scholarly journals Electrodeposition and Capacitive Behavior of Films for Electrodes of Electrochemical Supercapacitors

2010 ◽  
Vol 5 (3) ◽  
pp. 518-523 ◽  
Author(s):  
C. Shi ◽  
I. Zhitomirsky
Keyword(s):  
Electrochemical Supercapacitors ◽  
Capacitive Behavior

An evaluation of the capacitive behavior of supercapacitors as a function of the radius of cations using simulations with a constant potential method.

2022 ◽  
Author(s):  
Antenor José Paulista Neto ◽  
Débora Ariana Corrêa da Silva ◽  
Vanessa A. Gonçalves ◽  
Hudson Zanin ◽  
Renato Garcia Freitas ◽  
...  
Keyword(s):  
Molecular Dynamics ◽  
Electrostatic Interactions ◽  
Potential Method ◽  
Electrochemical Supercapacitors ◽  
Capacitive Behavior ◽  
Electrolyte Interface ◽  
Constant Potential

We report on the molecular dynamics atomistic applying the constant potential method to determine the structural and electrostatic interactions at the electrode-electrolyte interface of electrochemical supercapacitors as a function of...

Diffusion-Controlled Electrosynthesis of Nanoporous Electrodes for Electrochemical Supercapacitors

2009 ◽  
Vol 7 ◽  
pp. 87-92 ◽  
Author(s):  
Gideon Moses Jacob ◽  
Igor Zhitomirsky
Keyword(s):  
Manganese Dioxide ◽  
Cathode Surface ◽  
Electrochemical Supercapacitors ◽  
Diffusion Limitation ◽  
Porous Films ◽  
Deposition Mechanism ◽  
Capacitive Behavior ◽  
Diffusion Controlled ◽  
Controlled Deposition ◽  
Film Porosity

Nanostructured manganese dioxide films were obtained by electrosynthesis using 0.02-0.15 M KMnO4 solutions. The diffusion-controlled deposition mechanism is based on the reduction of anionic MnO4- at the cathode surface. The method allowed the fabrication of porous films for application in electrochemical supercapacitors (ES). It was shown that film porosity is beneficial for the charge transfer during deposition, crack prevention in thick films and electrolyte diffusion in fabricated ES electrodes. Porous nanostructured films showed good capacitive behavior in the 0.1 M Na2SO4 electrolyte in a voltage window of 1V. The specific capacitance decreased with increasing scan rate due to the diffusion limitation in the porous manganese dioxide electrodes

Improvement of Electrochemical Supercapacitors by Using Nanostructured Semiconductors

2018 ◽  
Vol 10 (4) ◽  
pp. 04020-1-04020-6 ◽  
Author(s):  
S. O. Vambol ◽  
◽  
I. T. Bohdanov ◽  
V. V. Vambol ◽  
Y. O. Suchikova ◽  
...  
Keyword(s):  
Electrochemical Supercapacitors ◽  
Nanostructured Semiconductors

Hierarchical Crumpled NiMn2O4@MXene Composites for High Rate Ion Transport Electrochemical Supercapacitors

2021 ◽  
Author(s):  
Hailong Yan ◽  
Jinbing Cheng ◽  
Zuxue Bai ◽  
Tao Peng ◽  
Jang-Kyo Kim ◽  
...  
Keyword(s):  
Ion Transport ◽  
Electronic Conductivity ◽  
High Rate ◽  
Surface Groups ◽  
Hydrophilic Surface ◽  
Electrochemical Supercapacitors ◽  
Excellent Performance ◽  
Volumetric Capacitance

MXenes have received great attention due to their excellent performance such as metal-like electronic conductivity, hydrophilic surface groups, and high volumetric capacitance. However, many performances of MXenes are still unsatisfied...

scholarly journals Enhanced electrochemical performances of activated carbon (AC)-nickel-metal organic framework (SIFSIX-3-Ni) composite and ion-gel electrolyte based supercapacitor

2021 ◽  
Author(s):  
Kyu Seok Lee ◽  
Ye Ji Seo ◽  
Hyeon Taek Jeong
Keyword(s):  
Activated Carbon ◽  
Electrochemical Impedance ◽  
Metal Organic Framework ◽  
Gel Electrolyte ◽  
Electrochemical Performances ◽  
Galvanostatic Charge ◽  
Nickel Metal ◽  
Capacitive Behavior ◽  
Metal Organic ◽  
Ion Gel

AbstractIn this study, we investigated that the activated carbon (AC)-based supercapacitor and introduced SIFSIX-3-Ni as a porous conducting additive to increase its electrochemical performances of AC/SIFSIX-3-Ni composite-based supercapacitor. The AC/SIFSIX-3-Ni composites are coated onto the aluminum substrate using the doctor blade method and conducted an ion-gel electrolyte to produce a symmetrical supercapacitor. The electrochemical properties of the AC/SIFSIX-3-Ni composite-based supercapacitor are evaluated through cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and galvanostatic charge/discharge tests (GCD). The AC/SIFSIX-3-Ni composite-based supercapacitor showed reasonable capacitive behavior in various electrochemical measurements, including CV, EIS, and GCD. The highest specific capacitance of the AC/SIFSIX-3-Ni composite-based supercapacitor was 129 F g−1 at 20 mV s−1.

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