scholarly journals Electrochemical Behaviors of Iron-Based Electrode Materials in Li2SO4 Aqueous Electrolyte

2010 ◽  
Keyword(s):  
Electrode Materials ◽  
Aqueous Electrolyte ◽  
Electrochemical Behaviors ◽  
Iron Based

Investigation on electrochemical behaviors of NiCo2O4 battery-type supercapacitor electrodes: the role of an aqueous electrolyte

2017 ◽  
Vol 4 (10) ◽  
pp. 1642-1648 ◽  
Author(s):  
Wei Jiang ◽  
Fang Hu ◽  
Qingyu Yan ◽  
Xiang Wu
Keyword(s):  
Electrochemical Performance ◽  
Electrode Materials ◽  
Aqueous Electrolyte ◽  
Electrochemical Behaviors

The electrochemical performance of the as-synthesized mesoporous NiCo2O4 flower-like products as electrode materials for battery-type supercapacitors is systematically investigated in detail.

scholarly journals Electrochemical Features of Symmetric and Asymmetric Supercapacitors Based on Nanostructured Mn-Cuo Electrodes

2018 ◽  
Vol 34 (6) ◽  
pp. 3058-3063 ◽  
Author(s):  
R. Suresh ◽  
K. Tamilarasan ◽  
D. Senthil Vadivu
Keyword(s):  
Current Density ◽  
Material Science ◽  
Electrode Materials ◽  
Aqueous Electrolyte ◽  
Cyclic Stability ◽  
Initial Value ◽  
Asymmetric Supercapacitors ◽  
Supercapacitive Performance ◽  
Subsequent Investigation ◽  
A Current

Progress in material science has unearthed a number of options that offer great advantages for nanostructured electrode materials which enable supercapacitors to operate efficiently. Present work involves fabrication of symmetric and asymmetric type supercapacitor devices utilizing Mn-CuO nanostructures and activated carbon (AC) as electrode materials and subsequent investigation on their supercapacitive performance in 2M KOH aqueous electrolyte. The asymmetric supercapacitor device (Mn-CuO // 2M KOH// AC) demonstrate a specific capacitance of 72 Fg-1 at a current density of 0.5 Ag-1. The cyclic stability test of this device performed at a current density of 10 Ag-1 reveals a capacitance retention of 71% of its initial value over 300 charge-discharge cycles. In addition, this device exhibits an energy density of 7.4 Whkg-1 and a power density of 127 Wkg-1.

scholarly journals Supercapacitors with graphene coated paper electrodes

2012 ◽  
Vol 27 (2) ◽  
pp. 481-485 ◽  
Author(s):  
Britta Andres ◽  
Sven Forsberg ◽  
Ana Paola Vilches ◽  
Renyun Zhang ◽  
Magnus Hummelgård ◽  
...  
Keyword(s):  
Energy Density ◽  
Specific Capacitance ◽  
Gold Nanoparticle ◽  
Electrode Materials ◽  
Aqueous Electrolyte ◽  
Minor Effect ◽  
Graphite Foil ◽  
Coated Paper ◽  
A Minor

Abstract Paper based supercapacitors are prepared by stacking a paper between two graphene electrodes and soaking these in an aqueous electrolyte. We demonstrate that supercapacitors can easily be manufactured by using proven paper technologies. Several different electrode materials were compared and two types of contacting material, silver and graphite foil were tested. The influence of the paper used as separator was also investigated. The supercapacitors with a graphene-gold nanoparticle composite as electrodes showed a specific capacitance of up to 100 F/g and an energy density of 1.27 Wh/kg. The energy density can further be increased by using other electrolytes. The silver contacts showed a pseudo capacitance, which the graphite contacts did not. The papers tested had a minor effect on the capacitance, but they have an influence on the weight and the volume of the supercapacitor.

Preparation of hierarchically porous carbon nanofoams for electrode materials of supercapacitors

RSC Advances ◽  
2015 ◽  
Vol 5 (86) ◽  
pp. 70297-70301 ◽  
Author(s):  
Yong Zhang ◽  
Youfu Wang ◽  
Aiguo Hu
Keyword(s):  
Specific Capacitance ◽  
Porous Carbon ◽  
Electrode Materials ◽  
Aqueous Electrolyte ◽  
Core Shell ◽  
Hierarchically Porous

Hierarchically porous carbon nanofoams were prepared via the formation of core–shell organosilica nanoparticles and subsequent Friedel–Crafts chemistry. The specific capacitance of them as electrode materials reached 170 F g−1 in an aqueous electrolyte.

Carbon Quantum Dots/Polyaniline Nanocomposite (S-CQD/PANI) for High Capacitive Asymmetric Supercapacitor Device

2020 ◽  
Vol 20 (6) ◽  
pp. 3785-3794 ◽  
Author(s):  
Manohar D. Mehare ◽  
Abhay D. Deshmukh ◽  
S. J. Dhoble
Keyword(s):  
Quantum Dots ◽  
Specific Capacitance ◽  
Electrode Materials ◽  
Aqueous Electrolyte ◽  
Carbon Quantum Dots ◽  
Electrode System ◽  
Potential Range ◽  
Asymmetric Supercapacitor ◽  
Supercapacitor Application ◽  
Excellent Stability

A sucrose derived carbon quantum dots/polyaniline (S-CQD/PANI) nanocomposite was synthesized as electrode materials by electrodeposition method to achieve excellent electrocapacitive performance for supercapacitor application. The morphology reveals that CQD were distributed uniformly over the surface of PANI. The highest specific capacitance obtained to be 1512.4 Fg−1 at current density 1 Ag−1 for S-CQD/PANI-25 composite in three electrode system with 1 M H2SO4 aqueous electrolyte within the potential range of −0.2 to 0.8 V. In addition asymmetric supercapacitor device was fabricated reveals highest specific capacitance of 295 Fg−1 at 1 Ag−1 with excellent stability over 1000 cycle at 3 Ag−1. Remarkably, the device delivers energy density of 40.86 Whkg−1 at power density 2000 Wkg−1.

Ionothermal synthesis of microporous and mesoporous carbon aerogels from fructose as electrode materials for supercapacitors

2016 ◽  
Vol 4 (12) ◽  
pp. 4497-4505 ◽  
Author(s):  
Xiao-Xiao Lin ◽  
Bin Tan ◽  
Lu Peng ◽  
Zhao-Feng Wu ◽  
Zai-Lai Xie
Keyword(s):  
Ionic Liquid ◽  
Porous Carbon ◽  
Mesoporous Carbon ◽  
Electrode Materials ◽  
Carbon Aerogels ◽  
Hierarchical Porous Carbon ◽  
Ionothermal Synthesis ◽  
Hierarchical Porous ◽  
One Step ◽  
Iron Based

In the present work, a series of hierarchical porous carbon monoliths were prepared from fructoseviaa one-step ionothermal carbonization approach using an iron-based ionic liquid as solvent, and a porogenic agent.

Preparation and Electrochemical Characteristics of Nitrogen-Doped Mesoporous Carbon Using Surfactants as Carbon Source

2011 ◽  
Vol 239-242 ◽  
pp. 2573-2577
Author(s):  
Guan Gui Yi ◽  
Ying Liang Liu ◽  
Yong Xiao ◽  
Wen Qi He ◽  
Shuai Zhao
Keyword(s):  
Carbon Source ◽  
Mesoporous Carbon ◽  
Electrode Materials ◽  
Electrochemical Capacitor ◽  
Electrochemical Characteristics ◽  
X Ray Diffraction ◽  
Electrochemical Behaviors ◽  
X Ray ◽  
Nitrogen Doped ◽  
Transmission Electron

Nitrogen-doped mesoporous carbons (NMC) were prepared through a facile procedure using surfactants (polyvinylpyrrolidone) as a nitrogen-containing carbon source. The NMC samples were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), and nitrogen sorption at 77 K. Cyclic voltammetry and galvanostatic charge/discharge experiments were adopted to investigate their electrochemical behaviors. The NMC-5 sample contain abundant mesopores shows the large specific capacitance up to 276 F g−1at the current of density of 0.1 A g-1. We suggest that the nitrogen-doped mesoporous carbon has potential application as electrochemical capacitor electrode materials.

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