Micro-meso porous structured carbon nanofibers with ultra-high surface area and large supercapacitor electrode capacitance

Wang, He; Niu, Haitao; Wang, Hongjie; Wang, Wenyu; Jin, Xin; Wang, Hongxia; Zhou, Hua; Lin, Tong

doi:10.1016/j.jpowsour.2020.228986

Cited by 156 publications

(49 citation statements)

References 62 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Remarkably, these 1 D carbon-based nanotubes with ultrahigh SSAs could provide ions through a more favorable transport route and supply abundant active sites. 3,40 The pore diameter of the HCT was mainly in the range 15−20 nm, and the NHCT was about 10 nm and 15−20 nm in dimension, indicating that the two hollow nanotubes were the typical mesoporous materials (Figure S9). Raman spectrum analysis of the HCT and NHCT exhibited the two ) and G peak (1581 cm −1 ) (Figure 2c).…”

Section: Resultsmentioning

confidence: 99%

Controllable Design and Preparation of Hollow Carbon-Based Nanotubes for Asymmetric Supercapacitors and Capacitive Deionization

Zhang

Wei

et al. 2021

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

Carbon-based materials are important desirable materials in areas such as supercapacitors and capacitive deionization. However, traditional commercial materials are heterogeneous and prone to agglomeration in nanoscale and have structural limitation of electrochemical and desalination performance due to poor transport channels and low capacitance of prepared electrodes. Here, we introduce the facile strategy for controllable preparation of two types of hollow carbon-based nanotubes (HCTs) with amorphous mesoporous structures, which are synthesized by employing a MnO2 linear template method and calcination of polymer precursors. The porous N-doped HCT (NHCT) shows a specific capacitance of 412.6 F g–1 (1 A g–1), with 77.3% rate capability (20 A g–1). The fabricated asymmetric MnO2//NHCT supercapacitor displays the energy density of 55.8 Wh kg–1 at a power density of 803.9 W kg–1. Furthermore, two typical MnO2//HCT and MnO2//NHCT devices both show the selective desalination performance of sulfate, and the MnO2//NHCT device possesses a high deionization value of 11.37 mg g–1 (500 mg L–1 Na2SO4). These fabricated hollow carbon-based architectures with functional characteristics promise potential applications in energy and environmental related fields.

show abstract

Section: Resultsmentioning

confidence: 99%

Controllable Design and Preparation of Hollow Carbon-Based Nanotubes for Asymmetric Supercapacitors and Capacitive Deionization

Zhang

Wei

et al. 2021

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

show abstract

“…These results indicate that the HPC-1/10 electrode enabled rapid ion diffusion, which is consistent with the electrical conductivity analysis. Considering the similarity in the surface areas of the HPC-1/10 sample and the phenol resin-based activated carbon, it can be concluded that the nanopores within the nano-network-like structure of HAC-1/10 between the activated carbon and ribbon-like nanosheets could be accessed more readily by electrolytes; thus, these nanopores present a significantly higher utilization rate than those in the phenol resin-based activated carbon [28][29][30][31][32]. Electrochemical impedance spectroscopy (EIS) was performed using a symmetric system to further evaluate the electrochemical performance.…”

Section: Resultsmentioning

confidence: 99%

sp2–sp3 Hybrid Porous Carbon Materials Applied for Supercapacitors

Chae

Kang²,

Roh

2021

Energies

View full text Add to dashboard Cite

Carbon materials have gained considerable attention in recent years due to their superior properties. Activated carbon has been used in supercapacitors due to its density and rapid adsorption capability. The sp2–sp3 hybrid porous carbon materials are synthesized using herringbone-type carbon nanofibers (CNFs) and carbonized spherical phenol resins, with KOH as the activating agent. The morphology of the hybrid porous carbon facilitates the formation of ribbon-like nanosheets from highly activated CNFs wrapped around spherical resin-based activated carbon. The etching and separation of the CNFs produce a thin ribbon-like nanosheet structure; these CNFs simultaneously form new bonds with activated carbon, forming the sp2–sp3 hybrid porous structure. The relatively poor electrical conductivity of amorphous carbon is improved by the 3D conductive network that interconnects the CNF and amorphous carbon without requiring additional conductive material. The composite electrode has high electron conductivity and a large surface area with a specific capacitance of 120 F g−1. Thus, the strategy substantially simplifies the hybrid materials of sp2-hybridized CNFs and sp3-hybridized amorphous spherical carbon and significantly improves the comprehensive electrochemical performance of supercapacitors. The developed synthesis strategy provides important insights into the design and fabrication of carbon nanostructures that can be potentially applied as electrode materials for supercapacitors.

show abstract

“…Unlike other synthesis strategies for growing V 2 O 5 on a carbon nanofiber substrate, the electrospinning technique can directly produce VCNF composite materials [110]. The placement of a solution of a carbonaceous material such as polyacrylonitrile (PAN) and V 2 O 5 in an electrospinning apparatus resulted in a flexible nanofiber composite material with controllable porosity and composition [111]. Kim et al electrospun VCNF fibers using a dispersion of PAN and different amounts of V 2 O 5 in a DMF solution [112].…”

Section: Effects Of Synthesis Methodsmentioning

confidence: 99%

Recent Development in Vanadium Pentoxide and Carbon Hybrid Active Materials for Energy Storage Devices

et al. 2021

View full text Add to dashboard Cite

With the increasing energy demand for portable electronics, electric vehicles, and green energy storage solutions, the development of high-performance supercapacitors has been at the forefront of energy storage and conversion research. In the past decade, many scientific publications have been dedicated to designing hybrid electrode materials composed of vanadium pentoxide (V2O5) and carbon nanomaterials to bridge the gap in energy and power of traditional batteries and capacitors. V2O5 is a promising electrode material owing to its natural abundance, nontoxicity, and high capacitive potential. However, bulk V2O5 is limited by poor conductivity, low porosity, and dissolution during charge/discharge cycles. To overcome the limitations of V2O5, many researchers have incorporated common carbon nanostructures such as reduced graphene oxides, carbon nanotubes, carbon nanofibers, and other carbon moieties into V2O5. The carbon components facilitate electron mobility and act as porous templates for V2O5 nucleation with an enhanced surface area as well as interconnected surface morphology and structural stability. This review discusses the development of various V2O5/carbon hybrid materials, focusing on the effects of different synthesis methods, V2O5/carbon compositions, and physical treatment strategies on the structure and electrochemical performance of the composite material as promising supercapacitor electrodes.

show abstract

Micro-meso porous structured carbon nanofibers with ultra-high surface area and large supercapacitor electrode capacitance

Cited by 156 publications

References 62 publications

Controllable Design and Preparation of Hollow Carbon-Based Nanotubes for Asymmetric Supercapacitors and Capacitive Deionization

Controllable Design and Preparation of Hollow Carbon-Based Nanotubes for Asymmetric Supercapacitors and Capacitive Deionization

sp2–sp3 Hybrid Porous Carbon Materials Applied for Supercapacitors

Recent Development in Vanadium Pentoxide and Carbon Hybrid Active Materials for Energy Storage Devices

Contact Info

Product

Resources

About