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

Abstract

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.

Electrocatalysis in confined spaces: interplay between well-defined materials and the microenvironment

“…CNTs are wrapped into cylinder tubes by graphene layers through sp 2 bonds that hold the carbon atoms into an aromatic ring structure. 26,27 Such a well-defined structure with the strong π-electron interaction results in outstanding electrical capacitance and intriguing quantum effects of CNTs. 27 Recent research has demonstrated that using CNTs as the carbon support in electrocatalysis provides synergistic interactions with metal catalysts and thus improves catalytic activity and selectivity.…”

“…26,27 Such a well-defined structure with the strong π-electron interaction results in outstanding electrical capacitance and intriguing quantum effects of CNTs. 27 Recent research has demonstrated that using CNTs as the carbon support in electrocatalysis provides synergistic interactions with metal catalysts and thus improves catalytic activity and selectivity. 28,29 To date, many M@CNTs have been engineered into high-efficiency electrocatalysts in a range of electrocatalytic reactions such as ORR, water-splitting reactions, CO 2 RR, and NRR.…”

Ultrahigh‐Areal Capacitance Flexible Supercapacitors Based on Laser Assisted Construction of Hierarchical Aligned Carbon Nanotubes

“…[1] Based on the GCD curves, the areal capacitance of the hierarchical VACNTs electrode are calculated by formula (3) and the value is ≈1300 mF cm −2 , which is higher than most reported carbon-based SCs (Table 1). [13,[22][23][24][25][26][27][28][29][30][31][32][33][34][35] In addition, the specific capacitance can also be obtained by means of CV curve integration, namely Equation (4).…”

“…g) Rate performance test of the Al micro grid-based VACNT SC from 13 to 91 mA cm −2 . h) A comparison of Al micro grid-based VACNT SC with other carbon-based SC reported in literature [22][23][24][25][26]. i) Performance comparison of laser-etched Al-based VACNTs SC with other carbon materials SCs reported in literature[27][28][29][30][31] .…”

A Review on the Secondary Surface Morphology of Electrospun Nanofibers: Formation Mechanisms, Characterizations, and Applications

“…In the late 1990s, the attention in this method has increased. Up to now, the publications′ number in the field of electrospinning has been increasing dramatically because of its ability to produce fibers with small diameters, ease of functionality, high specific surface area, good pore structures, flexibility, low density, excellent mechanical properties, extraordinary adjustability, and encouraging applications in different fields such as biomedical applications, energy harvesting, sensors, tissue engineering, self‐cleaning surfaces, catalyst, filtration, fuel cells applications, biological applications, food packaging applications, water treatment field, and so on.…”