Tantalum pentoxide functionalized nitrogen-doped reduced graphene oxide as a competent electrode material for enhanced specific capacitance in a hybrid supercapacitor device

2021 ◽  
Vol 861 ◽  
pp. 158572
Author(s):  
T.N. Vinuth Raj ◽  
Priya A. Hoskeri ◽  
H.B. Muralidhara ◽  
B.P. Prasanna ◽  
K. Yogesh Kumar ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Specific Capacitance ◽  
Reduced Graphene Oxide ◽  
Electrode Material ◽  
Tantalum Pentoxide ◽  
Hybrid Supercapacitor ◽  
Nitrogen Doped ◽  
Reduced Graphene

Nitrogen-Enriched Reduced Graphene Oxide for High Performance Supercapacitor Electrode

2020 ◽  
Vol 20 (8) ◽  
pp. 4854-4859 ◽  
Author(s):  
Lei Chen ◽  
Xu Chen ◽  
Yaqiong Wen ◽  
Bixia Wang ◽  
Yangchen Wu ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Graphene Oxide ◽  
Specific Capacitance ◽  
Reduced Graphene Oxide ◽  
Electrode Material ◽  
High Performance ◽  
Electrode Materials ◽  
Electrochemical Impedance ◽  
Oxide Electrode ◽  
Reduced Graphene

Nitrogen-enriched reduced graphene oxide electrode material can be successfully prepared through a simple hydrothermal method. The morphology and microstructure of ready to use electrode material is measured by field emission scanning electron microscopy (FESEM), high-resolution transmission electron microscopy (HRTEM) and X-ray diffraction (XRD). Physical characterizations revealed that nitrogen-enriched reduced graphene oxide electrode material possessed high specific surface area of 429.6 m2 · g−1, resulting in high utilization of electrode materials with electrolyte. Electrochemical performance of nitrogen-enriched reduced graphene oxide electrode was also investigated by cyclic voltammetry (CV), galvanostatic charge/discharge measurements and electrochemical impedance spectroscopy (EIS) in aqueous in 6 M KOH with a three-electrode system, which displayed a high specific capacitance about 223.5 F · g−1 at 1 mV · s−1. More importantly, nitrogenenriched reduced graphene oxide electrode exhibited outstanding stability with 100% coulombic efficiency and with no specific capacitance loss under 2 A · g−1 after 10000 cycles. The supercapacitive behaviors indicated that nitrogen-enriched reduced graphene oxide can be a used as a promising electrode for high-performance super-capacitors.

NiMoO4/reduced graphene oxide composite as an electrode material for hybrid supercapacitor

2021 ◽  
Vol 135 ◽  
pp. 106078
Author(s):  
Dinesh Muthu ◽  
Stella Vargheese ◽  
Yuvaraj Haldorai ◽  
Ramasamy Thangavelu Rajendra Kumar
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Electrode Material ◽  
Hybrid Supercapacitor ◽  
Oxide Composite ◽  
Reduced Graphene

A polypyrrole-adorned, self-supported, pseudocapacitive zinc vanadium oxide nanoflower and nitrogen-doped reduced graphene oxide-based asymmetric supercapacitor device for power density applications

2020 ◽  
Vol 44 (3) ◽  
pp. 1063-1075 ◽  
Author(s):  
Lopamudra Halder ◽  
Amit Kumar Das ◽  
Anirban Maitra ◽  
Aswini Bera ◽  
Sarbaranjan Paria ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Vanadium Oxide ◽  
Reduced Graphene Oxide ◽  
Power Density ◽  
Electrode Material ◽  
Asymmetric Supercapacitor ◽  
Supercapacitor Electrode ◽  
Nitrogen Doped ◽  
Reduced Graphene ◽  
Battery Material

Herein, a distinctive approach has been implemented for exploiting a typical battery material zinc vanadium oxide (ZV) as a supercapacitor electrode material.

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