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

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.

2015 ◽  
Vol 44 (33) ◽  
pp. 14604-14612 ◽  
Author(s):  
Atin Pramanik ◽  
Sandipan Maiti ◽  
Sourindra Mahanty

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).


RSC Advances ◽  
2015 ◽  
Vol 5 (34) ◽  
pp. 26666-26674 ◽  
Author(s):  
Tanmoy Rath ◽  
Patit Paban Kundu

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.


2021 ◽  
Vol 1028 ◽  
pp. 157-161
Author(s):  
Diyan Unmu Dzujah ◽  
Rahmat Hidayat ◽  
Fitrilawati ◽  
Norman Syakir

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.


RSC Advances ◽  
2015 ◽  
Vol 5 (78) ◽  
pp. 63553-63560 ◽  
Author(s):  
Guijing Liu ◽  
Lei Wang ◽  
Bo Wang ◽  
Tiantian Gao ◽  
Dianlong Wang

The prepared rGO/Co//AC asymmetric supercapacitor displayed good electrochemical performance, and it achieved a maximum energy density of 40.7 W h kg−1 at a power density of 1585.0 W kg−1.


Particuology ◽  
2014 ◽  
Vol 17 ◽  
pp. 66-73 ◽  
Author(s):  
Chunlin Zhao ◽  
Li Xing ◽  
Junhui Xiang ◽  
Lijie Cui ◽  
Jianbin Jiao ◽  
...  

Nano Letters ◽  
2016 ◽  
Vol 16 (6) ◽  
pp. 3616-3623 ◽  
Author(s):  
Yanan Chen ◽  
Kun Fu ◽  
Shuze Zhu ◽  
Wei Luo ◽  
Yanbin Wang ◽  
...  

Sign in / Sign up

Export Citation Format

Share Document