Reduced graphene oxide anchored Cu(OH)2as a high performance electrochemical supercapacitor

2015 ◽  
Vol 44 (33) ◽  
pp. 14604-14612 ◽  
Author(s):  
Atin Pramanik ◽  
Sandipan Maiti ◽  
Sourindra Mahanty
Keyword(s):  
Graphene Oxide ◽  
Energy Density ◽  
Reduced Graphene Oxide ◽  
Power Density ◽  
High Performance ◽  
Electrochemical Supercapacitor ◽  
Reduced Graphene ◽  
Symmetric Supercapacitor

A Cu(OH)2@RGO symmetric supercapacitor cell shows an excellent energy density and power density (84.5 Wh kg−1at 550 W kg−1).

Multilayer Reduced Graphene Oxide Deposited on Carbon Sheet as Electrodes for Supercapacitor Device

2021 ◽  
Vol 1028 ◽  
pp. 157-161
Author(s):  
Diyan Unmu Dzujah ◽  
Rahmat Hidayat ◽  
Fitrilawati ◽  
Norman Syakir
Keyword(s):  
Graphene Oxide ◽  
Energy Density ◽  
Reduced Graphene Oxide ◽  
Power Density ◽  
Large Scale ◽  
High Surface ◽  
Reduced Graphene ◽  
Symmetric Supercapacitor ◽  
Carbon Sheet ◽  
Charge Discharge

Supercapacitor or often referred to as ultracapacitor is well-known for its long-life cycle, rapid charge-discharge cycles, its ability to bridge between battery and conventional capacitor in terms of power density and energy density values [1]. Carbon allotropes like graphene, carbon nanotube, etc. are widely used as electrodes for supercapacitor mainly due to its large porosity and high electrical conductivity. Pure graphene is very difficult to be prepared in large scale, then Reduced Graphene Oxide (rGO) is used as an alternative to graphene with properties similar to graphene. On the previous work [2], it was shown that carbon sheet can act as electrodes for supercapacitor, thus depositing rGO on carbon sheet (C-rGO) as electrode of supercapacitor can be a good choice to increase the capacitance through their high surface area. This research focused on studying the characteristics of symmetric supercapacitor device with C-rGO|C-rGO device configuration in 1M KCl electrolyte system. 0.5 mg/ml GO was deposited on carbon sheet by using UV-Oven Spraying method, creating multilayer rGO with total of 70 layers. The system then measured in Galvanostatic Charge-Discharge with current variations of 1, 2, 3, 4, 5, and 10 mA. Energy storage characteristics of supercapacitor is then to be determined from the obtained measurement results. The measurement showed that the device has energy density of 0.25 Wh/kg to 0.72 Wh/kg and power density of 250 W/kg to 3,000 W/kg. Based on the value of energy density and power density showed that the device made had met requirements as supercapacitor.

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.

High performance direct hydrazine–hydrogen peroxide fuel cell using reduced graphene oxide supported Ni@M (M = Pt, Pd, Ru) nanoparticles as novel anodic electrocatalysts

2018 ◽  
Vol 42 (14) ◽  
pp. 12222-12233 ◽  
Author(s):  
Mir Ghasem Hosseini ◽  
Raana Mahmoodi ◽  
Mehdi Abdolmaleki
Keyword(s):  
Hydrogen Peroxide ◽  
Graphene Oxide ◽  
Catalytic Activity ◽  
Fuel Cell ◽  
Reduced Graphene Oxide ◽  
Power Density ◽  
High Performance ◽  
Ru Nanoparticles ◽  
Reduced Graphene ◽  
Supported Ni

Ni@Pd/rGO shows excellent catalytic activity and power density toward hydrazine oxidation in comparison with Ni@Pt/rGO and Ni@Ru/rGO.

A high performance supercapacitor based on a ceria/graphene nanocomposite synthesized by a facile sonochemical method

RSC Advances ◽  
2015 ◽  
Vol 5 (57) ◽  
pp. 46050-46058 ◽  
Author(s):  
Amin Shiralizadeh Dezfuli ◽  
Mohammad Reza Ganjali ◽  
Hamid Reza Naderi ◽  
Parviz Norouzi
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
High Performance ◽  
Nanocomposite Material ◽  
Sonochemical Method ◽  
Reduced Graphene ◽  
Symmetric Supercapacitor ◽  
Graphene Nanocomposite

In this work, we have developed a novel nanocomposite material of ceria (CeO2)–reduced graphene oxide (RGO) by a sonochemical route for application as a symmetric supercapacitor.

Reduced graphene oxide – Cu nanocomposite for the high performance electrochemical supercapacitor application

2020 ◽  
Author(s):  
Godlaveeti Sreenivasa Kumar ◽  
Hussen Maseed ◽  
Dadamiah PMD Shaik ◽  
Mahfooz Alam ◽  
S. Adinarayana Reddy ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
High Performance ◽  
Supercapacitor Application ◽  
Electrochemical Supercapacitor ◽  
Reduced Graphene

scholarly journals Sulfur-Doped Reduced Graphene Oxide for Enhanced Sodium Ion Pseudocapacitance

Nanomaterials ◽  
2019 ◽  
Vol 9 (5) ◽  
pp. 752 ◽  
Author(s):  
Yiting Wang ◽  
Mingxiang Hu ◽  
Desheng Ai ◽  
Hongwei Zhang ◽  
Zheng-Hong Huang ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Energy Density ◽  
Electrochemical Properties ◽  
Reduced Graphene Oxide ◽  
High Performance ◽  
Large Scale ◽  
Hydrothermal Process ◽  
Sodium Ion ◽  
Sulfur Source ◽  
Reduced Graphene

Sodium-ion capacitors (NICs) are considered an important candidate for large-scale energy storage in virtue of their superior energy–power properties, as well as availability of rich Na+ reserves. To fabricate high-performance NIC electrode material, a hydrothermal method was proposed to synthesize sulfur-doped reduced graphene oxide (SG), which exhibited unique layered structures and showed excellent electrochemical properties with 116 F/g capacitance at 1 A/g as the cathode of NICs from 1.6 V to 4.2 V. At the power–energy density over 5000 W/kg, the SG demonstrated over 100 Wh/kg energy density after 3500 cycles, which indicated its efficient durability and superior power–energy properties. The addition of a sulfur source in the hydrothermal process led to the higher specific surface area and more abundant micropores of SG when compared with those of reduced graphene oxide (rGO), thus SG exhibited much better electrochemical properties than those shown by rGO. Partially substituting surface oxygen-containing groups of rGO with sulfur-containing groups also facilitated the enhanced sodium-ion storage ability of SG by introducing sufficient pseudocapacitance.

A high-performance electrochemical supercapacitor based on a polyaniline/reduced graphene oxide electrode and a copper(ii) ion active electrolyte

2018 ◽  
Vol 20 (1) ◽  
pp. 131-136 ◽  
Author(s):  
Yangxi Luo ◽  
Qin’e Zhang ◽  
Wenjing Hong ◽  
Zongyuan Xiao ◽  
Hua Bai
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
High Performance ◽  
Oxide Electrode ◽  
High Capacitance ◽  
Electrochemical Supercapacitor ◽  
Reduced Graphene ◽  
Oxide Anode

High capacitance is obtained by using Cu(ii) ions as a cathodic active electrolyte to work with a polyaniline/reduced graphene oxide anode.

Reduced graphene oxide paper based nanocomposite materials for flexible supercapacitors

RSC Advances ◽  
2015 ◽  
Vol 5 (34) ◽  
pp. 26666-26674 ◽  
Author(s):  
Tanmoy Rath ◽  
Patit Paban Kundu
Keyword(s):  
Graphene Oxide ◽  
Energy Density ◽  
Electrochemical Performance ◽  
Reduced Graphene Oxide ◽  
Power Density ◽  
Nanocomposite Materials ◽  
Flexible Supercapacitor ◽  
Flexible Supercapacitors ◽  
Reduced Graphene ◽  
Graphene Oxide Paper

A flexible supercapacitor is developed by combining reduced graphene oxide (rGO), cellulose and RTIL. The device exhibited good electrochemical performance with an energy density of 6.28 W h kg−1 at a power density of 1.32 kW kg−1 in a 6 M KOH electrolyte.

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