Synergistic Optimization of Double Layer Capacitance and Pseudocapacitance of Activated Carbon by Nickel Oxide Loading

2019 ◽  
pp. 10775-10789
Author(s):  
Shijie Li ◽  
Keyword(s):  
Activated Carbon ◽  
Nickel Oxide ◽  
Double Layer ◽  
Double Layer Capacitance

Ferrous Nitrate–Nickel Oxide (Fe(NO3)2–NiO) Nanospheres Incorporated With Carbon Black and Polyvinylidenefluoride for Supercapacitor Applications

2019 ◽  
Vol 16 (3) ◽  
Author(s):  
Aqib Muzaffar ◽  
Keerthana Muthusamy ◽  
M. Basheer Ahamed
Keyword(s):  
Nickel Oxide ◽  
Specific Capacitance ◽  
Double Layer ◽  
Electrochemical Impedance ◽  
Maximum Efficiency ◽  
Potential Range ◽  
Double Layer Capacitance ◽  
Hydrothermal Route ◽  
Sem Images ◽  
Charge Discharge

Ferrous nitrate/nickel oxide {Fe(NO3)2–NiO} nanocomposite was synthesized via two-step facile hydrothermal route. The nanocomposite exhibits crystalline structure as unveiled by X-ray diffraction (XRD) pattern, while as the scanning electron microscope (SEM) images divulge spherical morphologies for both Fe(NO3)2 as well as NiO nanoparticles differentiating from each other in size. Cyclic voltammetry (CV), galvanostatic charge–discharge (GCD), and electrochemical impedance spectroscopy (EIS) techniques were used to investigate supercapacitive behavior of the symmetrically fabricated nanocomposite electrode configuration using aqueous KOH as the electrolyte. The CV analyses demonstrate dominant electrical double layer capacitance (EDLC) behavior in the potential range of 0–1 V. From charge–discharge curves, the maximum specific capacitance calculated was 460 F g−1 corresponding to the energy density of 16 W h kg−1 at a high power density of 250 W kg−1. EIS data affiliate well with the CV and GCD results justifying the maximum contribution of specific capacitance due to double layer capacitance. The nanocomposite retained 84% of its original capacitance after 1000 cycles and yielded maximum efficiency of 78%.

scholarly journals Influence of organics adsorption on electric double layer capacitance for activated carbon electrode

TANSO ◽  
2004 ◽  
Vol 2004 (215) ◽  
pp. 255-257 ◽  
Author(s):  
Soshi Shiraishi ◽  
Takamitsu Nakajima ◽  
Hideyuki Kurihara ◽  
Jun-ichi Ozaki ◽  
Asao Oya
Keyword(s):  
Activated Carbon ◽  
Double Layer ◽  
Electric Double Layer ◽  
Carbon Electrode ◽  
Double Layer Capacitance ◽  
Electric Double Layer Capacitance

Preparation of spherical activated carbon with high electric double-layer capacitance

Carbon ◽  
2004 ◽  
Vol 42 (11) ◽  
pp. 2332-2334 ◽  
Author(s):  
Sang-Ick Lee ◽  
Satoshi Mitani ◽  
Seong-Ho Yoon ◽  
Yozo Korai ◽  
Isao Mochida
Keyword(s):  
Activated Carbon ◽  
Double Layer ◽  
Electric Double Layer ◽  
Double Layer Capacitance ◽  
Spherical Activated Carbon ◽  
Electric Double Layer Capacitance
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