Synthesis of Ni(OH)2 nanoflakes on ZnO nanowires by pulse electrodeposition for high-performance supercapacitors

Lo, I-Hsiang; Wang, Junyi; Huang, Kuo‐Yen; Huang, Jinhua; Kang, W.P.

doi:10.1016/j.jpowsour.2016.01.041

Cited by 74 publications

(29 citation statements)

References 39 publications

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“…After that, the electrochemical deposition process was performed in a three-electrode system using the Ni(NO 3 ) 2 ·6H 2 O aqueous solution as electrolyte. The OH − generated by electrolytic reaction at the Ag electrode surface causes constant Ni(OH) 2 deposited, and thus hierarchical Ag@Ni(OH) 2 nanospheres are formed as described by the following equations [19]: (XPS) measurement was performed on an ESCALAB 250Xi (ThermoFisher Scientific Co., Ltd, USA) with Al Kα as the X-ray source.…”

Section: Resultsmentioning

confidence: 99%

Hierarchical Core/Shell Structured Ag@Ni(OH)2 Nanospheres as Binder-Free Electrodes for High Performance Supercapacitors

Chu

Yang

et al. 2019

Crystals

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Hierarchical Ag@Ni(OH)2 nanospheres were achieved directly on copper foam substrate through a convenient two-step process. Ag nanoflowers were formed on copper substrate by galvanic replacement technology between AgNO3 and copper foam followed by electrodeposition of a layer of Ni(OH)2. Ag nanostructures as cores not only dominated the final morphology of the composites, but also improved the electrical conductivity, increased the specific surface area of the active electrode material, and even directly participated in the electrochemical reactions. The resulted Ag@Ni(OH)2 nanospheres could be directly used as high-performance binder-free electrodes and exhibited enhanced electrochemical performance with a high specific capacitance of 1.864 F cm−2 and long cycling lifespans of 90.43% capacity retaining after 3000 cycles.

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Section: Resultsmentioning

confidence: 99%

Hierarchical Core/Shell Structured Ag@Ni(OH)2 Nanospheres as Binder-Free Electrodes for High Performance Supercapacitors

Chu

Yang

et al. 2019

Crystals

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“…For electrocatalysis, the 1D morphology promotes the gas bubbles evolving and releasing from the catalyst surface, enhancing the electrolyte contact with the catalyst . Therefore, through a proper core/shell combination, synergistic properties are produced, leading to large and simultaneous enhancement of the overall performance …”

Section: D‐2d Synergized Nanostructurementioning

confidence: 99%

“…For example, Ma et al have electrodeposited CoO branch nanoflakes on conductive Co nanowire core to form a hierarchical porous Co/CoO core/shell 1D‐2D synergized structure. Besides, by a similar process, Lo et al have fabricated high‐performing SC electrodes, based on the Ni(OH) 2 nanoflakes modified on the ZnO nanowires; Shi et al obtained a self‐standing molybdenum carbide (Mo 2 C)/MnO 2 nanocomposite, in which ultrathin MnO 2 nanosheets were uniformly wrapped on highly conductive Mo 2 C nanofibers (Mo 2 C NFs) to form a cross‐linked network. Nevertheless, electrodeposition requires the use of highly conducting substrates, and it can be difficult to scale‐up.…”

Section: D‐2d Synergized Nanostructurementioning

confidence: 99%

“…1D‐nanostructured oxides, sulfides, selenides, and carbides as the core materials have also been reported widely . For instance, MnO 2 , Co 3 O 4 , ZnO, TiO 2 , and other oxides nanowire arrays were applied as scaffolds to build up the core/shell nanostructures. For sulfides, among the examples was the unique ZnCo sulfides nanotube arrays with rough surface acting as a scaffold and favorable for electrodeposition of ultrathin Ni(OH) 2 nanoflakes.…”

Section: Applicationsmentioning

confidence: 99%

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

Wang

2019

InfoMat

233

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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“…Zeng et al synthesized a unique nuclear ZnO@C@NiCo 2 O 4 nanosheet array on a carbon substrate using a simple hydrothermal and electrodeposition method. Due to the introduction of carbon from metal‐organic framework and core–shell structure, the hybrid electrode exhibits significantly enhanced electrochemical performance compared to ZnO@NiCo 2 O 4 nanorods, and also 3D ZnO@MnO 2 core–shell nanotubes, ZnO/Ni(OH) 2 , ZnO@MnCo 2 O 4 . The use of the substrate on the load of ZnO as a core design gives us a great inspiration.…”

Section: Introductionmentioning

confidence: 99%

High Energy Density Asymmetric Supercapacitor Based ZnS/NiCo₂S₄/Co₉S₈ Nanotube Composites Materials

Sui

Zhang

et al. 2018

Adv Materials Inter

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a high level of technology. However, the demand for new energy had broken the position of traditional energy in social development. [1][2][3][4][5] In the early stage of the development of new energy, rechargeable batteries were considered to be electric vehicles (EV) as efficient power equipment for sustainable energy storage devices. However, the charge storage of the current charge of the rechargeable battery (for example, Ni-MH battery and nonaqueous lithium ion battery) was mainly dependent on the structure of the intercalated electrode material of the intercalation/crystallization cation (H + or Li + ), and thus controlled cation. The diffusion within the crystal frame limited the charge/discharge rate (or power density). [6] However, the anode material properties, synthesis, and theoretical capacity determined the lithium battery technology. [7] Supercapacitors, also known as electrochemical capacitors, are highly charged due to their high power density, excellent rate capability, fast charge/discharge, long cycle life, fast propulsion of charge propagation, and low maintenance costs, triggering great industry and academia attention. Promote the growing use of consumer portable devices, electrical/hybrid electric vehicles, and other equipment. [8,9] Supercapacitors mainly include two categories: one is based on the surface of the capacitor material adsorption and desorption of the electric double layer capacitor, such as carbon nanotubes, [10] active carbon, [11] graphene; [12][13][14] the other is based on the surface and the internal redox reaction of the pseudocapacitor, such as metal oxides, [15] sulfides, [16] hydroxides, [17] which have a common goal: to prepare a variety of nanomorphology of the material or multiphase material composite, in order to improve the performance of the material electrode. [18][19][20][21] Metal sulfide have attracted excessive attention as electrode materials due to its excellent performance. In order to achieve excellent performance of the electrode materials, many research regulate the shape of materials or synthesize other composite materials. one of the representative material is NiCo 2 S 4 , which have much lower optical band gap energy and much higher electric conductivity than that of corresponding metal oxide NiCo 2 O 4 . Additionally, NiCo 2 S 4 , as a binary metal sulfide, are able to provide more redox reaction than a single metal sulfide. [22] Wang and co-workers [23] first synthesized NiCo 2 S 4 @Fe 2 O 3 nanoneedle array anode with a larger specific capacitance (342 F g −1 , at 5 mV s −1 ) and MnO 2 nanosheet array cathode operating in a wide potential window for high energy Flexible energy storage devices are leading to many researches owing to the huge development prospects, especially the energy storage materials. Recently, ZnS/NiCo 2 S 4 /Co 9 S 8 nanotube (ZNCN) is synthesized by adding rod-like ZnO during hydrothermal process, differing from previous reports. The capacitance of ZNCN electrode is 1618.1 F g −1 at the current density of 1 A g −1 in 2 m K...

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Synthesis of Ni(OH)2 nanoflakes on ZnO nanowires by pulse electrodeposition for high-performance supercapacitors

Cited by 74 publications

References 39 publications

Hierarchical Core/Shell Structured Ag@Ni(OH)2 Nanospheres as Binder-Free Electrodes for High Performance Supercapacitors

Hierarchical Core/Shell Structured Ag@Ni(OH)2 Nanospheres as Binder-Free Electrodes for High Performance Supercapacitors

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

High Energy Density Asymmetric Supercapacitor Based ZnS/NiCo₂S₄/Co₉S₈ Nanotube Composites Materials

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Synthesis of Ni(OH)2 nanoflakes on ZnO nanowires by pulse electrodeposition for high-performance supercapacitors

Cited by 74 publications

References 39 publications

Hierarchical Core/Shell Structured Ag@Ni(OH)2 Nanospheres as Binder-Free Electrodes for High Performance Supercapacitors

Hierarchical Core/Shell Structured Ag@Ni(OH)2 Nanospheres as Binder-Free Electrodes for High Performance Supercapacitors

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

High Energy Density Asymmetric Supercapacitor Based ZnS/NiCo2S4/Co9S8 Nanotube Composites Materials

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High Energy Density Asymmetric Supercapacitor Based ZnS/NiCo₂S₄/Co₉S₈ Nanotube Composites Materials