Constructing optimized three-dimensional electrochemical interface in carbon nanofiber/carbon nanotube hierarchical composites for high-energy-density supercapacitors

Zhou, Jinyuan; Chen, Jiayi; Han, Sheng; Zhao, Hao; Bai, Jingwei; Yang, Zhenyu; Mu, Xuemei; Liu, Ying; Bian, Damin; Sun, Gengzhi; Zhang, Zhenxing; Pan, Xiaojun; Xie, Erqing

doi:10.1016/j.carbon.2016.10.036

Cited by 51 publications

(27 citation statements)

References 52 publications

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“…To confirm the graphitization degree of the 3D Ni@CNTs‐500 composites, the Raman spectrum was carried out. Characteristic D band (1344 cm −1 ), G band (1587 cm −1 ), 2D band (2679 cm −1 ) and D+G band (2920 cm −1 ) were detected in Figure f . The intensity ratio of the D and G band (I D /I G ) was 1.27, which represents the existence of defects in the CNTs.…”

Section: Resultsmentioning

confidence: 88%

Ultra‐Stable Asymmetric Supercapacitors Constructed by In‐Situ Electro‐Oxidation Activated Ni@CNTs Composites

et al. 2018

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Up to now, it is still an enormous challenge to build high‐performance asymmetric supercapacitors showing long cycling life and superior rate capability. In this work, unique three‐dimensional nickel deposited onto carbon nanotubes (Ni@CNTs) composites are synthesized by a reduction and catalytic growth process with ethanol as both, reductive agent and green carbon source. Asymmetric supercapacitors are assembled by only using the Ni@CNTs composites as positive and negative electrodes with our concept “one for two”, in rational combination with electro‐oxidation activation. Here, the three‐dimensional CNTs are responsible for the electric double layer capacitance and the encapsulated NiOOH nanoparticles derived from electro‐oxidation reaction contribute to pseudocapacitance. The asymmetric devices exhibit remarkable cycling stability with 100 % capacitance retention even up to 60,000 cycles at a current density of 10 mA cm−2 and excellent rate capability with 72.9 % capacitance retention with the current density increasing from 5 to 50 mA cm−2. To better understand the electrochemical behavior, the relative contributions from electric double layer capacitance and pseudocapacitance of the positive electrode as well as the electrochemical kinetics of the devices are quantified.

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Section: Resultsmentioning

confidence: 88%

Ultra‐Stable Asymmetric Supercapacitors Constructed by In‐Situ Electro‐Oxidation Activated Ni@CNTs Composites

et al. 2018

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“…GCD tests were also explored with 1.6‐V operating potential at disparate current densities in Figure C. The curves of GCD with symmetrical shape indicated the quick charging and discharging behaviour . In Figure D, the specific capacitance of ASC calculated from GCD curves was 94.26 F g −1 at 0.5 A g −1 .…”

Section: Resultsmentioning

confidence: 99%

Synthesis and characterisation of amorphous MnO ₂ /CNT via solid‐state microwave for high‐performance supercapacitors

et al. 2020

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Summary Amorphous MnO2 was attached to carbon nanotubes (CNTs) in 60 seconds by solid‐state microwave method. As electrodes in supercapacitors, the coactions of the MnO2 and CNT augmented the actual value of capacitance to 1250 F g−1, and cycle steadiness held 80% of the starting value after 7000 cycles. The equipped MnO2/CNT//AC asymmetric supercapacitor (ASC) manifested preferable energy density with 33.5 Wh kg−1 (at 400 W kg−1). Its glorious electrochemical properties of MnO2/CNT demonstrated that the microwave method has great potency to realise the composite of electrode materials.

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“…Consequently, the erupted fibers will be attracted toward the collector . Electrospinning technology has many advantages making it a distinctive method for preparing 1D nanomaterial:(1) the ability to produce large quantities of mats by modifying the compounds; (2) ability to produce 1D, 2D, and 3D fibers in μ‐nm diameters;,, (3) the ability to produce hybrid and composite nanofibers (e. g., CNTs, graphene sheets, metal oxides, and ceramic particles, etc.) with good distribution; (4) the relatively low‐operational cost and ease in parameter adjustments, and no need for specific conditions (e. g., flammable atmospheres when compared to the CVD method of producing CNTs); and (5) the final products can be followed by other chemical or thermal treatments .…”

Section: Electrospinning Technique and Its Parametersmentioning

confidence: 99%

“…prepared 1D CNTs/CNFs from polymeric solution consist of PAN/Ni (Ac) 2 /PMMA dissolved DMF, Poly methyl methacrylate (PMMA) facilities to form a porous structure and as a C 2 H 2 source of growth CNTs . Zhou et al . prepared CNFs/CNTs scaffolds via hybrid process consist of sol‐gel, electrospinning, and CVD processes since the CNFs diameters directly affected by PAN concentration.…”

Section: Preparation Steps Of Grown Cnts On Cnfsmentioning

confidence: 99%

“…prepared CNFs/CNTs scaffolds via hybrid process consist of sol‐gel, electrospinning, and CVD processes since the CNFs diameters directly affected by PAN concentration. The density and length of grown CNTs controlled by the content of ferric salts and calcination time, respectively . Zeolitic Imidazolate Framework‐67 (ZIF‐67) converted to CNTs through further heating treatment under Ar/H 2 atmosphere .…”

Section: Preparation Steps Of Grown Cnts On Cnfsmentioning

confidence: 99%

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Grown Carbon Nanotubes on Electrospun Carbon Nanofibers as a 3D Carbon Nanomaterial for High Energy Storage Performance

Alali

Liu

et al. 2019

ChemistrySelect

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Carbon hierarchical nanostructures have been widely applied because of their outstanding properties and large surface area. Future energy materials for applications, such as Li‐ion, Li‐sulfur, Li‐air batteries, and supercapacitors require materials with high energy density and power capability. The preparation of three‐dimensional (3D) carbon nanotubes (CNTs)‐carbon nanofibers (CNFs) nanomaterials through a multi‐step process has many difficulties. The aggregation, the high expense of CNTs, and the difficult conditions for synthesizing CNTs have pushed researchers to consider new methods. The direct growth of CNTs on CNFs via one‐step electrospinning and a combined pyrolysis process is an efficient method for preparing 3D CNTs‐CNFs, as demonstrated in the literature. Herein, the importance of the hybrid 3D CNTs‐CNFs nanomaterials is reviewed, as well as their growth mechanisms, and the parameter influence on the morphology of grown CNTs. Moreover, the performance of the electrochemical energy storage for the hybrid CNTs grown on CNFs in the literature is reviewed and explained. Finally, the nanomaterials form the CNTs grown CNFs have great potential for various applications.

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Constructing optimized three-dimensional electrochemical interface in carbon nanofiber/carbon nanotube hierarchical composites for high-energy-density supercapacitors

Cited by 51 publications

References 52 publications

Ultra‐Stable Asymmetric Supercapacitors Constructed by In‐Situ Electro‐Oxidation Activated Ni@CNTs Composites

Ultra‐Stable Asymmetric Supercapacitors Constructed by In‐Situ Electro‐Oxidation Activated Ni@CNTs Composites

Synthesis and characterisation of amorphous MnO ₂ /CNT via solid‐state microwave for high‐performance supercapacitors

Grown Carbon Nanotubes on Electrospun Carbon Nanofibers as a 3D Carbon Nanomaterial for High Energy Storage Performance

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Constructing optimized three-dimensional electrochemical interface in carbon nanofiber/carbon nanotube hierarchical composites for high-energy-density supercapacitors

Cited by 51 publications

References 52 publications

Ultra‐Stable Asymmetric Supercapacitors Constructed by In‐Situ Electro‐Oxidation Activated Ni@CNTs Composites

Ultra‐Stable Asymmetric Supercapacitors Constructed by In‐Situ Electro‐Oxidation Activated Ni@CNTs Composites

Synthesis and characterisation of amorphous MnO 2 /CNT via solid‐state microwave for high‐performance supercapacitors

Grown Carbon Nanotubes on Electrospun Carbon Nanofibers as a 3D Carbon Nanomaterial for High Energy Storage Performance

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Synthesis and characterisation of amorphous MnO ₂ /CNT via solid‐state microwave for high‐performance supercapacitors