Recent progress in metal–organic framework/graphene-derived materials for energy storage and conversion: design, preparation, and application

Wang, Kaixi; Hui, Kwun Nam; Hui, Kwan San; Peng, Shaojun; Xu, Yuxi

doi:10.1039/d1sc00095k

Cited by 95 publications

(50 citation statements)

References 256 publications

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“…The most interesting fact about MOF-based materials is that it is easy tune their properties just by changing their organic linker and keeping metal site constant, and consequently the possibility of enhancing their electrocatalytic performance. 90–93 Their exceptional morphological, chemical and structural properties make them promising candidates not only for electrocatalytic application, but also environmental protection, sensors, catalysis, etc. However, it should be noted that most pristine MOFs still suffer from the intrinsic drawbacks of poor structural stability and low electrical conductivity, which hamper their practical applications, particularly in the field of electrochemical energy storage and conversion.…”

Section: Metal Organic Framework/graphene Compositesmentioning

confidence: 99%

Graphene-based materials as electrocatalysts for the oxygen evolution reaction: a review

Jung

Karmakar

Adhikari³

et al. 2022

Sustainable Energy Fuels

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Section: Metal Organic Framework/graphene Compositesmentioning

confidence: 99%

Graphene-based materials as electrocatalysts for the oxygen evolution reaction: a review

Jung

Karmakar

Adhikari³

et al. 2022

Sustainable Energy Fuels

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“…Over the past years, hybrid metal–organic frameworks (MOFs) have flourished as electrode materials for next-generation electrochemical energy storage devices. − Thanks to their superior functionality, unique morphology, design flexibility, and structural integrity, MOFs are capable of fitting into the required parameters for an efficient electrode material. At the material level, high gravimetric energy could be achieved thanks to the hybrid nature, allowing the charge storage from both metal cations and organic ligands, whereas cycling stability and facile ion transport are inherent to the polymer-like robust network and the porous structure, respectively.…”

Section: Introductionmentioning

confidence: 99%

An Electrically Conducting Li-Ion Metal–Organic Framework

et al. 2021

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Metal–organic frameworks (MOFs) have emerged as an important, yet highly challenging class of electrochemical energy storage materials. The chemical principles for electroactive MOFs remain, however, poorly explored because precise chemical and structural control is mandatory. For instance, no anionic MOF with a lithium cation reservoir and reversible redox (like a conventional Li-ion cathode) has been synthesized to date. Herein, we report on electrically conducting Li-ion MOF cathodes with the generic formula Li2-M-DOBDC (wherein M = Mg2+ or Mn2+; DOBDC4– = 2,5-dioxido-1,4-benzenedicarboxylate), by rational control of the ligand to transition metal stoichiometry and secondary building unit (SBU) topology in the archetypal CPO-27. The accurate chemical and structural changes not only enable reversible redox but also induce a million-fold electrical conductivity increase by virtue of efficient electronic self-exchange facilitated by mix-in redox: 10–7 S/cm for Li2-Mn-DOBDC vs 10–13 S/cm for the isoreticular H2-Mn-DOBDC and Li2-Mg-DOBDC, or the Mn-CPO-27 compositional analogues. This particular SBU topology also considerably augments the redox potential of the DOBDC4– linker (from 2.4 V up to 3.2 V, vs Li+/Li0), a highly practical feature for Li-ion battery assembly and energy evaluation. As a particular cathode material, Li2-Mn-DOBDC displays an average discharge potential of 3.2 V vs Li+/Li0, demonstrates excellent capacity retention over 100 cycles, while also handling fast cycling rates, inherent to the intrinsic electronic conductivity. The Li2-M-DOBDC material validates the concept of reversible redox activity and electronic conductivity in MOFs by accommodating the ligand’s noncoordinating redox center through composition and SBU design.

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“…Therefore, anchoring the MOF particles on the graphene hydrogels/aerogels can serve as a good strategy to impart stability to the MOFs, enhance electrical conductivity because of the π-conjugated characteristic of graphene, and also incorporate pseudocapacitance in the composite arising from the redox active ligands or metal centers. Introduction of MOFs in between graphene sheets also helps in prevention of restacking of sheets as a result of aggregation or π–π interactions …”

Section: Introductionmentioning

confidence: 99%

“…Introduction of MOFs in between graphene sheets also helps in prevention of restacking of sheets as a result of aggregation or π−π interactions. 52 Herein, considering the above-mentioned issues, composites of graphene−MOF aerogels (GMAs) have been prepared and used as supercapacitor electrode materials with high mass loading. rGO (reduced graphene oxide) acted as the source of the electrical double layer formation, and a cobalt-containing MOF, CPO-27 or Co-MOF-74, provided the pseudocapacitance arising from its redox active ligand consisting of hydroquinone units.…”

Section: ■ Introductionmentioning

confidence: 99%

Understanding Integrated Graphene–MOF Nanostructures as Binder- and Additive-Free High-Performance Supercapacitors at Commercial Scale Mass Loading

Barua

Mehra

Paul

2021

ACS Appl. Energy Mater.

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Supercapacitors are energy storage devices that can deliver rapid power but have found limited application due to their inferior capacitive performance at a higher mass loading required for commercial application. Herein we have synthesized a graphene–MOF aerogel (GMA) from a chemical synthesis route between graphene and a metal–organic framework (MOF) which has been demonstrated as an efficient binder and additive-free electrode material for supercapacitor applications with gradual increments in mass loading. The integration of the high conductivity, mechanical strength, and chemical stability of graphene along with the excellent pseudocapacitive nature of the MOF led to the superlative performance of the composite as a high-mass-loading supercapacitor. Remarkably, even after a 233% increase in mass loading from 3 mg cm–2 to 10 mg cm–2, only a 23% reduction in specific capacitance was observed. At the lowest mass loading, specific capacitance was calculated to be 98 F g–1 for the full cell, whereas at the highest mass loading, it was found to be 75 F g–1. Additionally, the material exhibited 100% stability after 25 000 cycles. Electrochemical impedance spectroscopy revealed that equivalent series resistance and resistance for ion adsorption were lowered due to excellent electrical conductivity of the material (1.15 Sm–1). Notably, the integrated nature of the material made double-layer charging and charge transfer at the interface rapid, while pseudocapacitive charging representing electron transfer inside the nanomaterial was also efficient due to hydrogen bonded network between the MOF and graphene. The composite showed a high energy density of 10.4 Wh kg–1 at the highest mass loading without the presence of any dead components. This energy density value was higher than that observed for comparable materials even at a lower mass loading.

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Recent progress in metal–organic framework/graphene-derived materials for energy storage and conversion: design, preparation, and application

Abstract: This review summarizes comprehensively the latest methods of synthesizing MOFs/graphene and their derivatives, and their application in energy storage and conversion with a detailed analysis of the structure–property relationship.

Cited by 95 publications

References 256 publications

Graphene-based materials as electrocatalysts for the oxygen evolution reaction: a review

Graphene-based materials as electrocatalysts for the oxygen evolution reaction: a review

An Electrically Conducting Li-Ion Metal–Organic Framework

Understanding Integrated Graphene–MOF Nanostructures as Binder- and Additive-Free High-Performance Supercapacitors at Commercial Scale Mass Loading

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