MoS2 nanosheets decorated with ultrafine Co3O4 nanoparticles for high-performance electrochemical capacitors

Liang, Dewei; Tian, Zhenfei; Li, Jun; Ye, Yixing; Wu, Shouliang; Cai, Yunyu; Liang, Changhao

doi:10.1016/j.electacta.2015.09.085

Cited by 60 publications

(22 citation statements)

References 40 publications

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“…Co 3 O 4 /Cu 2 S and Co 3 O 4 /Ag 2 S composites were fabricated for pseudocapacitor applications by all chemical routes synthesis approach for the first time and analyzed systematically using various material characterization tools. A comparison of these composites confirmed the high performance of the Co 3 O 4 /Cu 2 S composite electrode as a supercapacitor with a high areal capacitance of 5324 mF cm −2 , which was double that of Co 3 O 4 /Ag 2 S. The electrochemical cycling stability of champion electrode (Co 3 O 4 /Cu 2 S) is found to be 98.2 % after 2000 cycles which is superior than Co 3 O 4 /C@MoS 2 and MoS 2 ‐Co 3 O 4 reported elsewhere ,. This was attributed to the synergistic effect of the metal oxide and metal sulfides composite, where the Co 3 O 4 hexagonal sheet serves as the backbone for the decoration of Cu 2 S nanoparticles, which resulted in a highly conductive network assisting in the rapid charge‐transfer reactions and reducing the internal resistance of the electrode.…”

Section: Discussionsupporting

confidence: 63%

“…A comparison of these composites confirmed the high performance of the Co 3 O 4 /Cu 2 S composite electrode as a supercapacitor with a high areal capacitance of 5324 mF cm À 2 , which was double that of Co 3 O 4 / Ag 2 S. The electrochemical cycling stability of champion electrode (Co 3 O 4 /Cu 2 S) is found to be 98.2 % after 2000 cycles which is superior than Co 3 O 4 /C@MoS 2 and MoS 2 -Co 3 O 4 reported elsewhere. [26,27] This was attributed to the synergistic effect of the metal oxide and metal sulfides composite, where the Co 3 O 4 hexagonal sheet serves as the backbone for the decoration of Cu 2 S nanoparticles, which resulted in a highly conductive network assisting in the rapid charge-transfer reactions and reducing the internal resistance of the electrode. These results suggest that the Co 3 O 4 /Cu 2 S composite electrode is a new promising architecture for practical applications in energy conversion devices and such strategy can be adopted for different metal oxide/metal sulfide composites.…”

Section: Discussionmentioning

confidence: 99%

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Designing a Copper‐ and Silver‐Sulfide Composite with Co₃O₄ for High‐Performance Electrochemical Supercapacitors

2018

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Electronic devices have driven modern lifestyle demands for efficient and environmentally friendly energy storage appliances. This paper reports the simple design of an efficient, cost‐effective pseudocapacitor electrode based on copper sulfide (Cu2S) and silver sulfide (Ag2S) composites with cobalt oxide (Co3O4) for high‐performance energy storage devices. A simple one‐pot approach was used to synthesize hexagonal sheets of Co3O4 and a successive ionic layer adsorption and reaction method was exploited to coat these sheets with nanostructures of Cu2S and Ag2S. The resulting three‐dimensional (3D) Co3O4/Cu2S and Co3O4/Ag2S composite electrode contained a high loading of Cu2S and Ag2S nanoparticles (metal sulfides) on the hexagonal sheets of Co3O4 (metal oxide), which offers a highly conductive network assisting in rapid charge‐transfer reactions and reduces the internal resistance of the electrode. A symmetrical supercapacitor based on Co3O4/Cu2S//Co3O4/Cu2S showed a high areal capacitance of 1080 mF cm−2, which was significantly higher than that of the Co3O4/Ag2S//Co3O4/Ag2S symmetric supercapacitor (645 mF cm−2). These results show that the Co3O4/Cu2S composite heterostructure is a promising electrode architecture for high performance pseudocapacitors.

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Section: Discussionsupporting

confidence: 63%

Section: Discussionmentioning

confidence: 99%

Designing a Copper‐ and Silver‐Sulfide Composite with Co₃O₄ for High‐Performance Electrochemical Supercapacitors

2018

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“…q,r) The charge/discharge profile and cycling performance of Co 3 O 4 @MoS 2 composite Reproduced with permission. [174] Copyright 2015, American Chemistry Society. s) The scheme of MoS 2 @MPC preparation.…”

Section: Wwwadvancedsciencecommentioning

confidence: 99%

MoS₂‐Based Nanocomposites for Electrochemical Energy Storage

et al. 2016

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Typical layered transition‐metal chalcogenide materials, in particular layered molybdenum disulfide (MoS2) nanocomposites, have attracted increasing attention in recent years due to their excellent chemical and physical properties in various research fieldsHere, a general overview of synthetic MoS2 based nanocomposites via different preparation approaches and their applications in energy storage devices (Li‐ion battery, Na‐ion battery, and supercapacitor) is presented. The relationship between morphologies and the electrochemical performances of MoS2‐based nanocomposites in the three typical and promising rechargeable systems is also discussed. Finally, perspectives on major challenges and opportunities faced by MoS2‐based materials to address the practical problems of MoS2‐based materials are presented.

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“…6 Herein, we present a facile and green design to synthesize a Co-doped Ni(OH) 2 interconnected nanosheet network using a laser-induced cobalt colloid as a doping precursor, followed by an aging treatment in a nickel ion and sodium thiosulfate hybrid medium at room temperature (Scheme 1). In the experiment, laser ablation in liquid (LAL) is a powerful and green technique to generate new nanostructures and nanomaterials without using any stabilizer or surfactant [Scheme 1(a)], [23][24][25][26] and sodium thiosulfate here plays an important role in the reactions as an evocating agent and facilitates the mediation of the shape and specic surface area of the products. 27 To the best of our knowledge, this is the rst report of a Co-doped Ni(OH) 2 nanosheet network fabricated using the LAL technique for a supercapacitor application.…”

Section: Introductionmentioning

confidence: 99%

Co-doped Ni hydroxide and oxide nanosheet networks: laser-assisted synthesis, effective doping, and ultrahigh pseudocapacitor performance

Liang

et al. 2016

J. Mater. Chem. A

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Morphology control and impurity doping are two widely applied strategies to improve the electrochemical performance of nanomaterials. Herein, we report an environmentally friendly approach to obtain Co-doped Ni(OH) 2 nanosheet networks using a laser-induced cobalt colloid as a doping precursor followed by an aging treatment in a hybrid medium of nickel ions. The shape and specific surface area of the doped Ni(OH) 2 can be successfully adjusted by changing the concentration of sodium thiosulfate. Furthermore, a Co-doped Ni(OH) 2 nanosheet network was further converted into Co-doped NiO with its pristine morphology retained via facile thermal decomposition in air. The structure and electrochemical performance of the as-prepared samples are investigated with scanning and transmission electron microscopy, energy dispersive X-ray analysis, X-ray diffraction, Fourier transform infrared spectroscopy, the nitrogen adsorption-desorption isotherm technique, and electrochemical measurements. The Codoped Ni(OH) 2 electrode shows an ultrahigh specific capacitance of 1421 F g À1 at a current density of 6 A g À1 , and a good retention level of 76% after 1000 cycles, in sharp contrast with only a 47% retention level of the pure Ni(OH) 2 electrode at the same current density. In addition, the Co-doped NiO electrode exhibits a capacitance of 720 F g À1 at 6 A g À1 and 92% retention after 1000 cycles, which is also superior to the corresponding values of relevant pure NiO electrodes. The Co 2+ partially substitutes for Ni 2+ in the metal hydroxide and oxide, resulting in an increase of free holes in the valence band, and, therefore, enhancement of the p-type conductivity of Ni(OH) 2 and NiO. Moreover, such novel mesoporous nanosheet network structures are also able to enlarge the electrode-electrolyte contact area and shorten the path length for ion transport. The synergetic effect of these two results is responsible for the observed ultrahigh pseudocapacitor performance.

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MoS2 nanosheets decorated with ultrafine Co3O4 nanoparticles for high-performance electrochemical capacitors

Cited by 60 publications

References 40 publications

Designing a Copper‐ and Silver‐Sulfide Composite with Co₃O₄ for High‐Performance Electrochemical Supercapacitors

Designing a Copper‐ and Silver‐Sulfide Composite with Co₃O₄ for High‐Performance Electrochemical Supercapacitors

MoS₂‐Based Nanocomposites for Electrochemical Energy Storage

Co-doped Ni hydroxide and oxide nanosheet networks: laser-assisted synthesis, effective doping, and ultrahigh pseudocapacitor performance

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MoS2 nanosheets decorated with ultrafine Co3O4 nanoparticles for high-performance electrochemical capacitors

Cited by 60 publications

References 40 publications

Designing a Copper‐ and Silver‐Sulfide Composite with Co3O4 for High‐Performance Electrochemical Supercapacitors

Designing a Copper‐ and Silver‐Sulfide Composite with Co3O4 for High‐Performance Electrochemical Supercapacitors

MoS2‐Based Nanocomposites for Electrochemical Energy Storage

Co-doped Ni hydroxide and oxide nanosheet networks: laser-assisted synthesis, effective doping, and ultrahigh pseudocapacitor performance

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Product

Resources

About

Designing a Copper‐ and Silver‐Sulfide Composite with Co₃O₄ for High‐Performance Electrochemical Supercapacitors

Designing a Copper‐ and Silver‐Sulfide Composite with Co₃O₄ for High‐Performance Electrochemical Supercapacitors

MoS₂‐Based Nanocomposites for Electrochemical Energy Storage