scholarly journals Fe1−xS Modified TiO2 NPs Embedded Carbon Nanofiber Composite via Electrospinning: A Potential Electrode Material for Supercapacitors

Molecules ◽  
2020 ◽  
Vol 25 (5) ◽  
pp. 1075 ◽  
Author(s):  
Bishweshwar Pant ◽  
Hem Raj Pant ◽  
Mira Park
Keyword(s):  
Electrode Material ◽  
Carbon Nanofiber ◽  
Argon Atmosphere ◽  
Electrochemical Studies ◽  
Supercapacitor Electrode ◽  
Electrospinning Technique ◽  
Nanofiber Composite ◽  
Tio2 Nps ◽  
Potential Electrode ◽  
State Of Art

Fe1−xS-TiO2 nanoparticles embedded carbon nanofibers (Fe1−xS-TiO2/CNFs) composite as a supercapacitor electrode material has been reported in the present work. The Fe1−xS-TiO2/CNFs composite was fabricated by electrospinning technique followed by carbonization under argon atmosphere and characterized by the state-of-art techniques. The electrochemical studies were carried out in a 2 M KOH electrolyte solution. The synthesized material showed a specific capacitance value of 138 F/g at the current density of 1 A/g. Further, the capacitance retention was about 83%. The obtained results indicate that the Fe1−xS-TiO2/CNFs composite can be recognized as electrode material in supercapacitor.

scholarly journals TiO2 NPs Assembled into a Carbon Nanofiber Composite Electrode by a One-Step Electrospinning Process for Supercapacitor Applications

Polymers ◽  
2019 ◽  
Vol 11 (5) ◽  
pp. 899 ◽  
Author(s):  
Bishweshwar Pant ◽  
Mira Park ◽  
Soo-Jin Park
Keyword(s):  
Electrode Material ◽  
Carbon Nanofiber ◽  
Titanium Dioxide Nanoparticles ◽  
Scale Up ◽  
Carbon Composite ◽  
Electrospinning Process ◽  
Tio2 Nps ◽  
Electrospinning Method ◽  
One Step ◽  
Supercapacitor Applications

In this study, we have synthesized titanium dioxide nanoparticles (TiO2 NPs) into carbon nanofiber (NFs) composites by a simple electrospinning method followed by subsequent thermal treatment. The resulting composite was characterized by state-of-the-art techniques and exploited as the electrode material for supercapacitor applications. The electrochemical behavior of the as-synthesized TiO2 NPs assembled into carbon nanofibers (TiO2-carbon NFs) was investigated and compared with pristine TiO2 NFs. The cyclic voltammetry and charge–discharge analysis of the composite revealed an enhancement in the performance of the composite compared to the bare TiO2 NFs. The as-obtained TiO2-carbon NF composite exhibited a specific capacitance of 106.57 F/g at a current density of 1 A/g and capacitance retention of about 84% after 2000 cycles. The results obtained from this study demonstrate that the prepared nanocomposite could be used as electrode material in a supercapacitor. Furthermore, this work provides an easy scale-up strategy to prepare highly efficient TiO2-carbon composite nanofibers.

Electrospun Polyacrylonitrile Carbon Nanofiber for Supercapacitor Application: A Review

2021 ◽  
Vol 40 ◽  
pp. 25-42
Author(s):  
Sumit Dubal ◽  
Sachin Chavan
Keyword(s):  
Fossil Fuels ◽  
Carbon Nanofiber ◽  
High Energy ◽  
Environmental Crisis ◽  
Literature Study ◽  
Electrospinning Technique ◽  
Characterization Methods ◽  
Supercapacitor Application ◽  
Storage Devices ◽  
Potential Electrode

The need for the development of renewable energy harvesting and storage devices is on the front as the world is facing an environmental crisis due to the consumption of gallons of fossil fuels. One of the promising solutions on which many researchers are concentrating is supercapacitor as it possesses high energy and power density. Current literature study focusing on developments already had in the field of manufacturing of supercapacitors using different precursors, testing conditions, fiber dimensions, and their performance analysis. Most of the studies found that Polyacrylonitrile (PAN) based electrospun carbon fiber webs is a potential electrode material for supercapacitors. The information gathered in this article is about the electrospinning technique, Surface and electrochemical characterization methods, and recent advances in their performance are highlighted. Also, enhancement in electrochemical performance through optimization of electrospinning parameter, a precursor modification by the addition of active materials (such as carbon nanotubes, metal oxides, and catalysts), heat and surface treatment followed, and optimum fibrous structures are summarized.

Fabrication and charge storage capacitance of PPY/TiO2/PPY jacket nanotube array

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Yibing Xie
Keyword(s):  
Density Of States ◽  
Electrode Material ◽  
Acidic Solution ◽  
Tube Wall ◽  
Internal Surface ◽  
Experimental Result ◽  
Charge Storage ◽  
Current Response ◽  
Supercapacitor Electrode ◽  
Nanotube Array

AbstractA PPY/TiO2/PPY jacket nanotube array was fabricated by coating PPY layer on the external and internal surface of a tube wall-separated TiO2 nanotube array. It shows coaxial triple-walled nanotube structure with two PPY nanotube layers sandwiching one TiO2 nanotube layer. PPY/TiO2/PPY reveals much higher current response than TiO2. The theoretical calculation indicates PPY/TiO2/PPY reveals higher density of states and lower band gap, accordingly presenting higher conductivity and electroactivity, which is consistent with the experimental result of a higher current response. The electroactivity is highly enhanced in H2SO4 rather than Na2SO4 electrolyte due to feasible pronation process of PPY in an acidic solution. PPY/TiO2/PPY could conduct the redox reaction in H2SO4 electrolyte which involves the reversible protonation/deprotonation and HSO4− doping/dedoping process and accordingly contributes to Faradaic pseudocapacitance. The specific capacitance is highly enhanced from 1.7 mF cm−2 of TiO2 to 123.4 mF cm−2 of PPY/TiO2/PPY at 0.1 mA cm−2 in H2SO4 electrolyte. The capacitance also declines from 123.4 to 31.7 mF cm−2 when the current density increases from 0.1 to 1 mA cm−2, presenting the rate capacitance retention of 26.7% due to the semiconductivity of TiO2. A PPY/TiO2/PPY jacket nanotube with high charge storage capacitance is regarded as a promising supercapacitor electrode material.

MOF/PEDOT/HPMo-based polycomponent hierarchical hollow micro-vesicles for high performance flexible supercapacitors

2021 ◽  
Vol 9 (5) ◽  
pp. 2948-2958
Author(s):  
Bing Wang ◽  
Shuo Liu ◽  
Lin Liu ◽  
Wen-Wei Song ◽  
Yue Zhang ◽  
...  
Keyword(s):  
Electrode Material ◽  
High Performance ◽  
Cycle Stability ◽  
Supercapacitor Electrode ◽  
Flexible Supercapacitors ◽  
High Area

The three-component PCN-224/PEDOT/PMo12 supercapacitor electrode material is designed to offer high area capacitance, good cycle stability and mechanical flexibility.

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