Core–shell assembly of carbon nanofibers and a 2D conductive metal–organic framework as a flexible free-standing membrane for high-performance supercapacitors

Zhao, Shihang; Wu, Huihui; Li, Yanli; Li, Qin; Zhou, Jiao–Jiao; Yu, Xianbo; Chen, Hongmei; Tao, Kai; Han, Lei

doi:10.1039/c9qi00390h

Cited by 77 publications

(49 citation statements)

References 40 publications

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“…Hybridizing MOFs with carbon materials is another useful strategy to improve the charge transfer characteristic and conductivity. [40,67,81] Due to the porous nature of carbon materials, these composites maintain suitable pore size distribution to bridge discrete MOFs particles for facilitating the charge transfer. At the same time of maintaining/amplifying other mechanical, thermal, and chemical properties, electrical properties of the composites have been greatly improved.…”

Section: Mofs Hybridized With Carbon Materialsmentioning

confidence: 99%

“…Hybridizing MOFs with carbon materials is another useful strategy to improve the charge transfer characteristic and conductivity [40,67,81] . Due to the porous nature of carbon materials, these composites maintain suitable pore size distribution to bridge discrete MOFs particles for facilitating the charge transfer.…”

Section: Preparation Of Conductive Mofs and Their Compositesmentioning

confidence: 99%

“…[5] Diverse conductive composites of MOFs with carbons or conducting polymers have been fabricated and proved to be the decent electrode active materials in supercapacitors. [40,41] In recent years, the design and synthesis of conductive MOFs and their composites for supercapacitors have been increasingly reported. [1,42,43] Herein, this minireview summarizes a brief overview of the synthesis methods of intrinsically conductive MOFs and conductive MOFs composites as well as their application in supercapacitors, which would facilitate further research and development of MOFs in energy-storage industry.…”

Section: Introductionmentioning

confidence: 99%

“…Meanwhile, in consideration of the relatively high cost and few types of intrinsically conductive MOFs as well as most of the conventionally nonconductive MOFs, hybridizing MOFs with other conducting materials to construct conductive MOFs composites is another available approach, in which the conducting materials could act as the electron transportation paths among isolated MOFs crystals to decrease the bulk electric resistance in electrodes [5] . Diverse conductive composites of MOFs with carbons or conducting polymers have been fabricated and proved to be the decent electrode active materials in supercapacitors [40,41] . In recent years, the design and synthesis of conductive MOFs and their composites for supercapacitors have been increasingly reported [1,42,43] .…”

Section: Introductionmentioning

confidence: 99%

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Design and Synthesis of Conductive Metal‐Organic Frameworks and Their Composites for Supercapacitors

et al. 2021

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Supercapacitors possess important prospects in power supply, owing to the characteristics of fast charging/discharging and long cycling life. As emerging materials, metal-organic frameworks (MOFs) are the cutting-edge electrode active materials for supercapacitors due to their good conductivity, tunable pore structure, as well as diverse composition. In this Minireview, we summarize the recent progress in MOF electrodes for supercapacitors. We focus on the synthesis of intrinsically conductive MOFs constructed from different organic linkers and adjustable metal ions, and the preparation of conductive MOF composites hybridized with conducting materials (conducting polymers and carbons). Following the discussion of both different types of conductive MOFs and their composites in supercapacitors, the challenges, and opportunities of conductive MOF electrodes for supercapacitors are further prospected at the end of this contribution, which would provide some valuable insights in facilitating the use of MOF materials in energy-storage applications.

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Section: Mofs Hybridized With Carbon Materialsmentioning

confidence: 99%

Section: Preparation Of Conductive Mofs and Their Compositesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Design and Synthesis of Conductive Metal‐Organic Frameworks and Their Composites for Supercapacitors

et al. 2021

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“…However, the rGO‐Ni‐doped‐MOF‐5 composite electrode attains an energy density of 37.8 Wh kg −1 at power density of 226.7 W kg −1 . Zhao and co‐workers [79] designed a core‐shell composite structure (CNF@Ni‐CAT) of CNF (core) and 2D conductive Ni‐catecholate (Ni‐CAT) MOF (shell) for the positive electrodes of asymmetric supercapacitors. From the rate capability perspective, the CNF@Ni‐CAT sacrifices the specific capacitance from 502.95 to 358.43 F g −1 ( i. e ., 71.27 %) at 0.5 to 10 A g −1 , while the respective figures for pristine Ni‐CAT are 321.97 and 182.76 F g −1 ( i. e ., 56.76 %).…”

Section: Metal‐organic‐framework (Mofs)mentioning

confidence: 99%

Envisaging Future Energy Storage Materials for Supercapacitors: An Ensemble of Preliminary Attempts

et al. 2021

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Recent developments in supercapacitor technology in terms of materials and devices are reviewed herein. Beyond the conventional materials (i. e., carbonaceous matters, metallic compounds and conducting polymers), various multifunctional materials are reported in literature as future supercapacitive materials. A comprehensive account on such materials is lacking due to the diversified electrochemical characteristics of these materials. In this review, we bring all such non‐conventional multifunctional energy storage materials under a same umbrella for summarizing the recent advancements in supercapacitors. The envisaged multifunctional materials include metal‐organic‐frameworks (MOFs), covalent‐organic‐frameworks (COFs), heteroatom‐doped carbonaceous materials, biomass‐derived porous carbons, black phosphorous, mixed conductors, perovskite nanoparticles, polyoxometalates (POMs), redox active electrolytes, slurry materials for flow supercapacitors, thermal self‐charging materials, thermal self‐protective materials, piezoelectric materials and electrochromic materials. Inherent pros and cons of each class of material are discussed, and materials modifications towards the successful device fabrications are highlighted herewith. While the MOF‐based supercapacitors are drawing some attentions, other non‐conventional energy storage materials are truly in the nascent stage of developments. This review culminates with summary and proposed future directions for product developments. In brief, this article provides a holistic view regarding all non‐conventional multifunctional energy storage materials for future supercapacitor technology.

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An insight Into Surface and Diffusion Characteristics of UiO‐66@ZIF‐8 Core–Shell MOF for Asymmetric Supercapacitors with Unprecedented Energy Density

Mansi,

Shrivastav,

Dubey

et al. 2024

Advanced Sustainable Systems

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In this study, nanosized zeolitic imidazolate framework‐8 (ZIF‐8) crystal has been produced on the universitetet i oslo‐66 (UiO‐66) metal–organic framework (MOF) to make core–shell structure using a layer‐by‐layer deposition method. In comparison to the pristine UiO‐66 and ZIF‐8, the core–shell MOF exhibits superior performance in terms of specific capacitance. This enhanced performance is attributed to its remarkable ability to facilitate the rapid diffusion of electrolyte ions through nanosized ZIF‐8 and enhance the electron transfer process involving the inner and outer metal ions within the UiO‐66@ZIF‐8 structure. Remarkably, the core–shell structure achieves an impressive specific capacitance of 588.8 F g−1 at a current density of 0.5 A g−1 using 1 m sulfuric acid (H2SO4) aqueous electrolyte. Additionally, the UiO‐66@ZIF‐8 core–shell material is demonstrated as a positive electrode, coupled with activated carbon (AC) derived from waste tissue paper serving as the negative electrode, in the fabrication of an asymmetric supercapacitor (ASC) device. At a power density of 400 W kg−1, this assembled asymmetric device delivers a notably high energy density of 53 Wh kg−1 along with a cyclic stability of 94.8% after 10 000 cycles. This study substantiates the superior performance of the UiO‐66@ZIF‐8 core–shell MOF structure as a highly effective supercapacitor electrode material, surpassing the performance of its pristine MOF counterparts.

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Core–shell assembly of carbon nanofibers and a 2D conductive metal–organic framework as a flexible free-standing membrane for high-performance supercapacitors

Abstract: A hybrid core–shell material based on carbon nanofibers and a 2D conductive metal–organic framework has been fabricated into a flexible free-standing membrane as an electrode material for supercapacitors.

Cited by 77 publications

References 40 publications

Design and Synthesis of Conductive Metal‐Organic Frameworks and Their Composites for Supercapacitors

Design and Synthesis of Conductive Metal‐Organic Frameworks and Their Composites for Supercapacitors

Envisaging Future Energy Storage Materials for Supercapacitors: An Ensemble of Preliminary Attempts

An insight Into Surface and Diffusion Characteristics of UiO‐66@ZIF‐8 Core–Shell MOF for Asymmetric Supercapacitors with Unprecedented Energy Density

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