Key issues facing electrospun carbon nanofibers in energy applications: on-going approaches and challenges

Recent advances in the on-going approaches for activating electrospun carbon nanofibers and addressing the key issues faced are critically examined in connection with their electrochemical performance as supercapacitor electrodes.

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Recent advances in vanadium-based materials for aqueous metal ion batteries: design of morphology and crystal structure, evolution of mechanisms and electrochemical performance

Energy Storage Materials ◽

10.1016/j.ensm.2021.05.004 ◽

2021 ◽

Author(s):

Fan Lanlan ◽

Li Zhenhuan ◽

Deng Nanping

Keyword(s):

Crystal Structure ◽

Electrochemical Performance ◽

Metal Ion ◽

Structure Evolution ◽

Recent Advances

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Recent advances in silver bromide-based Z-scheme photocatalytic systems for environmental and energy applications: A review

Journal of Environmental Chemical Engineering ◽

10.1016/j.jece.2021.105157 ◽

2021 ◽

Vol 9 (2) ◽

pp. 105157 ◽

Cited By ~ 1

Author(s):

Sheetal Sharma ◽

Vishal Dutta ◽

Pankaj Raizada ◽

Ahmad Hosseini-Bandegharaei ◽

Vijay Kumar Thakur ◽

...

Keyword(s):

Silver Bromide ◽

Energy Applications ◽

Recent Advances

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Investigation on the Mass Distribution and Chemical Compositions of Various Ionic Liquids-Extracted Coal Fragments and Their Effects on the Electrochemical Performance of Coal-Derived Carbon Nanofibers (CCNFs)

Nanomaterials ◽

10.3390/nano11030664 ◽

2021 ◽

Vol 11 (3) ◽

pp. 664

Author(s):

Shuai Tan ◽

Theodore John Kraus ◽

Mitchell Ross Helling ◽

Rudolph Kurtzer Mignon ◽

Franco Basile ◽

...

Keyword(s):

Ionic Liquids ◽

Electrochemical Performance ◽

Carbon Nanofibers ◽

Mass Distribution ◽

Electrode Materials ◽

Gas Chromatography Mass Spectrometry ◽

Electrochemical Performances ◽

Diffusion Resistance ◽

Chemical Compositions ◽

Holistic Understanding

Coal-derived carbon nanofibers (CCNFs) have been recently found to be a promising and low-cost electrode material for high-performance supercapacitors. However, the knowledge gap still exists between holistic understanding of coal precursors derived from different solvents and resulting CCNFs’ properties, prohibiting further optimization of their electrochemical performance. In this paper, assisted by laser desorption/ionization (LDI) and gas chromatography–mass spectrometry (GC–MS) technologies, a systematic study was performed to holistically characterize mass distribution and chemical composition of coal precursors derived from various ionic liquids (ILs) as extractants. Sequentially, X-ray photoelectron spectroscopy (XPS) revealed that the differences in chemical properties of various coal products significantly affected the surface oxygen concentrations and certain species distributions on the CCNFs, which, in turn, determined the electrochemical performances of CCNFs as electrode materials. We report that the CCNF that was produced by an oxygen-rich coal fragment from C6mimCl ionic liquid extraction showed the highest concentrations of quinone and ester groups on the surface. Consequentially, C6mimCl-CCNF achieved the highest specific capacitance and lowest ion diffusion resistance. Finally, a symmetric carbon/carbon supercapacitor fabricated with such CCNF as electrode delivered an energy density of 21.1 Wh/kg at the power density of 0.6 kW/kg, which is comparable to commercial active carbon supercapacitors.

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