Hierarchical NiO Microflowers for High Performance Supercapacitors

Wang, X. J.; Xia, Xuhui; Meng, Weijia; Yang, Chang‐Fa; Guo, Meiqing; Zhao, Yu; Yang, Fuqian

doi:10.1007/s11664-018-6574-1

Cited by 5 publications

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“…For example, Wang et al. prepared hierarchical NiO microflowers grown on the surface of copper foams by hydrothermal process, and NiO‐microstructures exhibited excellent specific capacitance (3435.5 F⋅g −1 at the current density of 0.5 A⋅cm −2 ) and remarkable cycling stability; Li et al. synthesized Co 3 O 4 @CeO 2 nanocomposite with network structure by hydrothermal process, and the nanocomposite stood on Ni foam indicated excellent electrochemical properties; Jia et al.…”

Section: Introductionmentioning

confidence: 99%

3D Hierarchical structure Electrodes of MnO₂ Nanosheets Decorated on Needle‐like NiCo₂O₄ Nanocones on Ni Foam as a cathode material for Asymmetric Supercapacitors

et al. 2019

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In this work, three dimensional (3D) hierarchical structure electrode of MnO2 nanosheets decorated on needle‐like NiCo2O4 nanocones hybrid arrays on Ni foam is designed by a two‐step hydrothermal process. In this special structure, 3D hierarchical NiCo2O4/MnO2 core/shell composites have high specific surface area and large pore structure, which makes it easier to reach the active site, and shorten the ion transport path. Used as electrode for supercapacitors, the composites can develop their respective strengths, and the synergies between different components can also improve capacitance and speed capacity. The electrochemical results exhibit that the NiCo2O4/MnO2 core/shell electrodes display a large capacitance of 816 F⋅g−1 at the current density of 5 mA⋅cm−2, and show an excellent cycling stability (81% retention after 5000 cycles). Four Asymmetric supercapacitors (NiCo2O4/MnO2//BPC (banana peel), NiCo2O4/MnO2//BHC (buckwheat husk), NiCo2O4/MnO2//PPC (pomelo peel), and NiCo2O4/MnO2//AC (activated carbon)) using the NiCo2O4/MnO2 core/shell as a positive electrode and biochar as a negative electrode are assembled. The results indicate that all the asymmetric supercapacitors deliver a high operation voltage of 1.6 V, and NiCo2O4/MnO2//BPC exhibits excellent specific capacitance (85.4 F⋅g−1 at the current density of 5 mA⋅cm−2), high energy density (30.4 Wh⋅kg−1 at the power density of 133.5 W⋅kg−1) and remarkable cycling stability (only decrease by 12% after 5000 cycles).

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Section: Introductionmentioning

confidence: 99%

3D Hierarchical structure Electrodes of MnO₂ Nanosheets Decorated on Needle‐like NiCo₂O₄ Nanocones on Ni Foam as a cathode material for Asymmetric Supercapacitors

et al. 2019

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Efficient NiO/RGO combination for high-cycling-stability supercapacitors by an alkaline hydrothermal strategy

et al. 2022

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Synthesis of novel Co3O4 nanocubes-NiO octahedral hybrids for electrochemical energy storage supercapacitors

Reddy

Mandal

et al. 2021

Journal of Environmental Management

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Hierarchical NiO Microflowers for High Performance Supercapacitors

Cited by 5 publications

References 2 publications

3D Hierarchical structure Electrodes of MnO₂ Nanosheets Decorated on Needle‐like NiCo₂O₄ Nanocones on Ni Foam as a cathode material for Asymmetric Supercapacitors

3D Hierarchical structure Electrodes of MnO₂ Nanosheets Decorated on Needle‐like NiCo₂O₄ Nanocones on Ni Foam as a cathode material for Asymmetric Supercapacitors

Efficient NiO/RGO combination for high-cycling-stability supercapacitors by an alkaline hydrothermal strategy

Synthesis of novel Co3O4 nanocubes-NiO octahedral hybrids for electrochemical energy storage supercapacitors

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Hierarchical NiO Microflowers for High Performance Supercapacitors

Cited by 5 publications

References 2 publications

3D Hierarchical structure Electrodes of MnO2 Nanosheets Decorated on Needle‐like NiCo2O4 Nanocones on Ni Foam as a cathode material for Asymmetric Supercapacitors

3D Hierarchical structure Electrodes of MnO2 Nanosheets Decorated on Needle‐like NiCo2O4 Nanocones on Ni Foam as a cathode material for Asymmetric Supercapacitors

Efficient NiO/RGO combination for high-cycling-stability supercapacitors by an alkaline hydrothermal strategy

Synthesis of novel Co3O4 nanocubes-NiO octahedral hybrids for electrochemical energy storage supercapacitors

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3D Hierarchical structure Electrodes of MnO₂ Nanosheets Decorated on Needle‐like NiCo₂O₄ Nanocones on Ni Foam as a cathode material for Asymmetric Supercapacitors

3D Hierarchical structure Electrodes of MnO₂ Nanosheets Decorated on Needle‐like NiCo₂O₄ Nanocones on Ni Foam as a cathode material for Asymmetric Supercapacitors