatment with high-concentration acid created an appropriately porous and rough surface on the graphite, enhancing the adhesion of NiMoO4/nanographite and boosting the electrochemical performance.

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“…A great deal of emerging conversion-type materials are considered to replace the intercalation-based common graphite, owing to an ∼2–11-fold increase of theoretical capacity. , Note that the conversion-type Co–Mo oxides are pretty favorable by virtue of versatile state variation and high theoretical capacity (∼980 mA h g –1 for CoMoO 4 and ∼793 mAh g –1 for CoMoO 3 ) . Also, many previous reports have shown that binary Co–Mo oxides can deliver an apparent promotion in the conductivity and electrochemical active sites in contrast to individual Co/Mo oxides, which make them apt to obtain high capacity performance in LIBs. − However, these conversion-type materials cannot maintain the capacity in the long-term cycling test, which greatly restrains their usage in the LIB field. In the final analysis, the insertion/desertion of Li + into/out will generate drastic volumetric change, and the electrode structure is subjected to fast collapse after several cycles. − To retain high capacity in the cycling test, delicate micro-/nanostructure design and structure protection are highly desirable.…”

Section: Introductionmentioning

confidence: 99%

Sulfur-Modified Carbon-Coated CoMoO₃ Nanohybrid Electrodes for Enhanced Lithium-Storage Capacity

Zhang

et al. 2020

ACS Appl. Nano Mater.

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Conversion-type binary cobalt−molybdenum oxides are rated as engineering lithium-ion battery (LIB) materials with high theoretical capacity. However, there exists an annoying issue regarding fast capacity fade because of the pulverization of the electrode induced by the intense volumetric expansion rate of these conversion-type materials. Reasonable micro/nanostructure design and structure protection are particularly important. In our work, a sulfur (S)-modified CoMoO 3 /C electrode was designed through carbonization of the CoMoO 4 −polydopamine precursor and later S modification. The carbon (C) layer can not only serve as a nice electroconductive network to stimulate the charge transfer but also serve as a rigid support to preserve the structural integrity. The facial S modification both generates numerous ultrathin MoS 2 nanosheets on the surface and provides plenty of electrolyte-accessible areas. Benefiting from the synergy of these components, such an S-modified CoMoO 3 /C electrode is employed as a high-efficiency LIB anode, featured with fairly high capacity (861.3 mAh g −1 at 0.1 A g −1 ). Besides, such an electrode brings us a prominent capacity increase in the cycling process and finally reaches a superb retention of 99.7% after 500 cycles. This work expounds that the capacity promotion is attributed to restructuring of microarchitecture and the formation of more active sites, which guide us to optimize structure via the C-coating and Smodification routes.

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Rational fabrication of nanosheet-dewy NiMoO4/Ni3S2 nanohybrid for efficient hybrid supercapacitor

Cited by 24 publications

References 78 publications

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

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

Treatment of NiMoO4/nanographite nanocomposite electrodes using flexible graphite substrate for aqueous hybrid supercapacitors

Sulfur-Modified Carbon-Coated CoMoO₃ Nanohybrid Electrodes for Enhanced Lithium-Storage Capacity

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Rational fabrication of nanosheet-dewy NiMoO4/Ni3S2 nanohybrid for efficient hybrid supercapacitor

Cited by 24 publications

References 78 publications

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

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

Treatment of NiMoO4/nanographite nanocomposite electrodes using flexible graphite substrate for aqueous hybrid supercapacitors

Sulfur-Modified Carbon-Coated CoMoO3 Nanohybrid Electrodes for Enhanced Lithium-Storage Capacity

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Sulfur-Modified Carbon-Coated CoMoO₃ Nanohybrid Electrodes for Enhanced Lithium-Storage Capacity