MOF–derived hollow double–shelled NiO nanospheres for high–performance supercapacitors

Wu, Mingyi; Chen, Chen; Zhou, Jiao–Jiao; Yi, Fei‐Yan; Tao, Kai; Han, Lei

doi:10.1016/j.jallcom.2017.10.171

Cited by 164 publications

(48 citation statements)

References 50 publications

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“…This ingenious two step calcination treatment prevent the growth of iron oxide nanoparticles due to the existence of carbon species during the first step, as well as provide more pore inside the spindle‐like Fe 2 O 3 due to the removal of carbon materials during the second step, which can act as buffer space for volume changes during Li + insertion/extraction processes, thus delivering a high reversible capacity of 772 mAh g −1 at 0.2 C after 50 cycles. This simple calcination method can be also applied to synthesis of other metal oxides, such as cobalt oxides, zinc oxides, nickel oxides, manganese oxides, copper oxides, titanium oxide, and so on.…”

Section: Single Mof Derivativesmentioning

confidence: 99%

Rational Microstructure Design on Metal–Organic Framework Composites for Better Electrochemical Performances: Design Principle, Synthetic Strategy, and Promotion Mechanism

et al. 2020

Small Methods

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Metal–organic frameworks (MOFs) simultaneously containing metal ions and organic ligands have recently shown great potential for application in energy storage and conversion fields due to their controllable conversion into carbon materials or various metal species, which often exhibit superior electrochemical performance as electrode materials for energy storage and conversion. Nevertheless, the electrochemical energy storage performance of MOF derivatives can still be further enhanced through building composites with other functional materials. It is of great significance in developing new strategies of fabricating MOF composites to achieve electrode materials with improved charge transfer and electrochemical redox reaction kinetics. In this review, the novel design and strategies of MOF composites with various functional components are focused on, including carbon‐based materials (carbon nanotubes, graphene, etc.), metal oxides, 3D conductive substrates, polymeric materials, and the second MOFs and metal salts, especially their derivatives for energy storage and conversion fields. The key factors for controllable synthesis of various MOF composites and electrochemical performance enhancement mechanisms are discussed in detail. It is expected that this review will provide new inspiration for the development of MOF derivatives for energy storage and conversion.

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Section: Single Mof Derivativesmentioning

confidence: 99%

Rational Microstructure Design on Metal–Organic Framework Composites for Better Electrochemical Performances: Design Principle, Synthetic Strategy, and Promotion Mechanism

et al. 2020

Small Methods

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“…(E) Specific capacitance of N400, N500, and N600 at various current densities. F, Electrochemical impedance spectroscopy curves of N400, N500, and N600 at room temperature in 3.0 M KOH solution [Colour figure can be viewed at wileyonlinelibrary.com]…”

Section: Performance Optimization Of Mof‐derived Nanostructure Metal mentioning

confidence: 99%

A review of performance optimization of MOF-derived metal oxide as electrode materials for supercapacitors

et al. 2018

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Summary Metal‐organic frameworks (MOFs), as new class of porous materials, are constructed by inorganic metal centers and bridging organic links. Recently, MOFs have been proved to be effective templates for preparing metal oxides with large surface areas and controlled shape by directly annealing in air. There are lots of reports about metal‐organic framework‐derived metal oxides as electrode materials for supercapacitors. Metal‐organic framework‐derived metal oxides can offer higher capacitances compared with that prepared by other synthetic methods, likely attribute to high surface areas and optimal pore sizes. However, at present, the specific capacitances of MOF‐derived metal oxides received are far lower than theoretical values, and the cycle numbers could not meet practical demands. Accordingly, much effort has been made to improve the performance by further modifying MOFs. Thus, this paper focused on the advances in performance optimization of MOF‐derived metal oxide as electrode materials for supercapacitors as follows: Dual metal MOF‐derived binary metal oxides. Metal oxides with 2 metal cations possess better electrical conductivity and richer redox active sites than single metal oxides. Metal‐organic framework‐derived carbon/metal oxide composites (MO@C) or graphene/MOF‐derived graphene/metal oxide composites. Doping carbon not only facilitate transportation of electrodes but also contribution to extra double‐layer capacitance. Hybrid MOF‐derived metal oxide composites (MO@MO). Metal oxide composites can produce some synergistic effects that the individuals cannot provide. Metal‐organic framework‐derived metal oxides with a hollow structure. The Hollow structure could shorten ion diffusion distance and adapt to volume expansion generated during the ion intercalated/extracted process.

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“…However, the electrical conductivity of LDH and MOF is usually very poor . It′s found that the oxidation derivatives have satisfactory electrochemical behavior, such as, NiO derived from Ni−MOF and MnCo 2 O 4 @Co 3 O 4 derived from MnCo‐LDH@ZIF‐67 . Since sulfur ions are less electronegative than oxygen ions, they provide a more flexible structure with better cyclic stability and rate performance .…”

Section: Introductionmentioning

confidence: 99%

Sulfidation of Hierarchical NiAl−LDH/Ni−MOF Composite for High‐Performance Supercapacitor

Zheng¹,

Sun²,

Xu³

et al. 2019

ChemElectroChem

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Designing nanocomposites with good electrochemical properties is the key to studying electrode materials for supercapacitors. In this paper, we report a well‐defined composite (NiAl‐LDH/Ni−MOF/S) prepared in three steps. After the synthesis of LDH nanoplates through a hydrothermal method, the MOF nanosheets were grown on its surface by in situ nucleation. In this procedure, the synergistic effect of MOF and LDH will improve the specific capacitance. Afterwards, the composite was subjected to a sulfidation treatment to enhance its electrical conductivity. Consequently, the NiAl‐LDH/Ni−MOF/S has an excellent specific capacitance (1670 F g−1 at 1 A g−1) and rate capability (65 % from 1 to 30 A g−1). Moreover, an asymmetric supercapacitor (ASC) was assembled with NiAl‐LDH/Ni−MOF/S as cathode and activated carbon as anode. The ASC displays a maximum energy density (35.4 Wh kg−1) and outstanding cycle stability (retention of 96.4 % after 10000 cycles at 10 A g−1), demonstrating the potential of the electrode for use in high‐efficiency electrochemical capacitors.

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MOF–derived hollow double–shelled NiO nanospheres for high–performance supercapacitors

Cited by 164 publications

References 50 publications

Rational Microstructure Design on Metal–Organic Framework Composites for Better Electrochemical Performances: Design Principle, Synthetic Strategy, and Promotion Mechanism

Rational Microstructure Design on Metal–Organic Framework Composites for Better Electrochemical Performances: Design Principle, Synthetic Strategy, and Promotion Mechanism

A review of performance optimization of MOF-derived metal oxide as electrode materials for supercapacitors

Sulfidation of Hierarchical NiAl−LDH/Ni−MOF Composite for High‐Performance Supercapacitor

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