Hierarchical mesoporous S,N-codoped carbon nanostructures composed of Co/Co-Cu-S/carbon nanoplate arrays on carbon nanofibers as a self-supported air cathode for long-lasting rechargeable Zn-air batteries

2021 ◽  
Author(s):  
ZhuYing Xu ◽  
Lei Yan ◽  
JunLing Shen ◽  
XiaoJing Yang ◽  
JiQiang Ning ◽  
...  
Keyword(s):  
Carbon Nanofibers ◽  
Carbon Nanostructures ◽  
Air Cathode

scholarly journals Conditions for Production of Composite Material Based on Aluminum and Carbon Nanofibers and Its Physic-Mechanical Properties

Nanomaterials ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 550 ◽  
Author(s):  
Oleg Tolochko ◽  
Tatiana Koltsova ◽  
Elizaveta Bobrynina ◽  
Andrei Rudskoy ◽  
Elena Zemtsova ◽  
...  
Keyword(s):  
Carbon Nanofibers ◽  
Carbon Nanostructures ◽  
Pure Aluminum ◽  
Metallic Matrix ◽  
Chemical Vapor ◽  
Matrix Composites ◽  
Mechanically Alloyed ◽  
Alumina Particles ◽  
Composite Microstructure

Aluminum-based metallic matrix composites reinforced by carbon nanofibers (CNFs) are important precursors for development of new light and ultralight materials with enhanced properties and high specific characteristics. In the present work, powder metallurgy technique was applied for production of composites based on reinforcement of aluminum matrices by CNFs of different concentrations (0~2.5 wt%). CNFs were produced by chemical vapor deposition (CVD) and mechanical activation. We determined that in situ synthesis of carbon nanostructures with subsequent mechanic activation provides satisfactory distribution of nanofibers and homogeneous composite microstructure. Introduction of 1 vol% of flux (0.25 NaCl + 0.25 KCl + 0.5 CaF2) during mechanic activation helps to reduce the strength of the contacts between the particles. Additionally, better reinforcement of alumina particles and strengthening the bond between CNFs and aluminum are observed due to alumina film removal. Introduction of pure aluminum into mechanically alloyed powder provides the possibility to control composite durability, plasticity and thermal conductivity.

Directly grown TiO2 nanotubes on carbon nanofibers for photoelectrochemical water splitting

MRS Advances ◽  
2016 ◽  
Vol 1 (46) ◽  
pp. 3145-3150 ◽  
Author(s):  
Hyungkyu Han ◽  
Stepan Kment ◽  
Anandarup Goswami ◽  
Ondrej Haderka ◽  
Radek Zboril
Keyword(s):  
Water Splitting ◽  
Carbon Nanofibers ◽  
Carbon Nanostructures ◽  
Carbon Nanofiber ◽  
Anatase Phase ◽  
Photoelectrochemical Cells ◽  
High Electron ◽  
Electrospinning Technique ◽  
Intimate Contact ◽  
Electron Hole Pair

ABSTRACTA variety of Titanium dioxide (TiO2) phases and nanostructures have been explored for their applications in photoelectrochemical cells (PECs) for solar-driven water splitting. In this case, anatase phase and TiO2 nanotubes offer significant advantages especially for PEC-based applications. Though, significant efforts have already been engaged to combine the advantages from both the fields, poor activation and the high electron-hole pair recombination rate of TiO2 electrodes, originating from intrinsic physicochemical properties, limits its practical use. As an alternative, we report directly grown TiO2 nanotubes (synthesized on Fluorine doped Tin Oxide (FTO) via facile electrospinning technique) on carbon nanofibers, using hydrothermal method. The hierarchical branch type configuration has an intimate contact between the TiO2 nanotube and carbon nanofiber backbone and offers higher photocatalytic activity than their respective individual components (namely TiO2 nanotubes and carbon nanostructures).

Co3O4 nanoparticles decorated carbon nanofiber mat as binder-free air-cathode for high performance rechargeable zinc-air batteries

Nanoscale ◽  
2015 ◽  
Vol 7 (5) ◽  
pp. 1830-1838 ◽  
Author(s):  
Bing Li ◽  
Xiaoming Ge ◽  
F. W. Thomas Goh ◽  
T. S. Andy Hor ◽  
Dongsheng Geng ◽  
...  
Keyword(s):  
Energy Density ◽  
Carbon Nanofibers ◽  
High Performance ◽  
Carbon Nanofiber ◽  
Rate Capability ◽  
Co3o4 Nanoparticles ◽  
Air Cathode ◽  
Free Air ◽  
Binder Free ◽  
Zinc Air Batteries

A facile method is developed for the fabrication of Co3O4 nanoparticles decorated carbon nanofibers, which enable significant improvement of rechargeable Zn-air batteries with respect to rate capability, cycling stability and energy density.

scholarly journals Flexible anode materials for lithium-ion batteries derived from waste biomass-based carbon nanofibers: I. Effect of carbonization temperature

RSC Advances ◽  
2018 ◽  
Vol 8 (13) ◽  
pp. 7102-7109 ◽  
Author(s):  
Lei Tao ◽  
Yuanbo Huang ◽  
Xiaoqin Yang ◽  
Yunwu Zheng ◽  
Can Liu ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Carbon Nanofibers ◽  
Anode Materials ◽  
Carbon Nanostructures ◽  
Lithium Ion ◽  
Carbonization Temperature ◽  
Waste Biomass ◽  
Excellent Electrochemical Performance ◽  
Energy Conversion And Storage ◽  
And Storage

Carbon nanofibers (CNFs) with excellent electrochemical performance represent a novel class of carbon nanostructures for boosting electrochemical applications, especially sustainable electrochemical energy conversion and storage applications.

Electrospun ZIF-derived cavity porous carbon nanofibers as a freestanding cathode for lithium–oxygen batteries with ultralow overpotential

Nanoscale ◽  
2021 ◽  
Author(s):  
Lichong Peng ◽  
Xiuling Zhang ◽  
Yaxin Sun ◽  
Congju Li
Keyword(s):  
Carbon Nanofibers ◽  
Porous Carbon ◽  
Specific Capacity ◽  
Hierarchical Porous Carbon ◽  
Air Cathode ◽  
Hierarchical Porous ◽  
Lithium Oxygen Batteries ◽  
Charge Discharge

We have developed a feasible approach to establish a freestanding air-cathode based on Co–Nx species trapped in hierarchical porous carbon nanofibers with reduced charge-discharge polarization (0.36 V) and high initial specific capacity (12.12 mAh cm−2) for Li–O2 batteries.

Carbon Nanostructures of Multiple-Branched Fibers Obtained from Alcohol Flames

2010 ◽  
Vol 123-125 ◽  
pp. 623-626
Author(s):  
Jin Cheng ◽  
Xiao Ping Zou ◽  
Gang Qiang Yang ◽  
Xue Ming Lü ◽  
Cui Liu Wei ◽  
...  
Keyword(s):  
Carbon Nanofibers ◽  
Growth Mechanism ◽  
Carbon Nanostructures

A set of Y-shaped carbon nanofibers obtained from ethanol flames is reported. The set of Y-shaped carbon nanofibers includes four types of morphologies. No catalyst particles could be found at the junction of Y-shaped carbon nanofibers. The growth mechanism of the multiple Y-junction carbon nanofibers is discussed.

scholarly journals Analysis of the Morphology and Structure of Carbon Deposit Formed on the Surface of Ni3Al Foils as a Result of Thermocatalytic Decomposition of Ethanol

Materials ◽  
2021 ◽  
Vol 14 (20) ◽  
pp. 6086
Author(s):  
Pawel Jóźwik ◽  
Agata Baran ◽  
Tomasz Płociński ◽  
Daniel Dziedzic ◽  
Jakub Nawała ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Carbon Nanotubes ◽  
Water Vapour ◽  
Carbon Nanofibers ◽  
Carbon Nanostructures ◽  
Carbon Deposit ◽  
X Ray ◽  
Ethanol Decomposition ◽  
Helical Carbon Nanotubes ◽  
Morphology And Structure

This article presents the results of investigations of the morphology and structure of carbon deposit formed as a result of ethanol decomposition at 500 °C, 600 °C, and 700 °C without water vapour and with water vapour (0.35 and 1.1% by volume). scanning electron microscopy (SEM) and scanning transmission electron microscopy (STEM) observations as well as energy dispersive X-ray spectrometry (EDS), X-ray diffraction (XRD), and Raman spectroscopic analyses allowed for a comprehensive characterization of the morphology and structure of cylindrical carbon nanostructures present on the surface of the Ni3Al catalyst. Depending on the reaction mixture composition (i.e., water vapour content) and decomposition temperature, various carbon nanotubes/carbon nanofibres (CNTs/CNFs) were observed: multiwalled carbon nanotubes, herringbone-type multiwall carbon nanotubes, cylindrical carbon nanofibers, platelet carbon nanofibers, and helical carbon nanotubes/nanofibres. The discussed carbon nanostructures exhibited nickel nanoparticles at the ends and in the middle part of the carbon nanostructures as catalytically active centres for efficient ethanol decomposition.

scholarly journals Growth mechanisms of carbon nanostructures with branched carbon nanofibers synthesized by plasma-enhanced chemical vapour deposition

CrystEngComm ◽  
2014 ◽  
Vol 16 (14) ◽  
pp. 2990 ◽  
Author(s):  
Zhanbing He ◽  
Jean-Luc Maurice ◽  
Chang Seok Lee ◽  
Costel Sorin Cojocaru ◽  
Didier Pribat
Keyword(s):  
Carbon Nanofibers ◽  
Chemical Vapour Deposition ◽  
Carbon Nanostructures ◽  
Vapour Deposition ◽  
Chemical Vapour ◽  
Growth Mechanisms

FORMATION OF CARBON NANOSTRUCTURES DURING PYROLYSIS OF POLYMERS

2006 ◽  
Vol 05 (04n05) ◽  
pp. 425-431 ◽  
Author(s):  
L. M. MANOCHA ◽  
JIGNESH VALAND ◽  
S. MANOCHA
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanofibers ◽  
Carbon Fibers ◽  
Carbon Nanostructures ◽  
Chemical Element ◽  
Carbon Nanomaterials ◽  
General Purpose ◽  
Nanoscience And Nanotechnology

Carbon nanomaterials have been of great interest in nanoscience and nanotechnology because of their very small size with unique properties and simplicity in structure having only one chemical element. In our laboratory, attempts were made to synthesize carbon nanomaterials through different routes such a CCVD and pyrolysis of solids carbonaceous precursors. Pyrolysis of polyacrylonitrile fibers in presence of a suitable catalyst resulted in formation of straight as well as coil type long carbon nanofibers and tubes along with general-purpose carbon fibers. Similarly, growth of carbon nanotubes was also observed in the coke deposits during pyrolysis of pitches. The yield of CNTs formed was found to increase if the precursors are impregnated with a suitable catalyst solution. These carbon nanostructures have been characterized using XRD, TEM, SEM and TGA.

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