An asymmetric supercapacitor with highly dispersed nano-Bi2O3 and active carbon electrodes

2014 ◽  
Vol 269 ◽  
pp. 129-135 ◽  
Author(s):  
Deyu Qu ◽  
Lili Wang ◽  
Dong Zheng ◽  
Liang Xiao ◽  
Bohua Deng ◽  
...  
Keyword(s):  
Active Carbon ◽  
Carbon Electrodes ◽  
Asymmetric Supercapacitor ◽  
Highly Dispersed

scholarly journals Asymmetric supercapacitor based on nanostructured graphene foam/polyvinyl alcohol/formaldehyde and activated carbon electrodes

2015 ◽  
Vol 273 ◽  
pp. 305-311 ◽  
Author(s):  
Abdulhakeem Bello ◽  
Farshad Barzegar ◽  
Damilola Momodu ◽  
Julien Dangbegnon ◽  
Fatemeh Taghizadeh ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Polyvinyl Alcohol ◽  
Carbon Electrodes ◽  
Asymmetric Supercapacitor ◽  
Graphene Foam

Balanced mesoporous nickle cobaltite-graphene and doped carbon electrodes for high-performance asymmetric supercapacitor

2017 ◽  
Vol 326 ◽  
pp. 401-410 ◽  
Author(s):  
Yan Lv ◽  
Huanlei Wang ◽  
Xiaonan Xu ◽  
Jing Shi ◽  
Wei Liu ◽  
...  
Keyword(s):  
High Performance ◽  
Carbon Electrodes ◽  
Asymmetric Supercapacitor

scholarly journals ХАРАКТЕРИЗАЦИЯ УГЛЕРОДНЫХ ЭЛЕКТРОДОВ С НАНОЧАСТИЦАМИ ГИДРОКСИД НИКЕЛЯ ДЛЯ СУПЕРКОНДЕНСАТОРОВ (CHARACTERIZATION OF CARBON ELECTRODES WITH NANOPARTICLES OF NICKEL HYDROXIDE FOR SUPERCONDENSERS)

2020 ◽  
Author(s):  
Shyryn Nurbolat ◽  
Zhanar Kalkozova ◽  
Khabibulla Abdullin
Keyword(s):  
Cyclic Voltammetry ◽  
Nickel Hydroxide ◽  
Polyvinylidene Fluoride ◽  
Carbon Materials ◽  
Specific Capacity ◽  
Carbon Electrodes ◽  
Composite Electrodes ◽  
Galvanostatic Charge ◽  
Highly Dispersed ◽  
Charge Discharge

Composite electrodes for supercapacitors have been obtained, consisting of a matrix of highly dispersed carbon materials: microcrystalline graphite and multi-walled carbon nanotubes, also a filler of nanoparticles of nickel hydroxide. Β-Co (OH) 2 and β-Ni (OH) 2 nanopowders were obtained by chemical deposition from solution. To create the electrodes, a polyvinylidene fluoride polymer in the form of a powder was used as a bonding material. The main technological stages of the manufacture of electrodes were determined, the parameters of the obtained structures were measured by the method of cyclic voltammetry and galvanostatic charge-discharge. For the manufacture of carbon electrodes, the optimal ratios of highly dispersed carbon materials, a binder polymer and a solvent have been determined to create mechanically strong layers with high conductivity and capacity. The technique of creating capacitor structures and measuring the capacitance of the obtained electrochemical capacitors has been worked out. Capacitors made of highly dispersed carbon materials showed typical rectangular curves of cyclic voltammetry and a linear decay-rise of the galvanostatic charge-discharge dependences. Typical values of specific capacity ~ 50 F / g were obtained. Composite electrodes made of nickel hydroxide nanoparticles in a carbon matrix demonstrated an increase in capacitance to ~ 180 F / g. It is shown that composite electrodes are promising for creating capacitors with a high specific capacity.

Carbon gas diffusion electrodes promoted with silver and operating on air or oxygen in alkaline medium. Physical parameters of electrodes and their components

1983 ◽  
Vol 48 (8) ◽  
pp. 2165-2174
Author(s):  
Karel Smrček ◽  
Martin Wedell ◽  
Jiří Mrha ◽  
Miroslava Musilová
Keyword(s):  
Carbon Black ◽  
Active Layer ◽  
Active Carbon ◽  
Gas Diffusion ◽  
Carbon Electrodes ◽  
Physical Parameters ◽  
Gas Diffusion Electrodes ◽  
Hydrophobic Nature ◽  
Better Than

From the ratio of hydrophobic to hydrophilic pore volumes determined after a long-term exposure of the gas or active layer to water, the strong hydrophobic nature of the teflonized carbon black contained in carbon-based gas diffusion electrodes was confirmed. This material proves better than Teflon in Teflon-bonded active carbon electrodes, whose hydrophobicity is adversely affected on heating and the mechanical strength of the layer decreases. Measurement of the penetration of water and rate of flow of oxygen revealed that the teflonized carbon black ensures two essential functions of the gas diffusion electrode: feeding the active layer with oxygen and prevention of flooding of the gas pores.

Asymmetric supercapacitor based on graphene oxide/polypyrrole composite and activated carbon electrodes

2014 ◽  
Vol 137 ◽  
pp. 26-33 ◽  
Author(s):  
Le-Qing Fan ◽  
Gui-Jing Liu ◽  
Ji-Huai Wu ◽  
Lu Liu ◽  
Jian-Ming Lin ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Activated Carbon ◽  
Carbon Electrodes ◽  
Asymmetric Supercapacitor ◽  
Polypyrrole Composite
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