We have developed a new approch to analysis of intermediates occurring during operation of a Li-S battery cell. We have prepared electrochemical cells with appropriate window which allowed direct monitoring of reaction products during battery operation using UV-Vis. The study led to new insights into mechanisms found in Li-S system.
COBISS.SI-ID: 5280026
In the scope of continutation of our previous article published in Nature Materials (2010) we extended our modeling to ensemble of ordinary rubber balloons that display surprising similarities to ensemble of battery particles (known as electrode). The theoretical analogy was fully confirmed by selected experimental data on ensemble of balloons.
COBISS.SI-ID: 36622597
We have studied corrosion/degradation mechanism of Pt and Pt alloy nanoparticles under the conditions of variable cell potential (simulating real conditions in fuel cells). Surprising degradation and redeposition of Pt has been observed.
COBISS.SI-ID: 5277978
We prepared smart systems on the basis of mesoporous silicate nanoparticles. The pores were filled with indicator (dye) while on the outer pore openings macromolecules were attached using special bondings. These bonds could be broken upon exposure to model chemical. This way a complete control over release of indicator could be achieved.
COBISS.SI-ID: 26701351
The properties of a novel, quaternary Ti20Nb10Zr5Ta alloy were investigated in relation to its use in biomedical applications. Its microstructure was revealed by X-ray diffraction, and composition by energy dispersive X-ray measurements. Electrochemical oxidation in three simulated physiological solutions, 0.9% NaCl, Hanks’ physiological solution and minimum essential medium, was studied and compared to the behaviour of its individual metal components. Its electrochemical behaviour is similar to those of tantalum and niobium and is superior to those of titanium and, especially, zirconium. The superior corrosion protectiveness in physiological solution was ascribed to the formation of a complex oxide layer. The incorporation of alloying oxides in the passive layer is probably the basis for the exceptional protectiveness of this alloy under simulated physiological conditions. These characteristics form the basis of a great potential for the use of Ti20Nb10Zr5Ta alloy in biomedical applications.
COBISS.SI-ID: 26780967