The recent tendency in the battery field toward use of aqueous electrolytes stimulated several studies searching for compatible electrode materials and charge carriers. Still, another aspect to forge ahead is fundamental understanding interfacial processes occurring at electrode/electrolyte interface. To this end, we investigated properties a model LiCoO2 composite Li2SO4 electrolyte through ex...

Orthogonal electrodes have been reported to produce high velocity microflows when excited by ac signals, showing potential for micropumping applications. This paper investigates the microflow reversal phenomena in such orthogonal electrode micropumps. Three types of microflow fields were observed by changing the applied electric signals. Three ac electrokinetic processes, capacitive electrode p...

In this paper the method of fast impedance spectroscopy of technical objects with high impedance (|Z x | ≥ 1 GΩ) is evaluated by means of simulation and a practical experiment. The method is based on excitation of an object with a sinc signal and sampling the response signals proportional to current flowing through and voltage across the measured impedance. The object’s impedance spectrum is ob...

In the present research, a simple electrochemical sensor based on carbon paste electrode (CPE) modified with ZnO-Zn2SnO4-SnO2 and graphene (ZnO-Zn2SnO4-SnO2/Gr/CPE) was developed for direct, simultaneous individual measurement of Acetaminophen (AC), Caffeine (Caf) Ascorbic acid (AA). The synthesized nanomaterials were investigated using scanning electron microscopy, X-ray Diffraction, Fourier-t...

as an alternative to chromate conversion coatings, rare-earth coatings especially cerium, because of the low toxicity, have attracted considerable attention. using dip immersion method, cerium-based conversion coating was deposited on aluminum 2024. corrosion resistance was studied in 3.5 wt.% nacl solution using potentiodynamic polarization, electrochemical impedance spectroscopy, and surface ...