Homogeneous nickel metal-organic framework microspheres on reduced graphene oxide as novel electrode material for supercapacitors with outstanding performance

2020 ◽  
Vol 561 ◽  
pp. 265-274 ◽  
Author(s):  
Yuxue Zhong ◽  
Xueying Cao ◽  
Liu Ying ◽  
Liang Cui ◽  
Colin Barrow ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Electrode Material ◽  
Metal Organic Framework ◽  
Nickel Metal ◽  
Reduced Graphene ◽  
Metal Organic ◽  
Organic Framework

Preparation and Capacitance of Ni Metal Organic Framework/Reduced Graphene Oxide Composites for Supercapacitors as Nanoarchitectonics

2020 ◽  
Vol 20 (5) ◽  
pp. 2750-2754 ◽  
Author(s):  
Jeonghyun Kim ◽  
Soo-Jin Park ◽  
Sungwook Chung ◽  
Seok Kim
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Electrode Materials ◽  
Metal Organic Framework ◽  
High Specific Capacitance ◽  
Nickel Metal ◽  
Current Density Range ◽  
Reduced Graphene ◽  
Metal Organic ◽  
Organic Framework

We obtained nickel metal organic framework/reduced graphene oxide (Ni-MOF/rGO) composites in the presence of graphene oxide solution using hydrothermal method. The electrochemical performance of the composite was measured by voltammetry and charge–discharge tests. As a result of morphological and structural analysis, Ni-MOF/rGO composite was found to be a composite of cubic structure with good crystallinity and large specific surface area. The Ni-MOF/rGO composite used as the electrode material of the supercapacitor exhibited a high specific capacitance (1154.4 F/g) of 1 A/g in the 6 M KOH and 53.4% at the current density range of 0.66 to 3 A/g. A retention of capacitance of 90% after 3000 cycles was confirmed. This means that Ni-MOF/rGO composites are proper electrode materials for electrochemical energy storage systems.

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.

Interrogation of Electrochemical Performance of Reduced Graphene Oxide/Metal‐organic Framework Hybrid for Asymmetric Supercabattery Application

2020 ◽  
Vol 32 (12) ◽  
pp. 2827-2837
Author(s):  
Daniel M. Teffu ◽  
Mogwasha D. Makhafola ◽  
Miranda M. Ndipingwi ◽  
Edwin Makhado ◽  
Mpitloane J. Hato ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Electrochemical Performance ◽  
Reduced Graphene Oxide ◽  
Metal Organic Framework ◽  
Reduced Graphene ◽  
Metal Organic ◽  
Organic Framework
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