Construction of NiCo2O4 nanosheet-decorated leaf-like Co3O4 nanoarrays from metal–organic framework for high-performance hybrid supercapacitors

Tao, Kai; Yang, Yujing; Yang, Chao; Ma, Qingxiang; Han, Lei

doi:10.1039/c9dt02907a

Cited by 74 publications

(41 citation statements)

References 47 publications

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“…Figure 6c shows the separation of capacitive and diffusion current contributions at a scan rate of 4 mV s −1 and Figure 6 d illustrates the respective charge storage contributions at various scan rates. At 1 mV s −1 , the capacitive contribution to the overall charge storage amounts to be 36.3 % indicating the battery type diffusion phenomena to be predominated, most commonly observed in such battery type materials [44,45] . Thereafter, with an increasing scan rate, the capacitive phenomena are predominated as the ions have less time to diffuse into the electrode material.…”

Section: Resultsmentioning

confidence: 97%

Cost‐Effective Synthesis of Electrodeposited NiCo₂O₄ Nanosheets with Induced Oxygen Vacancies: A Highly Efficient Electrode Material for Hybrid Supercapacitors

Pappu

Nanaji

Mandati

et al. 2020

Batteries & Supercaps

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Nanostructured transition metal oxide synthesis possessing high energy density and stability is desirable for supercapacitors. Herein, we synthesize three‐dimensional NiCo2O4 (NCO) nanosheets with oxygen vacancies induced by sustainable and environmentally benign electrodeposition assisted chemical reduction process. Oxygen vacancies increase the conductivity, adsorptivity, and the active surface area, thereby enhancing the charge storage capabilities. The binder‐free NCO delivers the highest specific capacitance (Csp) of 2065 F g−1 at 1 A g−1, retaining 89.30 % of its initial value at 10 A g−1 after 10,000 continuous charge‐discharge (CD) cycles. An asymmetric supercapacitor (ASC) fabricated shows remarkable electrochemical properties with high energy density (Emax) of 28.6 Wh kg−1 and power density (Pmax) of 7.5 kW kg−1. The assembled ASC reports exceptional cyclic retention of 90.6 % for 10,000 CD cycles with practical demonstration. The approach used herein is suitable for eco‐friendly supercapacitor electrode fabrication with large scale manufacturing capability and less capital investment.

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Section: Resultsmentioning

confidence: 97%

Cost‐Effective Synthesis of Electrodeposited NiCo₂O₄ Nanosheets with Induced Oxygen Vacancies: A Highly Efficient Electrode Material for Hybrid Supercapacitors

Pappu

Nanaji

Mandati

et al. 2020

Batteries & Supercaps

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“…In addition to the MnO 2 , some other metal oxides are also combined with NiCo 2 O 4 . For example, Tao et al [75] . prepared the NiCo 2 O 4 nanosheets‐decorated leaf‐like Co 3 O 4 nanoarrays on Ni foam current collector as a positive electrode for the HSCs.…”

Section: Roadmap To High‐energy‐density Hybrid Supercapacitorsmentioning

confidence: 99%

Nickel Cobaltite: A Positive Electrode Material for Hybrid Supercapacitors

et al. 2021

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The increased demand of energy due to the recent technological advances in diverse fields such as portable electronics and electric vehicles is often hindered by the poor capability of energy‐storage systems. Although supercapacitors (SCs) exhibit higher power density than state‐of‐the art batteries, their insufficient energy density remains a major challenge. An emerging concept of hybrid supercapacitors (HSCs) with the combination of one capacitive and one battery electrode in a single cell holds a great promise to deliver high energy density without sacrificing power density and cycling stability. This Minireview elaborates the recent advances of use of nickel cobaltite (NiCo2O4) as a potential positive electrode (battery‐like) for HSCs. A brief introduction on the structural benefits and charge storage mechanisms of NiCo2O4 was provided. It further shed a light on composites of NiCo2O4 with different materials like carbon, polymers, metal oxides, and others, which altogether helps in increasing the electrochemical performance of HSCs. Finally, the key scientific challenges and perspectives on building high‐performance HSCs for future‐generation applications were reviewed.

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“…Cyclic voltammetry (CV) and galvanostatic charge-discharge (GCD) measurements were performed in the operating potential range of 0-0.8 V. The specic capacitance (C s , C m ) is calculated by the following formulas ( 3) and ( 4) using GCD data. [30][31][32]…”

Section: Materials Characterizationmentioning

confidence: 99%

High mass loading flower-like MnO₂ on NiCo₂O₄ deposited graphene/nickel foam as high-performance electrodes for asymmetric supercapacitors

et al. 2021

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Construction of NiCo₂O₄ nanosheet-decorated leaf-like Co₃O₄ nanoarrays from metal–organic framework for high-performance hybrid supercapacitors

Abstract: Leaf-like Co3O4@NiCo2O4 nanoarrays with an excellent energy storage performance was designed by a MOF-guided strategy.

Cited by 74 publications

References 47 publications

Cost‐Effective Synthesis of Electrodeposited NiCo₂O₄ Nanosheets with Induced Oxygen Vacancies: A Highly Efficient Electrode Material for Hybrid Supercapacitors

Cost‐Effective Synthesis of Electrodeposited NiCo₂O₄ Nanosheets with Induced Oxygen Vacancies: A Highly Efficient Electrode Material for Hybrid Supercapacitors

Nickel Cobaltite: A Positive Electrode Material for Hybrid Supercapacitors

High mass loading flower-like MnO₂ on NiCo₂O₄ deposited graphene/nickel foam as high-performance electrodes for asymmetric supercapacitors

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Construction of NiCo2O4 nanosheet-decorated leaf-like Co3O4 nanoarrays from metal–organic framework for high-performance hybrid supercapacitors

Abstract: Leaf-like Co3O4@NiCo2O4 nanoarrays with an excellent energy storage performance was designed by a MOF-guided strategy.

Cited by 74 publications

References 47 publications

Cost‐Effective Synthesis of Electrodeposited NiCo2O4 Nanosheets with Induced Oxygen Vacancies: A Highly Efficient Electrode Material for Hybrid Supercapacitors

Cost‐Effective Synthesis of Electrodeposited NiCo2O4 Nanosheets with Induced Oxygen Vacancies: A Highly Efficient Electrode Material for Hybrid Supercapacitors

Nickel Cobaltite: A Positive Electrode Material for Hybrid Supercapacitors

High mass loading flower-like MnO2 on NiCo2O4 deposited graphene/nickel foam as high-performance electrodes for asymmetric supercapacitors

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Product

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Construction of NiCo₂O₄ nanosheet-decorated leaf-like Co₃O₄ nanoarrays from metal–organic framework for high-performance hybrid supercapacitors

Cost‐Effective Synthesis of Electrodeposited NiCo₂O₄ Nanosheets with Induced Oxygen Vacancies: A Highly Efficient Electrode Material for Hybrid Supercapacitors

Cost‐Effective Synthesis of Electrodeposited NiCo₂O₄ Nanosheets with Induced Oxygen Vacancies: A Highly Efficient Electrode Material for Hybrid Supercapacitors

High mass loading flower-like MnO₂ on NiCo₂O₄ deposited graphene/nickel foam as high-performance electrodes for asymmetric supercapacitors