Crosslinked carbon nanofiber films with hierarchical pores as flexible electrodes for high performance supercapacitors

Ding, Jianping; Zhang, Hongping; Li, Xiaodong; Tang, Youhong; Yang, Guangcheng

doi:10.1016/j.matdes.2017.12.028

Cited by 24 publications

(5 citation statements)

References 57 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Comparably, HPCNF-10 exhibits the longest discharge time and the highest specific capacitance of 320 F/g at a current density of 0.5 A/g. Moreover, for HPCNF-10, its specific capacitance can still reach 215 F/g at a high current density of 30 A/g, about 67.2% of the specific capacitance at 0.5 A/g (Figure c), which are much higher than those of electrospun carbon fibers reported by others. ,− …”

Section: Resultsmentioning

confidence: 65%

Effects of Sodium Alginate on the Composition, Morphology, and Electrochemical Properties of Electrospun Carbon Nanofibers as Electrodes for Supercapacitors

Zhang

Wang

Zhao

et al. 2018

ACS Sustainable Chem. Eng.

View full text Add to dashboard Cite

Heteroatoms-doped porous carbon nanofibers (HPCNFs) are fabricated through electrospinning of polyacrylonitrile and poly(methyl methacrylate) in N,N-dimethylformamide with sodium alginate as additive, followed by pyrolysis. The morphology and composition of the as-fabricated HPCNFs have been characterized comprehensively by a variety of methods, including scanning and transmission electron microscopies, X-ray photoelectron spectroscopy, and other spectroscopic measurements. Supercapacitors are assembled with the as-obtained HPCNFs as electrodes, and their electric capacitance performances are investigated. The supercapacitors show high specific capacitance (253.2 F/g at 0.25 A/g in 1 M H2SO4 aqueous electrolyte), excellent rate capability, and prominent cycling durability (with capacitance maintenance of 99.8% after 10 000 cycles). It has also been illustrated that the heteroatom content and the morphology of porous carbon nanofibers can be simply tuned by varying the content of SA in the precursor solution, which determine finally the electrochemical performances of HPCNFs as the electrodes in supercapacitors.

show abstract

Section: Resultsmentioning

confidence: 65%

Effects of Sodium Alginate on the Composition, Morphology, and Electrochemical Properties of Electrospun Carbon Nanofibers as Electrodes for Supercapacitors

Zhang

Wang

Zhao

et al. 2018

ACS Sustainable Chem. Eng.

View full text Add to dashboard Cite

show abstract

“…Li et al observed that the porous carbon with a packing density of 0.75 g/cm 3 yielded a low volumetric capacitance of 200 F/cm 3 while maintaining a high gravimetric capacitance of 250 F/g. Nowadays, flexible carbon nanofiber (CNF) films are receiving significant attention since they can be easily fabricated with a tailored morphology and directly integrated into supercapacitors for customized electronic devices. , The major drawbacks for the CNF-based SC electrodes are inferior volumetric capacitance (∼80 F/cm 3 ) and low-rate capability because of their low packing density . The fabrication of a CNF with heteroatoms primarily generates additional pseudocapacitance via faradaic charge transfer and thus increases the capacitance.…”

Section: Introductionmentioning

confidence: 99%

N/P/O/S Heteroatom-Doped Porous Carbon Nanofiber Mats Derived from a Polyacrylonitrile/l-Cysteine/P₂O₅ Precursor for Flexible Electrochemical Supercapacitors

Ahmad

Anand

Dey

et al. 2021

ACS Appl. Energy Mater.

View full text Add to dashboard Cite

It is still a great challenge to achieve high volumetric capacitance without losing gravimetric capacitance and cycling performances for carbon-based electrode materials to fulfill the demands for next-generation supercapacitors. In this work, we have fabricated carbon nanofiber (CNF) mats doped with tetraheteroatoms (N, P, O, and S) via a two-step process: electrospinning and carbonization. The surface porosity, mass density, and doping density of the as-prepared doped CNFs were optimized by varying the l-cysteine-to-potassium pentoxide mass ratio in the polyacrylonitrile (PAN) precursor solution. The structural evaluation of different heteroatom species in the carbon lattice of the as-prepared NPOS-CNFs was systematically studied by various spectroscopic techniques. The optimized NPOS-CNF 12 nanofibers, which were prepared from the PAN precursor containing an l-cysteine/P2O5 mass ratio of 1:2, have a high specific surface area (502.5 m2/g), high mesopore volume (1.561 cm3/g), high mass density (1.07 g/cm3), and highest content (10.34 atom %) of active heteroatom species such as pyrrolic N, pyridinic N, CO, C–S, and C3–PO species. Due to these unique features, the NPOS-CNF 12 exhibited an ultrahigh volumetric capacitance of 625.8 F/cm3 at a current density of 0.2 A/g and also exhibited high gravimetric capacitance (584.8 F/g) and good cycling stability (93.5% capacitance retention after 10 000 cycles) in a 6 M KOH electrolyte. As assembled, the NPOS-CNF 12//NPOS-CNF 12 supercapacitor in a 1 M Na2SO4 electrolyte delivered a high gravimetric energy density of 102.6 Wh/kg at a power density of 105 W/kg with a wide potential window of 0–1.8 V.

show abstract

“…[24,25] While, for the fibrous carbon-based electrode, the construction of fiber-fiber interconnected structures of ECNFMs can increase the physical connection points between the fibers, resulting in establishing an electron transport channel between the fibers, which can promote the electron transport on the whole fiber electrode. [26][27][28] However, ECNFMs usually have typical nonwoven structures and there are no connection points between fibers, leading to low charge transfer efficiency and large contact resistance when they are used as electrodes, thus decreasing the specific capacitance of the ECNFMs electrodes. Therefore, how to establish an effective connection between fibers has always been a topic of concern.…”

Section: Introductionmentioning

confidence: 99%

High‐Performance All‐Solid‐State Supercapacitor Electrode Materials Using Freestanding Electrospun Carbon Nanofiber Mats of Polyacrylonitrile and Novolac Blends

Wang

Ruan

et al. 2021

Macro Materials & Eng

View full text Add to dashboard Cite

Herein, this paper reports a facile method to prepare electrospun carbon nanofiber mats (ECNFMs) with high specific surface area and interconnected structure using polyacrylonitrile (PAN) as a precursor and novolac resin (NOC) as a polymer sacrificial pore-making agent. Without additional treatment, the prepared ECNFMs have a highly porous structure because NOC decomposes in a wider temperature range than most polymer activators. The NOC content in the PAN nanofibers shows important effects on porosity. The BET specific surface area of ECNFMs reaches a maximum of 1468 m 2 g −1 when the precursor nanofibers contained 30 wt% NOC (ECNFM-3) after carbonization at 1000°C. The supercapacitor device from ECNFM-3 electrode and all-solid-state electrolyte shows excellent cycling durability and high specific capacitance: ≈99.72% capacitance retention after 10 000 charge/discharge cycles and ≈320 mF cm −2 at 0.25 mA cm −2 . Furthermore, it shows a large energy density of ≈11.1 Wh cm −2 under the power density of 500 mW m −2 . Activation of carbon nanofibers simply by the addition of NOC into precursor nanofibers can offer a handy way to prepare ECNFMs for high-performance all-solid-state supercapacitors and other potential applications.

show abstract

Crosslinked carbon nanofiber films with hierarchical pores as flexible electrodes for high performance supercapacitors

Abstract: Flexible, cross-linked carbon nanofibers (CNFs) film with hierarchical

Cited by 24 publications

References 57 publications

Effects of Sodium Alginate on the Composition, Morphology, and Electrochemical Properties of Electrospun Carbon Nanofibers as Electrodes for Supercapacitors

Effects of Sodium Alginate on the Composition, Morphology, and Electrochemical Properties of Electrospun Carbon Nanofibers as Electrodes for Supercapacitors

N/P/O/S Heteroatom-Doped Porous Carbon Nanofiber Mats Derived from a Polyacrylonitrile/l-Cysteine/P₂O₅ Precursor for Flexible Electrochemical Supercapacitors

High‐Performance All‐Solid‐State Supercapacitor Electrode Materials Using Freestanding Electrospun Carbon Nanofiber Mats of Polyacrylonitrile and Novolac Blends

Contact Info

Product

Resources

About

Crosslinked carbon nanofiber films with hierarchical pores as flexible electrodes for high performance supercapacitors

Abstract: Flexible, cross-linked carbon nanofibers (CNFs) film with hierarchical

Cited by 24 publications

References 57 publications

Effects of Sodium Alginate on the Composition, Morphology, and Electrochemical Properties of Electrospun Carbon Nanofibers as Electrodes for Supercapacitors

Effects of Sodium Alginate on the Composition, Morphology, and Electrochemical Properties of Electrospun Carbon Nanofibers as Electrodes for Supercapacitors

N/P/O/S Heteroatom-Doped Porous Carbon Nanofiber Mats Derived from a Polyacrylonitrile/l-Cysteine/P2O5 Precursor for Flexible Electrochemical Supercapacitors

High‐Performance All‐Solid‐State Supercapacitor Electrode Materials Using Freestanding Electrospun Carbon Nanofiber Mats of Polyacrylonitrile and Novolac Blends

Contact Info

Product

Resources

About

N/P/O/S Heteroatom-Doped Porous Carbon Nanofiber Mats Derived from a Polyacrylonitrile/l-Cysteine/P₂O₅ Precursor for Flexible Electrochemical Supercapacitors