Design of Mo-doped cobalt sulfide hollow nanocages from zeolitic imidazolate frameworks as advanced electrodes for supercapacitors

Yang, Zheng; Ma, Qingxiang; Han, Lei; Tao, Kai

doi:10.1039/c9qi00663j

Cited by 56 publications

(15 citation statements)

References 33 publications

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“…The O−Co 3 S 4 /CP electrode also shows the higher capacitance retention of around 65 % than 43 % of Co 3 S 4 /CP at 10 A g −1 . The electrochemical performance of O−Co 3 S 4 /CP is competitive in comparison with those of other cobalt sulfide electrodes reported in previous literatures (Table S1) [15,33–41] . The electrochemical impedance spectroscopy (EIS) was employed to understand the electrical resistance and charge‐transport behavior of Co 3 S 4 /CP and O−Co 3 S 4 /CP electrodes.…”

Section: Resultsmentioning

confidence: 95%

Design of Oxygen‐doped Co₃S₄ Hollow Nanosheets by Suppressed Sulfurization for Supercapacitors

et al. 2021

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Cobalt sulfides can be considered as auspicious electrode materials for supercapacitors due to the good electrical conductivity and high reversible redox capability. In this study, the O‐doped Co3S4 hollow nanosheets supported on carbon paper (O−Co3S4/CP) are facilely prepared through a suppressed sulfurization method by using CP‐supported Co‐ZIF as the precursor and methanol as the solvent. The hollow nanosheets not only offer fast transport pathways but also provide abundant redox active sites. Furthermore, theoretical calculations indicate that the O doping can enhance the adsorption ability of OH− on O−Co3S4 with electrochemical activity and electrical conductivity improvement. Owing to the advantages of the appropriate composition and unique structure, the as‐made hollow structure O−Co3S4/CP shows a remarkable specific capacitance of 755 F g−1 at a current density of 1 A g−1, while a good rate performance of 65 % capacitance retention at 10 A g−1 can be reached. Moreover, the asymmetric supercapacitors assembled by O−Co3S4/CP and activated carbon electrodes yield an energy density of 21.3 Wh kg−1 with power density of 0.75 kW kg−1. The present work can offer a useful guidance for the exploitation of O doped cobalt sulfides hollow nanosheets for supercapacitors.

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Section: Resultsmentioning

confidence: 95%

Design of Oxygen‐doped Co₃S₄ Hollow Nanosheets by Suppressed Sulfurization for Supercapacitors

et al. 2021

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“…Thirdly, the interconnect nanosheet arrays on NF provide a stable structure and shorten the diffusion path of ions and electrons. Finally, Co element is responsible for providing high capacity and Mo element is responsible for improving the stability of the electrode [31,32].…”

Section: Electrochemical Performancementioning

confidence: 99%

Electrodeposited molybdenum-doped Co3O4 nanosheet arrays for high-performance and stable hybrid supercapacitors

Shen

Yang

Song

et al. 2021

J Solid State Electrochem

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Long-cycle stability and high-energy density are big challenges for developing high-performance hybrid supercapacitor (HSC) electrode materials. In this work, molybdenum-doped Co 3 O 4 nanosheets arrays on nickel foam (noted as Mo x Co 1.5−x O/ NF) are successfully prepared via facile one-step electrodeposition followed by annealing for hybrid supercapacitors. The experimental and calculated results indicate that the band gap modification and conductivity enhancement of Mo x Co 1.5−x O lead to excellent capacitive performance due to the doping of Mo into Co 3 O 4 . The as-prepared Mo 0.25 Co 1.25 /NF electrode demonstrates a high specific capacity of 128.2 mAh g −1 (923 F g −1 ) at 1 A g −1 (60% higher than the undoped Co 3 O 4 ) and superior cycle stability with 95.2% capacity retention after 10,000 cycles at 10 A g −1 . The assembled HSC delivers highenergy density of 64.3 Wh kg −1 at the power density of 794.1 W kg −1 and with 87.7% capacity retention after 10,000 cycles. This work can present a new strategy to fabricate the three-dimensional high-performance integrated electrode materials by a facile electrodeposition for heteroatom-doped transition metal oxide for high-performance supercapacitors.

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“…Upon comparing the proposed HSC performance with those of previously reported metal-oxide/metal-sulfide HSC structures, it was observed that the energy densities were comparable without any reduction of power density. Notably, the energy density of the HSC is comparable to or superior than those of the CoS//AC cells (5.3 W h kg −1 at 1800 W kg −1 ), 47 59 CoS/graphene//AC HSC (29 W h kg −1 at 800 W kg −1 ), 60 CoS/Co 9 S 8 //AC HSC (46.2 W h kg −1 at 550 W kg −1 ), 61 Mn-doped CoS//AC HSC (27.7 W h kg −1 at 799.9 W kg −1 ), 38 and CoS on S/N-doped graphene foam// graphene foam HSC (33.2 W h kg −1 at 374.7 W kg −1 ). 62 The advantages of the porous structure and the effective pseudocapacitive nature of the defect-enriched Co oxysulfide with C interface infuse higher current sweeps with the electrochemical reduction sites.…”

Section: Coos 2 + Ohmentioning

confidence: 99%

Metal‐organic framework‐derived carbon‐cobalt oxysulfide nanocage heterostructure electrode for efficient hybrid supercapacitors

Ranjith

Raju

Kwak

et al. 2020

Intl J of Energy Research

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Construction of hybrid supercapacitors (HSCs) with defect engineered electrodes derived from single metal-organic frameworks (zeolitic imidazolate frameworks, ZIF-67) via control of the thermal influences showed unique structural features and rich electrochemical properties. Designing the three-dimensional Co oxysulfide nanograins with carbon frame (CoOS-C)-based positive electrode surfaces through sulfidation with tunable defect states along with N-and S-doping states improved the electrical energy storage; further, the possibility of having a carbon-based skeleton surface influenced the effective rate capability during the charge-discharge process. This unique nanostructural feature with encapsulation of porous N-and S-doped graphitic carbon enabled improved rate performance by enhancing the stability of the electrode material and shortening the iondiffusion paths by the synergistic effect. Owing to the tunable defect functionality, the CoOS-C based electrode exhibited a high storage capacity of 708.8 C g −1 at 1 A g −1 and an excellent rate capability with long-term cyclic stability, with more than 93% capacity retention after 3000 cycles. Furthermore, the fabricated HSCs operated within a wide potential window of 1 to 1.6 V, which allowed excellent rate capability with a high-energy density of 31.7 W h kg −1 at a specific power density of 800 W kg −1 with long-term cyclic stability up to 10 000 cycles.

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Design of Mo-doped cobalt sulfide hollow nanocages from zeolitic imidazolate frameworks as advanced electrodes for supercapacitors

Abstract: A Mo-doped CoS HNC with enhanced electrochemical performance was designed by using ZIF-67 as a self-sacrificial template through a dissolution–regrowth process in the presence of NaMoO4 with an additional sulfurization process.

Cited by 56 publications

References 33 publications

Design of Oxygen‐doped Co₃S₄ Hollow Nanosheets by Suppressed Sulfurization for Supercapacitors

Design of Oxygen‐doped Co₃S₄ Hollow Nanosheets by Suppressed Sulfurization for Supercapacitors

Electrodeposited molybdenum-doped Co3O4 nanosheet arrays for high-performance and stable hybrid supercapacitors

Metal‐organic framework‐derived carbon‐cobalt oxysulfide nanocage heterostructure electrode for efficient hybrid supercapacitors

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Design of Mo-doped cobalt sulfide hollow nanocages from zeolitic imidazolate frameworks as advanced electrodes for supercapacitors

Abstract: A Mo-doped CoS HNC with enhanced electrochemical performance was designed by using ZIF-67 as a self-sacrificial template through a dissolution–regrowth process in the presence of NaMoO4 with an additional sulfurization process.

Cited by 56 publications

References 33 publications

Design of Oxygen‐doped Co3S4 Hollow Nanosheets by Suppressed Sulfurization for Supercapacitors

Design of Oxygen‐doped Co3S4 Hollow Nanosheets by Suppressed Sulfurization for Supercapacitors

Electrodeposited molybdenum-doped Co3O4 nanosheet arrays for high-performance and stable hybrid supercapacitors

Metal‐organic framework‐derived carbon‐cobalt oxysulfide nanocage heterostructure electrode for efficient hybrid supercapacitors

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Design of Oxygen‐doped Co₃S₄ Hollow Nanosheets by Suppressed Sulfurization for Supercapacitors

Design of Oxygen‐doped Co₃S₄ Hollow Nanosheets by Suppressed Sulfurization for Supercapacitors