A general route to the synthesis of layer-by-layer structured metal organic framework/graphene oxide hybrid films for high-performance supercapacitor electrodes

Yu, Dongbo; Ge, Liang; Wei, Xiangfeng; Wu, Bin; Jin, Ronghua; Wang, Huanting; Xu, Tongwen

doi:10.1039/c7ta04074a

Cited by 55 publications

(21 citation statements)

References 51 publications

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“…The peak tail, which appears as a consequence of an undesirable oxygen evolution reaction-induced peak in the CV profiles when the voltage is broadened to 1.5 V or higher, indicates that the maximum working voltage of the ASC should be around 1.2 V. Such a phenomenon was explained in a similar way in the previous literatures [52,53,54]. For example, Xu et al reported that the optimized operating voltage range of the ZIF-LDH/GO//ZIF-C/G device was 0–1.6 V in order to avoid the oxygen evolution reaction at 1.6–1.8 V [55]. Elshahawy et al reported that 1.6 V was utilized to be the upper limit of the operating voltage since, when the voltage went above 1.7 V, the oxygen evolution started [56].…”

Section: Resultssupporting

confidence: 55%

Homogeneous Core/Shell NiMoO4@NiMoO4 and Activated Carbon for High Performance Asymmetric Supercapacitor

Dong

Hui

et al. 2019

Nanomaterials

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Here, we report the extraordinary electrochemical energy storage capability of NiMoO4@NiMoO4 homogeneous hierarchical nanosheet-on-nanowire arrays (SOWAs), synthesized on nickel substrate by a two-stage hydrothermal process. Comparatively speaking, the SOWAs electrode displays superior electrochemical performances over the pure NiMoO4 nanowire arrays. Such improvements can be ascribed to the characteristic homogeneous hierarchical structure, which not only effectively increases the active surface areas for fast charge transfer, but also reduces the electrode resistance significantly by eliminating the potential barrier at the nanowire/nanosheet junction, an issue usually seen in other reported heterogeneous architectures. We further evaluate the performances of the SOWAs by constructing an asymmetric hybrid supercapacitor (ASC) with the SOWAs and activated carbon (AC). The optimized ASC shows excellent electrochemical performances with 47.2 Wh/kg in energy density of 1.38 kW/kg at 0–1.2 V. Moreover, the specific capacity retention can be as high as 91.4% after 4000 cycles, illustrating the remarkable cycling stability of the NiMoO4@NiMoO4//AC ASC device. Our results show that this unique NiMoO4@NiMoO4 SOWA has great prospects for future energy storage applications.

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Section: Resultssupporting

confidence: 55%

Homogeneous Core/Shell NiMoO4@NiMoO4 and Activated Carbon for High Performance Asymmetric Supercapacitor

Dong

Hui

et al. 2019

Nanomaterials

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“…4 For instance, Yu and co-workers have synthesised layer-by-layer structured metal organic framework/graphene oxide hybrid lms via a facile route. 5 Supercapacitors based on this hybrid exhibit high energy and power densities. In addition, a graphene/carbon nanotube (CNT)/Co 3 O 4 ternary composite has been synthesised by Zhao et al 6 The ternary composite based supercapacitor exhibits a specic capacitance of 77 F g À1 at a scan rate of 500 mV s À1 .…”

Section: Introductionmentioning

confidence: 99%

A general method for boosting the supercapacitor performance of graphitic carbon nitride/graphene hybrids

Lin

Amaiem

et al. 2017

J. Mater. Chem. A

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“…The transformation of these MOF-5-derived structures actually results from a diffusion-controlled exchange process 28 . In terms of our previous studies, Hmim solution could induce a weakly acidic environment (Hmim ⇌ (1-x)H + + (1-x)mim − + xHmim), which breaks ionic bonds such as Co-OH and Zn-OH 32,33 . Accordingly, one can reason that the weaker Zn-O tetrahedral coordination of MOF-5 would be deteriorated once exposed to such an environment, and Zn 2+ nodes are in an unsaturated state (Step I in Fig.…”

Section: Continuous Exchangementioning

confidence: 80%

A solvent-assisted ligand exchange approach enables metal-organic frameworks with diverse and complex architectures

et al. 2020

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Unlike inorganic crystals, metal-organic frameworks do not have a well-developed nanostructure library, and establishing their appropriately diverse and complex architectures remains a major challenge. Here, we demonstrate a general route to control metal-organic framework structure by a solvent-assisted ligand exchange approach. Thirteen different types of metal-organic framework structures have been prepared successfully. To demonstrate a proof of concept application, we used the obtained metal-organic framework materials as precursors for synthesizing nanoporous carbons and investigated their electrochemical Na + storage properties. Due to the unique architecture, the one-dimensional nanoporous carbon derived from double-shelled ZnCo bimetallic zeolitic imidazolate framework nanotubes exhibits high specific capacity as well as superior rate capability and cycling stability. Our study offers an avenue for the controllable preparation of well-designed meta-organic framework structures and their derivatives, which would further broaden the application opportunities of metal-organic framework materials.

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A general route to the synthesis of layer-by-layer structured metal organic framework/graphene oxide hybrid films for high-performance supercapacitor electrodes

Abstract: A promising strategy is demonstrated for the syntheses of metal organic framework/graphene oxide hybrid films with highly ordered layer-by-layer architecture, and the derived hybrids exhibit remarkable energy storage performances.

Cited by 55 publications

References 51 publications

Homogeneous Core/Shell NiMoO4@NiMoO4 and Activated Carbon for High Performance Asymmetric Supercapacitor

Homogeneous Core/Shell NiMoO4@NiMoO4 and Activated Carbon for High Performance Asymmetric Supercapacitor

A general method for boosting the supercapacitor performance of graphitic carbon nitride/graphene hybrids

A solvent-assisted ligand exchange approach enables metal-organic frameworks with diverse and complex architectures

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