Stabilizing NiCo2O4 hybrid architectures by reduced graphene oxide interlayers for improved cycling stability of hybrid supercapacitors

2018 ◽  
Vol 6 (44) ◽  
pp. 22106-22114 ◽  
Author(s):  
Kyu Hyun Oh ◽  
Girish Sambhaji Gund ◽  
Ho Seok Park
Keyword(s):  
Graphene Oxide ◽  
Energy Density ◽  
Reduced Graphene Oxide ◽  
Structural Stability ◽  
Nickel Foam ◽  
Cyclic Stability ◽  
Hybrid Architectures ◽  
Hybrid Supercapacitors ◽  
Nickel Cobaltite ◽  
Reduced Graphene

Nickel cobaltite@reduced graphene oxide (NiCo2O4@rGO) hybrid architectures directly deposited on nickel-foam (NF) are synthesized, showing kinetic and structural stability achieved by the rGO interlayers for improved energy density and cyclic stability of the hybrid supercapacitors.

High Volumetric Energy Density Hybrid Supercapacitors Based on Reduced Graphene Oxide Scrolls

2017 ◽  
Vol 9 (27) ◽  
pp. 22398-22407 ◽  
Author(s):  
Janardhanan R. Rani ◽  
Ranjith Thangavel ◽  
Se-I Oh ◽  
Jeong Min Woo ◽  
Nayan Chandra Das ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Energy Density ◽  
Reduced Graphene Oxide ◽  
Hybrid Supercapacitors ◽  
Reduced Graphene

Stable graphene–polyoxometalate nanomaterials for application in hybrid supercapacitors

2014 ◽  
Vol 16 (38) ◽  
pp. 20411-20414 ◽  
Author(s):  
Jullieth Suárez-Guevara ◽  
Vanesa Ruiz ◽  
Pedro Gómez-Romero
Keyword(s):  
Graphene Oxide ◽  
Energy Density ◽  
Reduced Graphene Oxide ◽  
Charge Storage ◽  
Hybrid Supercapacitors ◽  
Reduced Graphene

Stable anchoring of polyoxometalate H3PMo12O40 onto in situ reduced graphene oxide leads to a hybrid electrode with combined capacitive (GO) and faradaic (H3PMo12O40) charge storage mechanisms featuring increased capacitance, energy density and extended cyclability.

Construction of (Ni, Cu) Se2 //Reduced Graphene Oxide for High Energy Density Asymmetric Supercapacitor

2017 ◽  
Vol 4 (11) ◽  
pp. 3004-3010 ◽  
Author(s):  
Bo Chen ◽  
Yifan Tian ◽  
Zhaoxi Yang ◽  
Yunjun Ruan ◽  
Jianjun Jiang ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Energy Density ◽  
Reduced Graphene Oxide ◽  
High Energy ◽  
High Energy Density ◽  
Asymmetric Supercapacitor ◽  
Reduced Graphene

Stacking Cell Model Supercapacitor Asymmetry with Multilayer Reduced Graphene Oxide Films Fabricated Using UV Oven Spraying Technique

2021 ◽  
Vol 1028 ◽  
pp. 127-132
Author(s):  
Norman Syakir ◽  
Diyan Unmu Dzujah ◽  
Rahmat Hidayat ◽  
Fitrilawati
Keyword(s):  
Graphene Oxide ◽  
Energy Density ◽  
Single Cell ◽  
Reduced Graphene Oxide ◽  
Power Density ◽  
Cell Model ◽  
Oxide Films ◽  
Capacitance Density ◽  
Reduced Graphene ◽  
Power And Energy

We report the fabrication of multilayer reduced graphene oxide films using UV oven spraying technique for stacking cell model supercapacitor asymmetry. In report, we used nickel and carbon substrates as asymmetric current collectors. Using UV oven spraying technique, graphene oxide was coated and insitu converted on substrate surfaces forming reduced graphene oxide films that act as active materials in supercapacitor asymmetry. The films consist of 70 layers with delay time between consecutive layer prior to irradiation is 4 minutes to ensure the photoreduction take place on each layer. UV light source using Mercury lamp 125 watt at 30 cm above the substrates. The model structures consist of three cells stacked serial in 1M KCl electrolyte system. Device performance was characterized using charge-discharge technique for constant current at 2, 3, 4, 5, and 10 mA. Performance parameters are the capacitance density, power and energy density. Single cell supercapacitor has energy density in range of 0.072 Wh/kg to 0.256 Wh/kg and power density in range of 123.06 W/kg to 644.14 W/kg. Meanwhile for stacked cell supercapacitor has energy density in range of 0.377 Wh/kg to 0.755 Wh/kg, and power density in range of 169.95 W/kg to 849.79 W/kg. According to Ragone Plot, the results have feature as supercapacitor, even as single cell. Stacked cell has feature better than single cell in all parameter of capacitance density, power and energy density, and electrical working potential.

Porous reduced graphene oxide/nickel foam for highly efficient solar steam generation

2019 ◽  
Vol 30 (42) ◽  
pp. 425403 ◽  
Author(s):  
Xiaoli Shan ◽  
Yawen Lin ◽  
Aiqing Zhao ◽  
Yunsong Di ◽  
Yujing Hu ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Nickel Foam ◽  
Steam Generation ◽  
Highly Efficient ◽  
Reduced Graphene ◽  
Solar Steam Generation
Sign in / Sign up

Export Citation Format

Share Document