Fabrication of Co3O4 nanoparticles decorated porous activated carbon electrode for the electrochemical detection of 4-nitrophenol

2021 ◽  
Author(s):  
Benadict Joseph Xavier ◽  
Christy Ezhilarasi J ◽  
Sea-Fue Wang ◽  
Elanthamilan Elaiyappillai ◽  
Sriram Balasubramanian ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Activated Carbon ◽  
Electrochemical Detection ◽  
Transition Metal Oxides ◽  
Electrode Materials ◽  
Activated Carbons ◽  
State Of The Art ◽  
Co3o4 Nanoparticles ◽  
Carbon Electrode ◽  
Porous Activated Carbon

State-of-the-art, electrochemical applications recently employ various activated carbons combined with transition metal oxides as electrode materials; exhibit superior conductivity and tailored porosity to offer both rapid electron transfer. In this...

scholarly journals Energy storage applications of activated carbons: supercapacitors and hydrogen storage

2014 ◽  
Vol 7 (4) ◽  
pp. 1250-1280 ◽  
Author(s):  
Marta Sevilla ◽  
Robert Mokaya
Keyword(s):  
Energy Storage ◽  
Hydrogen Storage ◽  
Electrode Materials ◽  
Activated Carbons ◽  
State Of The Art ◽  
The State ◽  
Hydrogen Storage Materials ◽  
Storage Materials ◽  
Energy Storage Applications

This review presents the state-of-the-art with respect to synthesis of activated carbons, and their use as electrode materials in supercapacitors and as hydrogen storage materials.

Quinone/hydroquinone redox couple as a source of enormous capacitance of activated carbon electrodes

2013 ◽  
Vol 1505 ◽  
Author(s):  
Krzysztof Fic ◽  
Mikolaj Meller ◽  
Grzegorz Lota ◽  
Elzbieta Frackowiak
Keyword(s):  
Activated Carbon ◽  
Redox Reactions ◽  
Electrode Materials ◽  
Activated Carbons ◽  
Hydroxyl Group ◽  
Carbon Surface ◽  
Carbon Electrodes ◽  
Main Subject ◽  
Solution Ph ◽  
Reversible Redox

ABSTRACTThe main subject of this paper is to examine and to evaluate the capacitive behaviour of activated carbon electrodes electrochemically decorated by quinone-type functional groups. For this purpose, different electrolytes, i.e. hydroquinone, catechol and resorcinol at the concentration of 0.38 mol L-1, dissolved in 1 mol L-1 H2SO4, 1 mol L-1 Li2SO4 and 6 mol L-1 KOH were used. These electrolytes could generate electroactive groups (able to undergo reversible redox reactions) on the surface of electrode material. Apart from typical adsorption of the mentioned dihydroxybenzenes, so called grafting could occur and might cause generation of quinone|hydroquinone functionals on carbon surface. As an effect of functional reversible redox reaction, additional capacitance value, called pseudocapacitance, could be achieved. Hence, besides typical charge originating from charging/discharging of the electrical double layer on the electrode/electrolyte interface, additional capacitance comes also from faradaic reactions. Activated carbons are the most promising electrode materials for this purpose; apart from great physicochemical properties, they are characterized by well-developed specific surface area over 2000 m2 g-1 which results in high capacitance values.In the manuscript the influence of the hydroxyl group location as well as electrolyte solution pH on the electrochemical performance of the electrode is discussed.

Palladium Nanoparticle Incorporated Porous Activated Carbon: Electrochemical Detection of Toxic Metal Ions

2016 ◽  
Vol 8 (2) ◽  
pp. 1319-1326 ◽  
Author(s):  
Pitchaimani Veerakumar ◽  
Vediyappan Veeramani ◽  
Shen-Ming Chen ◽  
Rajesh Madhu ◽  
Shang-Bin Liu
Keyword(s):  
Activated Carbon ◽  
Metal Ions ◽  
Electrochemical Detection ◽  
Toxic Metal ◽  
Palladium Nanoparticle ◽  
Toxic Metal Ions ◽  
Porous Activated Carbon

Electronically conducting polymers and activated carbon: Electrode materials in supercapacitor technology

1996 ◽  
Vol 8 (4) ◽  
pp. 331-334 ◽  
Author(s):  
Marina Mastragostino ◽  
Catia Arbizzani ◽  
Luca Meneghello ◽  
Ruggero Paraventi
Keyword(s):  
Activated Carbon ◽  
Conducting Polymers ◽  
Electrode Materials ◽  
Carbon Electrode ◽  
Electronically Conducting Polymers

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.

scholarly journals State-of-the-Art Electrode Materials for Sodium-Ion Batteries

Materials ◽  
2020 ◽  
Vol 13 (16) ◽  
pp. 3453 ◽  
Author(s):  
Alain Mauger ◽  
Christian M. Julien
Keyword(s):  
Transition Metal Oxides ◽  
Solid Electrolytes ◽  
Electrode Materials ◽  
State Of The Art ◽  
Lithium Ion ◽  
Sodium Ion ◽  
Sodium Ion Batteries ◽  
Exponential Increase ◽  
Prussian Blue Analogs ◽  
Made In

Sodium-ion batteries (SIBs) were investigated as recently as in the seventies. However, they have been overshadowed for decades, due to the success of lithium-ion batteries that demonstrated higher energy densities and longer cycle lives. Since then, the witness a re-emergence of the SIBs and renewed interest evidenced by an exponential increase of the publications devoted to them (about 9000 publications in 2019, more than 6000 in the first six months this year). This huge effort in research has led and is leading to an important and constant progress in the performance of the SIBs, which have conquered an industrial market and are now commercialized. This progress concerns all the elements of the batteries. We have already recently reviewed the salts and electrolytes, including solid electrolytes to build all-solid-state SIBs. The present review is then devoted to the electrode materials. For anodes, they include carbons, metal chalcogenide-based materials, intercalation-based and conversion reaction compounds (transition metal oxides and sulfides), intermetallic compounds serving as functional alloying elements. For cathodes, layered oxide materials, polyionic compounds, sulfates, pyrophosphates and Prussian blue analogs are reviewed. The electrode structuring is also discussed, as it impacts, importantly, the electrochemical performance. Attention is focused on the progress made in the last five years to report the state-of-the-art in the performance of the SIBs and justify the efforts of research.

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