Nanocomposites of zeolitic imidazolate frameworks on graphene oxide for pseudocapacitor applications

Zhang, Wei; Tan, Yueyue; Gao, Yanfang; Wu, Jianxiang; Hu, Jinbo; Stein, Andreas; Tang, Bohejin

doi:10.1007/s10800-016-0921-9

Cited by 70 publications

(30 citation statements)

References 45 publications

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“…In addition, the charge/discharge curves show nonlinear which also indicate pseudocapacitive behavior due to redox reactions at the electrode‐electrolyte interface. Studies of pseudocapacitance materials have discussed that both of the CV curves at positive/negative sweeps and galvanostatic charge/discharge curves are asymmetrical, contributing the Faradic current due to the polarization and ohmic resistance …”

Section: Resultsmentioning

confidence: 99%

Zinc Sulfide Decorated on Nitrogen‐Doped Carbon Derived from Metal‐Organic Framework Composites for Highly Reversible Lithium‐Ion Battery Anode

et al. 2019

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On account of its low cost, non‐toxicity and high theoretical capacity, ZnS has been considered as one of the most potential anode materials for the following generation lithium‐ion batteries. However, the shortcomings that ZnS shows, such as low conductivity and large volume changes, make its wide application difficult. Herein, we combined ZnS with metal‐organic framework material (ZIF‐8) to form a carbon layer on the surface of nitrogen‐doped zinc sulfide, and obtained a new material ZnS@NC with a specific surface area of 191 m2 g−1. The results show that the reversible specific capacity of the composite is 853 mAh g−1 when the current is 500 mAg−1, which is caused by the increase of specific capacity with nitrogen doping and the effective adjustment of the volume of the carbon layer coated on the periphery of the ZnS particles during charging and discharging process. Promisingly, the performance of ZnS@NC composite is far superior to that of the bare ZnS.

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Section: Resultsmentioning

confidence: 99%

Zinc Sulfide Decorated on Nitrogen‐Doped Carbon Derived from Metal‐Organic Framework Composites for Highly Reversible Lithium‐Ion Battery Anode

et al. 2019

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“…It was recently reported that surface functional groups of ZIF‐8, when properly wired through a carbon support, are capable to undergo electron transfer reactions . These reactions can be detected as voltammetric peaks (or pseudocapacitive responses), and highlight the possible use of these materials as electrochemical capacitors.…”

Section: Resultsmentioning

confidence: 99%

“…More precisely, a first well‐defined reversible couple of oxidation/reduction peaks is detected at 0.5 V. Besides, a second more anodic process with a broader and poorly‐defined oxidation peak is observed at 0.7 V, as well as its respective better‐defined reduction peak at 0.57 V. These peaks reveal the existence of electron‐transfer reactions that involve at least two types of surface sites of ZIF‐8. A similar voltammetric behavior of carbon‐supported ZIF‐8 was reported by B. Tang and co‐workers and they assigned these pseudocapacitive processes to the OH uptake by Zn(N 2 C 4 H 6 ) 2 surface sites . On the other hand, the CV of UV‐treated C/mZIF‐8 electrode measured in identical conditions only shows the capacitive response of carbon, and no pseudocapacitive processes can be detected.…”

Section: Resultsmentioning

confidence: 99%

“…It was recently reported that surface functional groups of ZIF-8, when properly wired through a carbon support, are capable to undergo electron transfer reactions. [38,39] These reactions can be detected as voltammetric peaks (or pseudocapacitive responses), and highlight the possible use of these materials as electrochemical capacitors. In this context, the ZIF-8 and mZIF-8 crystals were dispersed over a carbon matrix and supported as a Nafion-bounded three-dimensional electrode on glassy carbon.…”

Section: Voltammetric Behaviormentioning

confidence: 99%

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Post‐Synthetic Modification of ZIF‐8 Crystals and Films through UV Light Photoirradiation: Impact on the Physicochemical Behavior of the MOF

et al. 2019

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The physicochemical modification of Metal‐Organic Frameworks (MOFs) is a current challenge in the search to improve their performance in different technological applications. In this work we analyze the post‐synthetic modification of ZIF‐8 crystals and films through a simple and clean treatment that involves the exposure to a UV lamp under environmental conditions. It is demonstrated that a short treatment alters the MOF structure and chemistry, providing a modified ZIF‐8 due to partial disconnections of its structure which increase the amount of terminal surface species such as Zn−OH and −C=N‐H, but without compromising the overall MOF structure, specific surface area or thermal stability. Additionally, it leads to changes in several properties of the ZIF‐8, such as its capacity to accumulate charge through pseudocapacitive processes, its interaction with nitric oxide and its light absorption behavior. This strategy of modifying ZIF‐8 without the use of chemicals through a gentle disconnection of its own structure could open new perspectives of post‐functionalization of crystals and films of ZIF‐8 to be used in a wide range of applications.

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“…6 a-c). As highlighted in the figure, the cathodic and anodic peaks shift to higher and lower potential regions, respectively with an increasing sweep rate due to the enhanced electric polarization and irreversible reactions [35]. These variations in the specific capacitance of the samples at different scan rates are listed in Table.2.…”

Section: Accepted Manuscriptmentioning

confidence: 90%

Phase-dependent electrochemistry of TiO2 nanocrystals for supercapacitor applications

Prasannalakshmi

Shanmugam

Kannadasan³

2016

Journal of Electroanalytical Chemistry

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Nanocomposites of zeolitic imidazolate frameworks on graphene oxide for pseudocapacitor applications

Cited by 70 publications

References 45 publications

Zinc Sulfide Decorated on Nitrogen‐Doped Carbon Derived from Metal‐Organic Framework Composites for Highly Reversible Lithium‐Ion Battery Anode

Zinc Sulfide Decorated on Nitrogen‐Doped Carbon Derived from Metal‐Organic Framework Composites for Highly Reversible Lithium‐Ion Battery Anode

Post‐Synthetic Modification of ZIF‐8 Crystals and Films through UV Light Photoirradiation: Impact on the Physicochemical Behavior of the MOF

Phase-dependent electrochemistry of TiO2 nanocrystals for supercapacitor applications

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