Applied potential-dependent performance of the nickel cobalt oxysulfide nanotube/nickel molybdenum oxide nanosheet core–shell structure in energy storage and oxygen evolution

Chiu, Kuan-Lin; Lin, Lu‐Yin

doi:10.1039/c8ta11471d

Cited by 68 publications

(18 citation statements)

References 86 publications

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“…3a) revealed binding energies of Co 2p 3/2 and Co 2p 1/2 centered at 780.8 and 796.7 eV with a binding-energy gap of 15.9 eV, as well as two satellite peaks at 785.3 and 803.1 eV. These characteristic peaks were assigned to Co 2+ , certifying the valid doping of cobalt atoms [29,[38][39][40]. In Fig.…”

Section: Resultsmentioning

confidence: 75%

Oxygen vacancies-rich cobalt-doped NiMoO4 nanosheets for high energy density and stable aqueous Ni-Zn battery

et al. 2020

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The enhancement of energy density and cycling stability is in urgent need for the widespread applications of aqueous rechargeable Ni-Zn batteries. Herein, a facile strategy has been employed to construct hierarchical Co-doped Ni-MoO 4 nanosheets as the cathode for high-performance Ni-Zn battery. Benefiting from the merits of substantially improved electrical conductivity and increased concentration of oxygen vacancies, the NiMoO 4 with 15% cobalt doping (denoted as CNMO-15) displays the best capacity of 361.4 mA h g −1 at a current density of 3 A g −1 and excellent cycle stability. Moreover, the assembled CNMO-15//Zn battery delivers a satisfactory specific capacity of 270.9 mA h g −1 at 2 A g −1 and a remarkable energy density of 474.1 W h kg −1 at 3.5 kW kg −1 , together with a maximum power density of 10.3 kW kg −1 achieved at 118.8 W h kg −1 . Noticeably, there is no capacity decay with a 119.8% retention observed after 5000 cycles, demonstrating its outstanding long lifespan. This work might provide valuable inspirations for the fabrication of high-performance Ni-Zn batteries with superior energy density and impressive stability.

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Section: Resultsmentioning

confidence: 75%

Oxygen vacancies-rich cobalt-doped NiMoO4 nanosheets for high energy density and stable aqueous Ni-Zn battery

et al. 2020

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“…Figure S2f displays the O 1s spectrum of the prepared sample. The main peak at 531.6 eV stems from the M−O−H bond, while the peak at 532.8 eV corresponds to the structural water in the prepared sample . As for the S 2p spectrum (Figure S2g), the main peak located at 161.5 eV corresponds to the S 2p 3/2 , indicating the existence of the S 2− ion in the prepared sample.…”

Section: Resultsmentioning

confidence: 92%

“…The main peak at 531.6 eV stems from the MÀ OÀ H bond, while the peak at 532.8 eV corresponds to the structural water in the prepared sample. [15,39] As for the S 2p spectrum ( Figure S2g), the main peak located at 161.5 eV corresponds to the S 2p 3/2 , indicating the existence of the S 2À ion in the prepared sample. The peak at 162.6 eV can be assigned to the S 2p 1/2 which is an evidence for the existing bond between the sulfur ions and metal ions.…”

Section: Nico 2 S 4 /Co X Ni 1-x (Oh) 2 Huhm Battery-like Cathode Matmentioning

confidence: 93%

Solid‐State Hybrid Supercapacitor Assembled from a Heterostructured Co−Ni Battery‐like Cathode and Supercapacitor‐Type Highly Disordered Carbon Nanosheets

et al. 2020

ChemElectroChem

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Hybrid at either the mechanism or the device level can lead to a hybridization effect of the kinetics and electrochemical characteristic of a supercapacitor (SC). Herein, a heterostructured NiCo 2 S 4 /Co x Ni 1-x (OH) 2 battery-like cathode material was designed, with which the obtained sample accomplished the combination of excellent electronic and ionic conductivity so as to realize an enhanced faradaic redox storage process. Besides, a SC-type highly capacitive anode material of a N and S codoped porous carbon nanosheets (ACNS) was also fabricated, which exhibits great advantages in terms of its enlarged specific surface area, the ease of introducing pseudocapacitive reactions, and its physical structure. These features directly lead to significant improvements in the electric double-layer capacitor (EDLC)-type electrochemical properties of the carbon anode. The combination of an EDLC-type carbon anode with the redox-reaction-type cathode in a full cell device could potentially lead to a charge storage process that simultaneously integrates the electrophysical and electrochemical processes. For these reasons, the obtained solid-state hybrid SC delivers a wide voltage window of 1.6 V, a high specific capacity of 121.3 C g À 1 , and enhanced energy/power densities of 26.1 Wh kg À 1 /11 kW kg À 1 . The as-assembled device can maintain a high and stable capacity retention of 89.1 % for over 10 000 cycles. The developed hybrid assembly strategy and the electrode combination may provide design guidelines for designing other high-energy hybrid SCs.

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“…), which can be directly grown on the 1D support via the hydrothermal/solvothermal approach. Sometimes, certain posttreatments to the precursors, such as annealing at high temperatures or chemical vapor deposition (CVD) processes, are also adopted to tune the final product for better properties . In general, these hydrothermal/solvothermal processes need expensive autoclaves, where it is difficult to conduct in situ monitoring as well, as autoclaves are used in sealed conditions.…”

Section: D‐2d Synergized Nanostructurementioning

confidence: 99%

“…Similarly, NiCo 2 S 4 nanotube arrays were also fabricated as the core, and then coupled with the evenly grown nickel molybdenum oxide (NiMoO 4 ) nanosheets on the outer surface of the nanotubes for the fabrication of a nanotube/nanosheet core/shell nanostructure. This battery‐type electrode with the core/shell nanostructure displayed a higher areal capacitance of 17.75 F cm −2 at 10 mA cm −2 , compared favorably to that of the NiCo 2 S 4 electrode tested under the same conditions . Moreover, the Ni 3 Se 2 /Ni(OH) 2 nanocomposite composed of the Ni(OH) 2 nanoflakes hydrothermally formed on the surfaces of the Ni 3 Se 2 nanowires was demonstrated as well.…”

Section: Applicationsmentioning

confidence: 99%

One‐dimensional and two‐dimensional synergized nanostructures for high‐performing energy storage and conversion

Wang

2019

InfoMat

248

142

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To address the worldwide energy challenges, advanced energy storage and conversion systems with high comprehensive performances, as the promising technologies, are inevitably required on a timely basis. The performance of these energy systems is intimately dependent on the properties of their electrodes. In addition to the electrode materials selection and their compositional optimization, materials fabrication with the designed nanostructure also provides significant benefits for their performances. In the past decade, considerable efforts have been made to promote the search for multidimensional nanostructures containing both onedimensional (1D) and two-dimensional (2D) nanostructures in synergy, namely, 1D-2D synergized nanostructures. By developing the freestanding electrodes with such unique nanoarchitectures, the structural features and electroactivities of each component can be manifested, where the synergistic properties among them can be simultaneously obtained for further enhanced properties, such as the increased number of active sites, fast electronic/ionic transport, and so forth. This review overviews the state-of-the-art on the 1D-2D synergized nanostructures, which can be broadly divided into three groups, namely, core/shell, cactus-like, and sandwich-like nanostructures. For each category, we introduce them from the aspects of structural features, fabrication methodologies to their successful applications in different types of energy storage/conversion devices, including rechargeable batteries, supercapacitors, water splitting, and so forth. Finally, the main challenges faced by and perspectives on the 1D-2D synergized nanostructures are discussed. K E Y W O R D S1D-2D synergized nanostructure, cactus-like nanostructure, core/shell nanostructure, energy storage/conversion, sandwich-like nanostructure

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Applied potential-dependent performance of the nickel cobalt oxysulfide nanotube/nickel molybdenum oxide nanosheet core–shell structure in energy storage and oxygen evolution

Abstract: This study proves the importance of trade-off for the electrochemically active surface area and the electrical conductivity for designing efficient nanomaterials applied on different electrochemical fields like energy storage and electrocatalysis.

Cited by 68 publications

References 86 publications

Oxygen vacancies-rich cobalt-doped NiMoO4 nanosheets for high energy density and stable aqueous Ni-Zn battery

Oxygen vacancies-rich cobalt-doped NiMoO4 nanosheets for high energy density and stable aqueous Ni-Zn battery

Solid‐State Hybrid Supercapacitor Assembled from a Heterostructured Co−Ni Battery‐like Cathode and Supercapacitor‐Type Highly Disordered Carbon Nanosheets

One‐dimensional and two‐dimensional synergized nanostructures for high‐performing energy storage and conversion

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