A novel flexible wire-shaped supercapacitor with enhanced electrochemical performance based on hierarchical Co(OH)2@Ni(OH)2 decorated porous dendritic Ni film/Ni wire

Sharifi, Atefeh; Arvand, Majid; Daneshvar, Samaneh

doi:10.1016/j.jallcom.2020.158101

Cited by 25 publications

(15 citation statements)

References 75 publications

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“…The obtained initial equivalent resistance of the Ni 10 /NCO/RGO electrode is lower than the initial resistances obtained for NiCo 2 O4 and NiCo 2 O 4 /MnO 2 hierarchical nanostructure electrodes in our previous research work [60]. Moreover, the initial equivalent resistance of the Ni 10 /NCO/RGO electrode is comparable with that of 3D-nickel cobalt-layered double hydroxide onto the 3D-nickel wire (NiCo LDH/3D-Ni) and the Co(OH) 2 @Ni(OH) 2 /3D-Ni/NW electrode reported by Kang et al [61] and Sharifi et al [62], respectively. The initial resistance of the Ni 10 /NCO/RGO electrode is much smaller than the Ni/NCO electrode (Figure S9), which shows the importance of RGO in lowering the resistance of RGO.…”

Section: The Electrochemical Characteristics Of Ni/nco/rgo Wire Electsupporting

confidence: 67%

NiCo2O4/RGO Hybrid Nanostructures on Surface-Modified Ni Core for Flexible Wire-Shaped Supercapacitor

Shewale

Yun

2021

Nanomaterials

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In this work, we report surface-modified nickel (Ni) wire/NiCo2O4/reduced graphene oxide (Ni/NCO/RGO) electrodes fabricated by a combination of facile solvothermal and hydrothermal deposition methods for wire-shaped supercapacitor application. The effect of Ni wire etching on the microstructural, surface morphological and electrochemical properties of Ni/NCO/RGO electrodes was investigated in detail. On account of the improved hybrid nanostructure and the synergistic effect between spinel-NiCo2O4 hollow microspheres and RGO nanoflakes, the electrode obtained from Ni wire etched for 10 min, i.e., Ni10/NCO/RGO exhibits the lowest initial equivalent resistance (1.68 Ω), and displays a good rate capability with a volumetric capacitance (2.64 F/cm3) and areal capacitance (25.3 mF/cm2). Additionally, the volumetric specific capacitance calculated by considering only active material volume was found to be as high as 253 F/cm3. It is revealed that the diffusion-controlled process related to faradaic volume processes (battery type) contributed significantly to the surface-controlled process of the Ni10/NCO/RGO electrode compared to other electrodes that led to the optimum electrochemical performance. Furthermore, the wire-shaped supercapacitor (WSC) was fabricated by assembling two optimum electrodes in-twisted structure with gel electrolyte and the device exhibited 10 μWh/cm3 (54 mWh/kg) energy density and 4.95 mW/cm3 (27 W/kg) power density at 200 μA. Finally, the repeatability, flexibility, and scalability of WSCs were successfully demonstrated at various device lengths and bending angles.

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Section: The Electrochemical Characteristics Of Ni/nco/rgo Wire Electsupporting

confidence: 67%

NiCo2O4/RGO Hybrid Nanostructures on Surface-Modified Ni Core for Flexible Wire-Shaped Supercapacitor

Shewale

Yun

2021

Nanomaterials

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“…The performance characteristics of the MnNiCo-CH NNAs@CNT electrode are superior to the other recently reported NiCo-based electrodes (Table S1). − …”

Section: Results and Discussionmentioning

confidence: 99%

One-Step Braiding of Flexible Coaxial Asymmetric Fibrous Supercapacitors

et al. 2022

ACS Appl. Energy Mater.

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Fibrous energy storage devices, especially coaxial fibrous supercapacitors (FSCs), have extensive promising applications in new-generation wearable electronics. Nevertheless, few studies have been conducted concerning simultaneously achieving a high electrochemical performance, mechanical robustness, and convenient and efficient fabrication of coaxial FSCs. Here, a coaxial asymmetric FSC (CAFSC) prepared by a one-step braiding method is reported. Our high-speed braiding machine simultaneously combines and braids pre-prepared anodes, separator yarns, and cathodes of the CAFSC at high production rates. The CAFSC realizes a high energy density of 17.25−46.33 μW h cm −2 at a power density of 1.75−9.66 mW cm −2 while maintaining outstanding mechanical properties (90.1% capacitance retention after 1500 bending cycles and ability to lift a weight of 200 g) and a long cycling life (91.6% capacitance retention after 10,000 cycles), outperforming most of the reported FSCs. The flexible watchband weaved with two serially connected CAFSCs can power a commercial digital watch. This work presents a universal strategy to prepare high-performance CAFSCs for next-generation wearable electronics.

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“…With the development of modern society, it is urgent to exploit sustainable energy storage devices that can alleviate the energy crisis and environmental pollution issues . As a new energy device, supercapacitors (SCs) have attracted enormous scientific interest thanks to their ultrahigh power density, fast charge–discharge rate, and long cyclability .…”

Section: Introductionmentioning

confidence: 99%

CuCo₂O₄/NiCo-Metal–Organic Framework Nanoflake Arrays for High-Performance Supercapacitors

Zhou

Zhang

et al. 2022

ACS Appl. Nano Mater.

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Developing hybrid metal−organic frameworks (MOFs) with ordered structure is significant to obtain promising electrode materials for supercapacitors. Herein, the special electrodes of CuCo 2 O 4 /NiCo-MOF nanoflake vertical arrays are constructed on Ni foam by using the CuCo 2 O 4 nanorods as a selfsacrifice template. Because of the multidirectional interconnected channels of spinel CuCo 2 O 4 , great electrochemical activity of NiCo-MOF, well-arranged morphology, and synergy effect at the interface, the resulting CuCo 2 O 4 /NiCo-MOF nanoflakes exhibit remarkable specific capacity (12.81 F/cm 2 or 1423 F/g at 2 mA/ cm 2 ) and excellent rate performance (remaining 79.2% at 30 mA/ cm 2 ). The asymmetric supercapacitor assembled by CuCo 2 O 4 / NiCo-MOF and an activated carbon electrode shows excellent energy density of 0.48 mWh/cm 2 at a power density of 1.50 mW/cm 2 . This work inspires insight into exploiting hybrid MOFs with highly aligned arrays for energy storage.

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A novel flexible wire-shaped supercapacitor with enhanced electrochemical performance based on hierarchical Co(OH)2@Ni(OH)2 decorated porous dendritic Ni film/Ni wire

Cited by 25 publications

References 75 publications

NiCo2O4/RGO Hybrid Nanostructures on Surface-Modified Ni Core for Flexible Wire-Shaped Supercapacitor

NiCo2O4/RGO Hybrid Nanostructures on Surface-Modified Ni Core for Flexible Wire-Shaped Supercapacitor

One-Step Braiding of Flexible Coaxial Asymmetric Fibrous Supercapacitors

CuCo₂O₄/NiCo-Metal–Organic Framework Nanoflake Arrays for High-Performance Supercapacitors

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A novel flexible wire-shaped supercapacitor with enhanced electrochemical performance based on hierarchical Co(OH)2@Ni(OH)2 decorated porous dendritic Ni film/Ni wire

Cited by 25 publications

References 75 publications

NiCo2O4/RGO Hybrid Nanostructures on Surface-Modified Ni Core for Flexible Wire-Shaped Supercapacitor

NiCo2O4/RGO Hybrid Nanostructures on Surface-Modified Ni Core for Flexible Wire-Shaped Supercapacitor

One-Step Braiding of Flexible Coaxial Asymmetric Fibrous Supercapacitors

CuCo2O4/NiCo-Metal–Organic Framework Nanoflake Arrays for High-Performance Supercapacitors

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CuCo₂O₄/NiCo-Metal–Organic Framework Nanoflake Arrays for High-Performance Supercapacitors