Electrochemical characteristics of activated carbon/Ppy electrode combined with P(VdF-co-HFP)/PVP for EDLC

2004 ◽  
Vol 50 (2-3) ◽  
pp. 863-872 ◽  
Author(s):  
Kyong-Min Kim ◽  
Jin-Woo Hur ◽  
Se-Il Jung ◽  
An-Soo Kang
Keyword(s):  
Activated Carbon ◽  
Electrochemical Characteristics

scholarly journals Sago Waste Based Activated Carbon Film as an Electrode Material for Electric Double Layer Capacitor

2010 ◽  
Vol 4 (1) ◽  
pp. 117-124 ◽  
Author(s):  
H. Aripin ◽  
L. Lestari ◽  
D. Ismail ◽  
S. Sabchevski
Keyword(s):  
Activated Carbon ◽  
Double Layer ◽  
Electrode Material ◽  
Electric Double Layer ◽  
Specific Capacity ◽  
Carbon Film ◽  
Electrochemical Characteristics ◽  
Double Layer Capacitor ◽  
Sago Waste ◽  
Double Layer Capacitors

In this feasibility study a novel prospective electrode material for electric double layer capacitors (EDLC) has been investigated. This promising material is activated carbon (AC) film produced using sago waste as a precursor. Important parameters of the technological process are the KOH to charcoal ratio and the content of the polytetrafluoroethylene (PTFE) binder. The influence of these parameters on the microtexture and pore structure and on the electrochemical characteristics of the AC films has been studied in detail. The measured specific surface area (SSA) of the samples is in the range from 212 to 1498 m2/g. It has been found that the presence of micropores increases the specific capacity while the presence of the mesopores acts in the opposite direction, because these mesopores are too wide in diameter for aqueous electrolyte. The specific capacitance of the studied samples has been found to be in the range from 16 to 64 F/g.

Structural and Electrochemical Characteristics of Activated Carbon Derived from Lignin-Rich Residue

2018 ◽  
Vol 7 (2) ◽  
pp. 2471-2482 ◽  
Author(s):  
Joah Han ◽  
So-Yeon Jeong ◽  
Jae Hoon Lee ◽  
Joon Weon Choi ◽  
Jae-Won Lee ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Electrochemical Characteristics

Electrochemical Characteristics and Microstructures of Activated Carbon Powder Supercapacitors for Energy Storage

2018 ◽  
Vol 930 ◽  
pp. 597-602 ◽  
Author(s):  
Tayara Correia Gonsalves ◽  
Franks Martins Silva ◽  
Ligia Silverio Vieira ◽  
Julio Cesar Serafim Casini ◽  
Rubens Nunes de Faria
Keyword(s):  
Activated Carbon ◽  
Energy Storage ◽  
Room Temperature ◽  
Electrode Materials ◽  
Freezing Point ◽  
Storage Period ◽  
Carbon Powder ◽  
Electrochemical Characteristics ◽  
Carbon Electrode ◽  
Discharge Characteristics

In recent years, extensive investigations have focused on the study and improvement of supercapacitor electrode materials. The electric devices produced with these materials are used to store energy over time periods ranging from seconds to several days. The main factor that determines the energy storage period of a supercapacitor is its self-discharge rate, i.e., the gradual decrease in electric potential that occurs when the supercapacitor terminals are not connected to either a charging circuit or electric load. Self-discharge is attenuated at lower temperatures, resulting in an increased energy storage period. This paper addresses the temperature-dependence of self-discharge via a systematic study of supercapacitors with nominal capacitances of 1.0 and 10.0 F at DC potentials of 5.5 and 2.7 V, respectively. The specific capacitances, internal resistances, and self-discharge characteristics of commercial activated carbon electrode supercapacitors were investigated. Using cyclic voltammetry, the specific capacitances were determined to be 44.4 and 66.7 Fg−1 for distinct carbon electrode supercapacitors. The self-discharge characteristics were investigated at both room temperature and close to the freezing point. The internal resistances of the supercapacitors were calculated using the discharge curves at room temperature. The microstructures of the electrode materials were determined using scanning electron microscopy.

RESOURCE STABILITY OF ACTIVATED CARBON FROM WOOD IN SUPERCAPACITORS WITH ORGANIC ELECTROLYTE

1970 ◽  
Vol 61 (11) ◽  
Author(s):  
Daria E. Vervikishko ◽  
Svetlana A. Kochanova ◽  
Alexander V. Dolzhenko ◽  
Irina A. Lipatova ◽  
Evgeny I. Shkolnikov
Keyword(s):  
Activated Carbon ◽  
Functional Groups ◽  
Activated Carbons ◽  
Autonomous Systems ◽  
Great Influence ◽  
Organic Electrolyte ◽  
Electrochemical Characteristics ◽  
High Resource ◽  
Electric Capacity ◽  
A Charge

One of advantages of supercapacitors in comparison with batteries is their potentially high resource. Resource stability, as well as a supercapacitor self-discharge, depends on many factors. The most important of them are impurities in electrolyte, carbon materials and functional groups on their surface. Authors have offered perspective carbon material – the activated carbon from wood received by thermochemical synthesis. The electric capacity around 160 F/g is reached in supercapacitors with aprotic organic electrolyte (1M tetraethylammonium tetrafluoroborate). Authors have conducted the research of properties of the developed activated carbons from wood aiming to check resource opportunities supercapacitors with aprotic organic electrolyte. Resource tests lasted more than 6.5 months. Today more than one million cycles of a charge – discharge are reached at charge current of 100 mA/cm2. It is established that functional groups have a great influence on a resource of supercapacitors. To achieve high levels of stability in the resource activation technology developed carbon is provided to minimize the number of functional groups. Heat treatment of carbons after activation in the environment of argon at the increased temperatures was in addition carried out. It is shown that electrochemical characteristics of the supercapacitor throughout resource tests are at the stable level. Thus, there are bases to believe that devices on the basis of this carbon will be able to work continuously during the large period of time that is especially important, for example, for the autonomous systems located in hard-to-reach spots.

scholarly journals Role of Nitrogen on the Porosity, Surface, and Electrochemical Characteristics of Activated Carbon

ACS Omega ◽  
2020 ◽  
Vol 5 (4) ◽  
pp. 1911-1918 ◽  
Author(s):  
Panudetch Treeweranuwat ◽  
Pawan Boonyoung ◽  
Metta Chareonpanich ◽  
Khanin Nueangnoraj
Keyword(s):  
Activated Carbon ◽  
Electrochemical Characteristics
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