Physicochemical and Electrochemical Characterization of Salt-in-Water and Water-in-Salt Potassium and Lithium Acetate Electrolytes

Author(s):  
Mona Amiri ◽  
Daniel Bélanger

We report the physicochemical and electrochemical properties of various concentrations of potassium and lithium acetate (OAc) electrolytes from dilute to near saturation as well as mixed potassium/lithium acetate (32 m...

2020 ◽  
Vol 8 (18) ◽  
pp. 8957-8968 ◽  
Author(s):  
David Pinto ◽  
Babak Anasori ◽  
Hemesh Avireddy ◽  
Christopher E. Shuck ◽  
Kanit Hantanasirisakul ◽  
...  

MXenes demonstrate high performance in energy storage. We report the synthesis and electrochemical characterization of a novel MXene, MoxV4−xC3.


2017 ◽  
Vol 46 (15) ◽  
pp. 4943-4949 ◽  
Author(s):  
M. A. Bahri ◽  
A. Ruas ◽  
E. Labbé ◽  
P. Moisy

Electrochemical properties of plutonium (iv and vi) extracted in tributylphosphate from nitric acid aqueous solutions are explored.


2019 ◽  
Vol 5 (1) ◽  
pp. 15
Author(s):  
Sadang Husain ◽  
Muhammad Irfansyah ◽  
Agus Riyanto ◽  
Sugianto Arjo

Synthesis and characterization of the electrochemical properties of manganese ferrite nanoparticles (\ce {MnFe2O4}) from iron ore have been done. The aim of this research was to determine the potential of iron ore as a source for the manufacture of \ce {MnFe2O4} and to know electrochemical characterization. The precipitation method was used in this research. Iron ore samples were taken from Tanah Laut Regency, South Kalimantan, Indonesia. The sample of iron ore was purified first to synthesis MnFe2O4 nanoparticle. Manganese salt \ce {MnCl2} is used as a source of manganese. Characterization of samples use TEM and potentiostat. Glucose oxidase (GOD) is used as a sample to be given electrochemical properties of the sample. The GOD concentration used is 0.2; 0.4; 0.6; and 0.8 ppm. The range of \ce {MnFe2O4} nanoparticles was successfully made with sample diameters ranging from 1.5 to 12.5 nm. The current values ​​obtained on \ce {MnFe2O4} nanoparticles range from $0.226 - 0.322$ mA. The sensitivity of \ce {MnFe2O4} nanoparticles is around 0.16 mA/ppm. The higher the concentration used, the greater the current produced.


e-Polymers ◽  
2011 ◽  
Vol 11 (1) ◽  
Author(s):  
Duk-Rye Chang ◽  
Gi-Seok Heo

AbstractCarbon nanofibers were fabricated by electrospinning with various concentrations of MnO2, carbonization and activation processing for supercapacitor applications. Microstructure and electrochemical properties were characterized by scanning electron microscopy (SEM), the 4-point probe method, and a battery cycler system. It was observed that 8-20 wt.% MnO2/PAN nanofibers had 190- 260 nm diameters. The diameter decreased with increasing MnO2 concentration, but it increased for concentrations greater than 16 wt.%. The 16 wt.% MnO2 solution produced the nanofibers with the smallest diameter. The nanofibers showed capacitor characteristics when fabricated into electrodes, and their electrical conductivity and capacitance increased with increasing MnO2 concentration. The 20 wt.% MnO2/PAN carbon nanofibers showed the highest electrical conductivity value (2.82×10-3 S/cm) and the highest capacitance value (186.28 F/g), which indicates their potential for development of supercapacitor electrodes.


2016 ◽  
Vol 12 (6) ◽  
pp. 602-611 ◽  
Author(s):  
O. Sotelo-Mazón ◽  
Cecilia Cuevas-Arteaga ◽  
J. Porcayo-Calderón ◽  
G. Izquierdo-Montalvo

Membranes ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 11
Author(s):  
Damian Dziubak ◽  
Kamil Strzelak ◽  
Slawomir Sek

Supported lipid membranes are widely used platforms which serve as simplified models of cell membranes. Among numerous methods used for preparation of planar lipid films, self-assembly of bicelles appears to be promising strategy. Therefore, in this paper we have examined the mechanism of formation and the electrochemical properties of lipid films deposited onto thioglucose-modified gold electrodes from bicellar mixtures. It was found that adsorption of the bicelles occurs by replacement of interfacial water and it leads to formation of a double bilayer structure on the electrode surface. The resulting lipid assembly contains numerous defects and pinholes which affect the permeability of the membrane for ions and water. Significant improvement in morphology and electrochemical characteristics is achieved upon freeze–thaw treatment of the deposited membrane. The lipid assembly is rearranged to single bilayer configuration with locally occurring patches of the second bilayer, and the number of pinholes is substantially decreased. Electrochemical characterization of the lipid membrane after freeze–thaw treatment demonstrated that its permeability for ions and water is significantly reduced, which was manifested by the relatively high value of the membrane resistance.


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