Optimized NiCo<sub>2</sub>O<sub>4</sub>/rGO hybrid nanostructures on carbon fiber as an electrode for asymmetric supercapacitors

Jiang, Hui; Yang, Kang; Ye, Pingwei; Huang, Qiang; Wang, Lingyun; Li, Sumin

doi:10.1039/c8ra07477a

Cited by 37 publications

(12 citation statements)

References 34 publications

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“…F, Nyquist spectrum of ASC (inset: enlarged plot at high frequency region) materials (Table 1). [64][65][66][67][68][69][70][71] The cyclic stability of the ASC device was investigated for 10 000 cycles at 10 A g À1 , as shown in Figure 8C. About 89.42% of capacitance retention is observed for 10 000 charge-discharge cycles, implying their excellent robustness of prepared electrode material and ASC device.…”

Section: Supercapacitorsmentioning

confidence: 97%

Hierarchical NiCo / NiO / NiCo ₂ O ₄ composite formation by solvothermal reaction as a potential electrode material for hydrogen evolutions and asymmetric supercapacitors

et al. 2021

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Electrochemical energy storage and conversion mechanisms are highly viable routes in the current scenario, and hence supercapacitor and electrolysis of water splitting have gained significant attention in recent times. Thus, transition metal nickel cobalt oxides are widely inspected as promising electrode materials for electrocatalysis and supercapacitors. However, the pure NiCo 2 O 4 was highly hindered by its widespread uses due to low electronic conductivity and deficient active edges. This study is aimed to fabricate the NiCo/NiO/NiCo 2 O 4 composite using a solvothermal process with different ratios of solvents. The inherent NiCo/NiO/NiCo 2 O 4 composite holds plentiful active edges and improved electrical conductivity than the pure. Interestingly, the electrocatalytic results revealed that the NiCo/NiO/NiCo 2 O 4 (NC) composite prepared by a solvent ratio of (dou-

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Section: Supercapacitorsmentioning

confidence: 97%

Hierarchical NiCo / NiO / NiCo ₂ O ₄ composite formation by solvothermal reaction as a potential electrode material for hydrogen evolutions and asymmetric supercapacitors

et al. 2021

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“…In Fig. 1(c), it was perceived that the characteristic diffraction peak of rGO around 2θ = 26° was suppressed which might be due to disordered structure and poor intensity of diffraction [32,34]. In the XRD pattern of NiCo 2 O 4 /S,N-rGO depicted in Fig.…”

Section: Structural and Functional Group Analysismentioning

confidence: 94%

NiCo₂O₄ nanoparticles inlaid on sulphur and nitrogen doped and co-doped rGO sheets as efficient electrocatalysts for the oxygen evolution and methanol oxidation reactions

2021

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“…In addition, the EIS curves of NiCo 2 O 4 /HCNFs composites are almost unchanged after long cycling, indicating good cycling stability (as illustrated in Figure e) . Notably, the NiCo 2 O 4 /HCNFs prepared in this work after 5000 long cycles has almost the largest specific capacitance retention among the reported NiCo 2 O 4 /CNFs-based electrode materials after 5000 long cycles ,,− (Figure f).…”

Section: Resultsmentioning

confidence: 66%

NiCo₂O₄ Nanosheets on Hollow Carbon Nanofibers for Flexible Solid-State Supercapacitors

Liu

Raza

et al. 2022

ACS Appl. Nano Mater.

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The carbon nanofiber-based all-solid-state supercapacitors hold great promise in powering portable electronics, while the low specific capacitance and intrinsic fragility have hindered their practical application. Here, flexible N-doped hollow carbon nanofibers (HCNFs) were prepared using poly-(acrylonitrile-co-acrylamide) as a precursor by the coaxial electrospinning method. The leaf-like NiCo 2 O 4 nanosheets are located on the inner and outer walls of the carbon layer via a simple solvothermal method to construct 3D freestanding NiCo 2 O 4 / HCNFs electrodes for a flexible all-solid-state supercapacitor. The hollow structure of HCNFs provides both inner and outer surfaces for NiCo 2 O 4 nanosheets and shortens the distance of ion transportation. NiCo 2 O 4 /HCNFs possesses an enhanced specific capacitance of 1864.0 F g −1 at 1 A g −1 and a good capacitance retention capability of 91.7% after 5000 times cycling, which is one of the best reported cycling stabilities to date. The symmetrical all-solid-state supercapacitors (ASSCs) were directly prepared with NiCo 2 O 4 /HCNFs as an electrode without adding any conductive agents and binders, which have good flexibility and a maximum energy density of 44.3 W h kg −1 at a specific power of 814.8 W kg −1 . Five series-connected ASSCs assembled by NiCo 2 O 4 /HCNFs can lighten a "DHU" logo composed of 36 lightemitting diodes, indicating their potential application prospect in wearable and portable devices.

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Optimized NiCo₂O₄/rGO hybrid nanostructures on carbon fiber as an electrode for asymmetric supercapacitors

Abstract: The NiCo2O4 nanowires and rGO hybrid nanostructure was constructed on carbon fibers (NiCo2O4/rGO/CF) via a hydrothermal method.

Cited by 37 publications

References 34 publications

Hierarchical NiCo / NiO / NiCo ₂ O ₄ composite formation by solvothermal reaction as a potential electrode material for hydrogen evolutions and asymmetric supercapacitors

Hierarchical NiCo / NiO / NiCo ₂ O ₄ composite formation by solvothermal reaction as a potential electrode material for hydrogen evolutions and asymmetric supercapacitors

NiCo₂O₄ nanoparticles inlaid on sulphur and nitrogen doped and co-doped rGO sheets as efficient electrocatalysts for the oxygen evolution and methanol oxidation reactions

NiCo₂O₄ Nanosheets on Hollow Carbon Nanofibers for Flexible Solid-State Supercapacitors

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Optimized NiCo2O4/rGO hybrid nanostructures on carbon fiber as an electrode for asymmetric supercapacitors

Abstract: The NiCo2O4 nanowires and rGO hybrid nanostructure was constructed on carbon fibers (NiCo2O4/rGO/CF) via a hydrothermal method.

Cited by 37 publications

References 34 publications

Hierarchical NiCo / NiO / NiCo 2 O 4 composite formation by solvothermal reaction as a potential electrode material for hydrogen evolutions and asymmetric supercapacitors

Hierarchical NiCo / NiO / NiCo 2 O 4 composite formation by solvothermal reaction as a potential electrode material for hydrogen evolutions and asymmetric supercapacitors

NiCo2O4 nanoparticles inlaid on sulphur and nitrogen doped and co-doped rGO sheets as efficient electrocatalysts for the oxygen evolution and methanol oxidation reactions

NiCo2O4 Nanosheets on Hollow Carbon Nanofibers for Flexible Solid-State Supercapacitors

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Optimized NiCo₂O₄/rGO hybrid nanostructures on carbon fiber as an electrode for asymmetric supercapacitors

Hierarchical NiCo / NiO / NiCo ₂ O ₄ composite formation by solvothermal reaction as a potential electrode material for hydrogen evolutions and asymmetric supercapacitors

Hierarchical NiCo / NiO / NiCo ₂ O ₄ composite formation by solvothermal reaction as a potential electrode material for hydrogen evolutions and asymmetric supercapacitors

NiCo₂O₄ nanoparticles inlaid on sulphur and nitrogen doped and co-doped rGO sheets as efficient electrocatalysts for the oxygen evolution and methanol oxidation reactions

NiCo₂O₄ Nanosheets on Hollow Carbon Nanofibers for Flexible Solid-State Supercapacitors