scholarly journals Facile Electrodeposition of Poly(3,4-ethylenedioxythiophene) on Poly(vinyl alcohol) Nanofibers as the Positive Electrode for High-Performance Asymmetric Supercapacitor

Energies ◽  
2019 ◽  
Vol 12 (17) ◽  
pp. 3382 ◽  
Author(s):  
Nivekthiren Dasdevan ◽  
Muhammad Amirul Aizat Mohd Abdah ◽  
Yusran Sulaiman
Keyword(s):  
Vinyl Alcohol ◽  
High Performance ◽  
Synergistic Effects ◽  
Positive Electrode ◽  
Energy Output ◽  
Specific Power ◽  
Poly Vinyl Alcohol ◽  
Asymmetric Supercapacitor ◽  
Reduced Graphene ◽  
Output Efficiency

Poly(vinyl alcohol)/poly(3,4-ethylenedioxythiophene) (PVA/PEDOT) nanofibers were synthesized as a positive electrode for high-performance asymmetric supercapacitor (ASC). PVA/PEDOT nanofibers were prepared through electrospinning and electrodeposition meanwhile reduced graphene oxide (rGO) was obtained by electrochemical reduction. The PVA/PEDOT nanofibers demonstrated cauliflower-like morphology showing that PEDOT was uniformly coated on the smooth cross-linking structure of PVA nanofibers. In addition, the ASC showed a remarkable energy output efficiency by delivering specific energy of 21.45 Wh·kg−1 at a specific power of 335.50 W·kg−1 with good cyclability performance (83% capacitance retained) after 5000 CV cycles. The outstanding supercapacitive performance is contributed from the synergistic effects of both PVA/PEDOT//rGO, which gives promising materials for designing high-performance supercapacitor applications.

scholarly journals Poly(3,4-ethylenedioxythiophene)-reduced graphene oxide/copper-based metal-organic frameworks as a high-performance symmetrical supercapacitor device

2021 ◽  
Author(s):  
Dharshini Mohanadas ◽  
Muhammad Amirul Aizat Mohd Abdah ◽  
Nur Hawa Nabilah Azman ◽  
Thahira B.S.A. Ravoof ◽  
Yusran Sulaiman
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
High Performance ◽  
Metal Organic Framework ◽  
Specific Power ◽  
X Ray Diffraction ◽  
Reduced Graphene ◽  
Metal Organic ◽  
Energy Storage Material ◽  
Organic Framework

Abstract A novel poly(3,4-ethylenedioxythiophene)-reduced graphene oxide/copper-based metal-organic framework (PrGO/HKUST-1) has been successfully fabricated by incorporating electrochemically synthesized poly(3,4-ethylenedioxythiophene)-reduced graphene oxide (PrGO) and hydrothermally synthesized copper-based metal-organic framework (HKUST-1). The field emission scanning microscopy (FESEM) and elemental mapping analysis revealed an even distribution of poly(3,4-ethylenedioxythiophene) (PEDOT), reduced graphene oxide (rGO) and HKUST-1. The crystalline structure and vibration modes of PrGO/HKUST-1 was validated utilizing X-ray diffraction (XRD) as well as Raman spectroscopy, respectively. A remarkable specific capacitance (360.5 F/g) was obtained for PrGO/HKUST-1 compared to HKUST-1 (103.1 F/g), PrGO (98.5 F/g) and PEDOT (50.8 F/g) using KCl/PVA as a gel electrolyte. Moreover, PrGO/HKUST-1 composite with the longest charge/discharge time displayed excellent specific energy (21.0 Wh/kg), specific power (479.7 W/kg) and outstanding cycle life (95.5%) over 4000 cycles. Thus, the PrGO/HKUST-1 can be recognized as a promising energy storage material.

Electrochemical performance of an asymmetric supercapacitor based on graphene and cobalt molybdate electrodes

RSC Advances ◽  
2015 ◽  
Vol 5 (21) ◽  
pp. 16319-16327 ◽  
Author(s):  
Ganesh Kumar Veerasubramani ◽  
Karthikeyan Krishnamoorthy ◽  
Sang Jae Kim
Keyword(s):  
Graphene Oxide ◽  
Electrochemical Performance ◽  
Reduced Graphene Oxide ◽  
Negative Electrode ◽  
Positive Electrode ◽  
Asymmetric Supercapacitor ◽  
Asymmetric Supercapacitors ◽  
Reduced Graphene ◽  
Cobalt Molybdate

In this article, we report the fabrication and electrochemical performance of asymmetric supercapacitors (ASCs) based on a reduced graphene oxide (rGO) negative electrode and a cobalt molybdate (CoMoO4) positive electrode.

Graphene-reinforced poly(vinyl alcohol) electrospun fibers as building blocks for high performance nanocomposites

RSC Advances ◽  
2015 ◽  
Vol 5 (103) ◽  
pp. 85009-85018 ◽  
Author(s):  
Sajjad Ghobadi ◽  
Sina Sadighikia ◽  
Melih Papila ◽  
Fevzi Çakmak Cebeci ◽  
Selmiye Alkan Gürsel
Keyword(s):  
Polymer Matrix ◽  
Vinyl Alcohol ◽  
High Performance ◽  
Building Blocks ◽  
Poly Vinyl Alcohol ◽  
Electrospun Fibers ◽  
Matrix Solution ◽  
High Level

Graphene-containing fibrous structures with a high level of affinity towards a polymer matrix solution have been proved to be promising for high performance macroscopic nanocomposite reinforcement purposes.

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