Flower-shaped multiwalled carbon nanotubes@nickel-trimesic acid MOF composite as a high-performance cathode material for energy storage

Wang, Qinghua; Wang, Qingxiang; Xu, Biyan; Gao, Feng; Gao, Fei; Zhao, Chuan

doi:10.1016/j.electacta.2018.05.159

Cited by 89 publications

(40 citation statements)

References 39 publications

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“…The first and last five cycles of the GCD curves shown in the inset of Figure f displayed a nearly unchanged shape, testifying good stability of the TACC material. This excellent performance is superior to most pseudocapacitive supercapacitors, and many other carbon materials‐based EDLC‐typed supercapacitors, suggesting great practical application potential. We conclude that the excellent stability of TACC‐based supercapacitors was attributed to two reasons: (1) the surface structure of TACC had reached a robust and stable state after thermal treatment, which ensured the outstanding durability of electrodes during GCD test, even in high potential; (2) The symmetrical supercapacitor was constructed by monolith TACC electrodes without addition of any binder or active material, which avoid shedding of the active material.…”

Section: Resultsmentioning

confidence: 99%

“…Supercapacitors offer various attractive properties, such as fast charge/discharge rate, long lifespan, environmentally friendly, high safety, and excellent areal capacitance, making them very promising for the next‐generation wearable electronics applications. According to the difference of energy storage mechanism, supercapacitors are divided into two categories, i. e ., electrical double‐layer capacitors (EDLCs) and pseudocapacitors.…”

Section: Introductionmentioning

confidence: 99%

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Thermally Activated Multilayered Carbon Cloth as Flexible Supercapacitor Electrode Material with Significantly Enhanced Areal Energy Density

et al. 2019

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Carbon cloth, an inexpensive and conductive textile, holds great promise as substrate for constructing electrical double-layer capacitors due to its mechanical and electrochemical superiority. However, its widespread application is significantly hampered by the intrinsic low specific capacity. In this work, we demonstrate that the areal capacitance of commercial carbon cloth is raised for 800-folds by a direct thermal activation strategy. When evaluated as the symmetric supercapacitor electrodes, thermally activated carbon cloth (TACC) displays the outstanding performance with areal capacitance up to 3291 mF cm À 2 and the energy density of 740 μW h cm À 2 at a power density of 9000 μW cm À 2 . In addition, the TACC-based electrode reserves 95.2 % capacitance after 10,000 chargedischarge cycles in a neutral NaBF 4 electrolyte, showing outstanding cycle durability of the material. This work offers a foolproof and scalable method to prepare flexible electrode materials for wearable energy storage devices.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Thermally Activated Multilayered Carbon Cloth as Flexible Supercapacitor Electrode Material with Significantly Enhanced Areal Energy Density

et al. 2019

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“…The peak at 1286 cm −1 is also ascribed to the stretching vibration of C-O bond in the uncoordinated free carboxyl on the surface of the MOFs [29]. The band at 636 cm −1 was attributed to the stretching vibrations of para-aromatic CH groups and δ-OH [28].…”

Section: Fourier Transform Infrared Spectroscopy (Ftir)mentioning

confidence: 96%

Electrochemical studies on Ni, Co & Ni/Co-MOFs for high-performance hybrid supercapacitors

Radhika¹,

Gopalakrishna²,

Chaitra³

et al. 2020

Mater. Res. Express

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Metal-organic framework (MOF) of Ni-MOF, Co-MOF, and Ni/Co-MOF were synthesized by a facile hydrothermal method using Trimesic acid as structure directing linker. The physico-chemical properties of the synthesized MOFs were characterized by P-XRD (powder X-ray diffraction), FT-IR (fourier transform infrared spectroscopy), SEM-EDS (scanning electron microscopy/energydispersive X-ray spectroscopy), HR-TEM (high-resolution transmission tlectron microscope) and BET (Brunner Emmett Teller) surface area techniques. The supercapacitance performance of these MOFs were studied by electroanalytical techniques such as cyclic voltammetry (CV), chronopotentiometry (CP) and electrochemical impedance spectroscopy (EIS). Amongst the MOFs investigated, Ni/Co-MOF exhibited highest specific capacitance (C s ) of 2041 F g −1 at a scan rate of 2 mV s −1 and 980 F g −1 at a current density of 2.5 A g −1 . Ni/Co-MOFs delivered a maximum energy density (ED) of 55.7 W h Kg −1 at a corresponding power density (PD) of 1 K W kg −1 and maximum PD of 9.8 K W kg −1 at an ED of 41.6 W h Kg −1 . An outstanding supercapacitance performance with superior columbic efficiency of 98.4% and capacitive retention of 73% after 5000 cycles marks this material as potential candidate for supercapacitors (SCs). A comparative electrochemical study of these MOFs were made in three electrode system, further electrochemical performance was corelated with their physico-chemical properties.

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“…[56,57] In the field of classical electronic applications, such composites have been tested as supercapacitors [58,59] or as electrode materials in batteries. [60][61][62][63][64] Furthermore, they can be used as electrocatalyst for water splitting [65] or as sensing materials for humidity [66] or glucose. [67] In resistive sensors, where the state of the MOF (i. e., guest-free or loaded) is expected to directly influence the electrical properties of the composite, homogeneous materials with strong interactions between the components are called for.…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, there are studies for the use as separators, phase change materials, oxidation catalysts or various detectors . In the field of classical electronic applications, such composites have been tested as supercapacitors or as electrode materials in batteries . Furthermore, they can be used as electrocatalyst for water splitting or as sensing materials for humidity or glucose .…”

Section: Introductionmentioning

confidence: 99%

Electrically Conducting Nanocomposites of Carbon Nanotubes and Metal‐Organic Frameworks with Strong Interactions between the two Components

et al. 2019

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Highly integrated nanocomposites of Zr‐based metal‐organic frameworks (MOFs) of the UiO‐66 class and multi‐wall carbon nanotubes (MWCNTs) are prepared by direct crystallization of MOFs in the presence of CNTs. Powder samples with homogeneously distributed and strongly intergrown nanotubes and nanoparticles are obtained. Growth of the MOFs in the presence of CNTs deposited on glass slides yields open or compact coatings of the nanocomposites. The materials combine the high porosity and versatility of MOFs with the high electrical conductivities of CNTs. Upon increasing the amount of CNTs in the synthesis, the electrical conductivity shows a clear percolation behavior. Even with small amounts of CNTs, high conductivities are observed. SEM and TEM pictures show the strong intergrowth between the CNTs and the MOF nanoparticles. Crystallization times are shorter in the presence of CNTs, and CNTs run centrally through the MOF crystals. These facts indicate that the CNTs serve as heterogeneous nucleation centers for the formation of MOF nanocrystals. Sensing experiments performed on the coatings show significant changes in the electrical conductivities of the nanocomposite materials in the presence of different analytes, which are also discernable from the changes observed on bare CNTs. This is further proof for the close interaction between the components of the nanocomposites.

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Flower-shaped multiwalled carbon nanotubes@nickel-trimesic acid MOF composite as a high-performance cathode material for energy storage

Cited by 89 publications

References 39 publications

Thermally Activated Multilayered Carbon Cloth as Flexible Supercapacitor Electrode Material with Significantly Enhanced Areal Energy Density

Thermally Activated Multilayered Carbon Cloth as Flexible Supercapacitor Electrode Material with Significantly Enhanced Areal Energy Density

Electrochemical studies on Ni, Co & Ni/Co-MOFs for high-performance hybrid supercapacitors

Electrically Conducting Nanocomposites of Carbon Nanotubes and Metal‐Organic Frameworks with Strong Interactions between the two Components

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