General fabrication of metal-organic frameworks on electrospun modified carbon nanofibers for high-performance asymmetric supercapacitors

Tian, Di; Ao, Yue; Li, Weimo; Xu, Jiaqi

doi:10.1016/j.jcis.2021.05.138

Cited by 48 publications

(18 citation statements)

References 50 publications

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“…This process can also be used to generate Faradic/battery-type nanoparticles where there is a significant electrochemical contribution to the total capacitance. [16,17] However, the diameters and distribution of the engineered particles cannot be controlled during this process, and the porosity of the resulting nanofibers is also decreased.…”

mentioning

confidence: 99%

Embedding Metal–Organic Frameworks for the Design of Flexible Hybrid Supercapacitors by Electrospinning: Synthesis of Highly Graphitized Carbon Nanofibers Containing Metal Oxide Nanoparticles

Zhu²,

et al. 2022

Small Structures

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Electrospun carbonaceous fibers have emerged as promising electrode materials for application in energy storage devices. However, their relatively poor electrical conductivity (due to their amorphous carbon structures) and low capacitive performance lead to poor prospects for their further application. Herein, a universal synthesis of highly graphitized carbon nanofibers, containing various metal oxide nanoparticles (e.g., Fe2O3, NiO), by the pyrolysis of metal–organic framework (MOF)‐embedded electrospun nanofibers, is reported. The resulting carbon nanofibers exhibit large mesopore volumes, contain large quantities of Faradic metal oxide nanoparticles, and are highly graphitized. The fibers also have excellent mechanical flexibility, provide fast ion transfer characteristics, and a large pseudocapacitance combined with excellent electrical conductivity, leading to large specific capacitances. Consequently, asymmetric flexible hybrid supercapacitors assembled from Fe2O3‐embedded highly graphitized carbon nanofibers (FOCNF) and NiO‐embedded highly graphitized carbon nanofibers (NOCNF) exhibit a high energy density of 43.1 Wh kg−1 at a power density of 412.5 W kg−1 and possess excellent flexibility (capacitance retention of 94.4% at 180° bending and 96.2% at 30° twisting) with superior cycling stability. This strategy provides a new MOF‐based approach for the design and synthesis of multifunctional flexible carbonaceous materials and might lead to their further application in flexible energy storage devices.

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confidence: 99%

Embedding Metal–Organic Frameworks for the Design of Flexible Hybrid Supercapacitors by Electrospinning: Synthesis of Highly Graphitized Carbon Nanofibers Containing Metal Oxide Nanoparticles

Zhu²,

et al. 2022

Small Structures

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“…In this case, the diffraction peaks of the prepared Co-MOF are consistent with simulated data, illustrating its commendable synthesis. 17,18 Meanwhile, it could be observed from the XRD patterns that there was no significant change in the derivative peaks of the obtained NiCo-MOF when the Ni 2+ ions were doped into the Co-MOFs. Nevertheless, as shown in Figure 2b, the intensity of the derivative peaks of NiCo-MOFs varied somewhat as the addition of Ni 2+ changes, which could be ascribed to the doping of Ni 2+ affecting the crystallinity of Co-MOF.…”

Section: Morphologies and Compositionsmentioning

confidence: 98%

One-Step Solvothermal Synthesis of Raspberry-like NiCo-MOF for High-Performance Flexible Supercapacitors for a Wide Operation Temperature Range

et al. 2022

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As a novel electrode material for energy storage, metal− organic frameworks (MOFs) emerge with plenty of merits and certain drawbacks in the field of supercapacitors. Nevertheless, most MOFs synthesized for the moment are faced with dimension/distribution issues and dissatisfactory electrical conductivity. Hence, in this paper, NiCo-MOF was successfully fabricated by applying a one-step solvothermal method, from which NiCo-MOF-3 presents an optimal electrochemical performance compared to other NiCo-MOFs and Ni/Co-MOF. Owing to its unique three-dimensional spherical raspberry structure, NiCo-MOF-3 demonstrates an available internal resistance and electron transfer resistance to ameliorate electrical energy storage, exhibiting an excellent mass specific capacitance of 639.8 F/g at 1 A/g. Then, a flexible quasi-solid-state asymmetric supercapacitor was assembled with NiCo-MOF-3 as the positive electrode. The introduction of K 3 [Fe(CN) 6 ] and glycerin in the gel electrolyte facilitates the maximum energy density of 66.3 Wh/kg of the device, with a corresponding power density reaching its maximum of 12,047 W/kg. The device's apparent energy density, excellent flexibility, and temperature resistance reveal that our method to prepare supercapacitor electrode material possesses more advantages than those in the former literature.

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“…In particular, CNFs have a continuous conductive network and large specific surface area, which are often used as a conductive substrate compounded with other materials. [15] High-molecular conductive polymers and metal oxides/hydroxides are generally utilized as electrode materials for PCs, which enjoy the benefits of high hypothetical explicit capacitance, minimal expense, and ecological agreeableness. [16] Owing to its large theoretic specific capacitance (SC) (2082 F g À 1 ), rapid reversible redox reaction, ease of synthesis and low cost, Ni(OH) 2 has previously been investigated.…”

Section: Introductionmentioning

confidence: 99%

Core‐shell Nanofiber‐based Electrodes for High‐performance Asymmetric Supercapacitors

Fan

2023

ChemistrySelect

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Supercapacitors are considered as important energy conversion and storage devices, and one-dimensional carbon nanofibers derived from electrospinning have been widely applied for supercapacitor electrode materials. The integration of carbon and metal hydroxide materials has become particularly important in order to pursue their higher electrochemical properties. In this paper, a one-dimensional core-shell electrode with Ni(OH) 2 as shell and carbon nanofibers as core (Ni/CNFs@Ni-(OH) 2 ) was fabricated by electrospinning, high-temperature carbonization and hydrothermal synthesis. This electrode exhibited high energy storage performance (785 F g À 1 (1 A g À 1 )), good coulombic efficiency and cycling stability. Furthermore, the asymmetric supercapacitor (ASC) assembled with activated carbons as negative electrode and Ni/CNFs@Ni(OH) 2 as positive electrode demonstrated a good energy storage performance (62.5 F g À 1 (1.6 V)). Meanwhile, this ASC displayed a significant energy density of 22.2 Wh kg À 1 at 800 W kg À 1 and an outstanding rate capability, indicating that Ni/CNFs@Ni(OH) 2 had a high potential application value in supercapacitors.

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General fabrication of metal-organic frameworks on electrospun modified carbon nanofibers for high-performance asymmetric supercapacitors

Cited by 48 publications

References 50 publications

Embedding Metal–Organic Frameworks for the Design of Flexible Hybrid Supercapacitors by Electrospinning: Synthesis of Highly Graphitized Carbon Nanofibers Containing Metal Oxide Nanoparticles

Embedding Metal–Organic Frameworks for the Design of Flexible Hybrid Supercapacitors by Electrospinning: Synthesis of Highly Graphitized Carbon Nanofibers Containing Metal Oxide Nanoparticles

One-Step Solvothermal Synthesis of Raspberry-like NiCo-MOF for High-Performance Flexible Supercapacitors for a Wide Operation Temperature Range

Core‐shell Nanofiber‐based Electrodes for High‐performance Asymmetric Supercapacitors

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