Nitrogen-containing carbon spheres with very large uniform mesopores: The superior electrode materials for EDLC in organic electrolyte

Li, Wenrong; Chen, Dehong; Li, Zheng; Shi, Yifeng; Wan, Ying; Wang, Guan; Jiang, Zhiyu; Zhao, Dongyuan

doi:10.1016/j.carbon.2007.05.004

Cited by 334 publications

(184 citation statements)

References 31 publications

Supporting

Mentioning

177

Contrasting

Unclassified

Order By: Relevance

“…Carbonaceous materials are well-known examples of DL capacitive materials. [2,35] However, carbon-based electrocapacitive systems usually exhibit moderate specific capacitances, especially at high operation rates; for many carbon systems of various forms, [36][37][38][39][40][41][42][43][44][45][46][47] the optimal capacitance value obtained at a high scan rate of 0.1 V/s or at a high current density of 1 A/g is typically 50-150 F/g, and rarely exceeds 200 F/g. Nonetheless, carbon electrodes are still the most popular choice to date for use in commercial supercapacitor devices due to their ease of synthesis, low cost, and exceptional chemical and electrochemical stability.…”

Section: Introductionmentioning

confidence: 99%

Microwave-Assisted Oxidation of Electrospun Turbostratic Carbon Nanofibers for Tailoring Energy Storage Capabilities

Mao

Yang

et al. 2015

Chem. Mater.

View full text Add to dashboard Cite

We report the systematic structural manipulation of turbostratic electrospun carbon nanofibers (ECNFs) using a microwave-assisted oxidation process, which is extremely rapid, highly controllable, and affords controlled variation of the capacitive energy storage capabilities of ECNFs. We find a non-monotonic relationship between the oxidation degree of ECNFs and their electrocapacitive performance, and present a detailed study on the electronic and crystalline structures of ECNFs to elucidate the origin of this non-monotonic relation. The ECNFs with an optimized oxidation level show ultrahigh capacitances at high operation rates, exceptional cycling performance and an excellent energy-power combination. We have identified three key factors required for optimal energy storage performance for turbostratic carbon systems: (i) an abundance of surface oxides, (ii) microstructural integrity and (iii) an appropriate interlayer spacing.

show abstract

Section: Introductionmentioning

confidence: 99%

Microwave-Assisted Oxidation of Electrospun Turbostratic Carbon Nanofibers for Tailoring Energy Storage Capabilities

Mao

Yang

et al. 2015

Chem. Mater.

View full text Add to dashboard Cite

show abstract

“…260 nm under 700 °C. 13 Later, Li et al showed a high temperature method to produce carbon microsphere with size of ca. 1.2 mm at 800-1000 °C.…”

Section: -11mentioning

confidence: 99%

A Novel Method for the Fabrication of Monodispersed Carbon Nanospheres and Their Crosslinked Forms

Im¹,

Lee²,

Li³

et al. 2014

Bulletin of the Korean Chemical Society

View full text Add to dashboard Cite

Monodispersed carbon nanospheres (CNSs) were fabricated by a novel method and their structural properties were investigated. CNSs were prepared by the pyrolysis of nanospherical polystyrenes (PS). With the coating of SiO 2 shell, PS particles were effectively separated during pyrolysis process which resulted to CNSs with an average diameter of 40 nm. Moreover, CNSs could be crosslinked with each other through the bondings between the functional groups on their surfaces. Morphology of the fabricated carbon spheres and their crosslinked form were characterized by X-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), and fourier transform infrared spectroscopy (FT-IR).

show abstract

“…In line with that, differential pore volume distribution of the spheres by DFT has been calculated, suggesting the presence of ultramicropores (see SI 8, ESI †). [42][43][44] One of the most important fields of application of CS and related nanomaterials is the energy storage and conversion. 45,46 Among others, supercapacitors (SCs) are attracting increasing attention due to their potential to deliver high power densities in short periods of time with high cyclability and durability.…”

Section: Resultsmentioning

confidence: 99%

CVD synthesis of carbon spheres using NiFe-LDHs as catalytic precursors: structural, electrochemical and magnetoresistive properties

et al. 2016

View full text Add to dashboard Cite

The gram-scale synthesis of carbon spheres with a diameter of ca. 740 nm has been achieved by means of a chemical vapour deposition method using NiFe-layered double hydroxides as a solid catalytic precursor. The presence of the catalyst (FeNi 3 ) allows controlling the final size distribution, resulting in a monodisperse sample. Their structural properties exhibited a high degree of graphitization according to their I D /I G ratio. In addition, their morphological features were unveiled by FIB-SEM and HRTEM, showing that they are formed by solid inner cores, and presenting labile chain-like structures due to accretion procedures. The solution and posterior sonication of the samples in toluene gave rise to the well-defined isolated spheres. The textural and electrochemical properties of the spheres have been tested showing non-mesoporous structures with a good behaviour as electrode materials for supercapacitors due to the presence of redox functionalities on their surface. Finally, magneto-transport measurements have been carried out, demonstrating semiconductor behaviour, as well as a positive magnetoresistance effect (ca. 72%) for the lowest studied temperature (2 K).

show abstract

Nitrogen-containing carbon spheres with very large uniform mesopores: The superior electrode materials for EDLC in organic electrolyte

Cited by 334 publications

References 31 publications

Microwave-Assisted Oxidation of Electrospun Turbostratic Carbon Nanofibers for Tailoring Energy Storage Capabilities

Microwave-Assisted Oxidation of Electrospun Turbostratic Carbon Nanofibers for Tailoring Energy Storage Capabilities

A Novel Method for the Fabrication of Monodispersed Carbon Nanospheres and Their Crosslinked Forms

CVD synthesis of carbon spheres using NiFe-LDHs as catalytic precursors: structural, electrochemical and magnetoresistive properties

Contact Info

Product

Resources

About