Corrosion of Sintered Materials Based on Fe, Fe-Si, Fe-Mg and Fe-Si-Ag in Different Solutions

The topic of this work is the solution of the problem of biomaterials and biocompatibility of metallic materials. The following is a procedure for the production of samples and the study of corrosion processes in various environments.

The Spread of Corrosion of the Deposited Material Using the Cold Spray Method

A layer of copper was applied to the base aluminum material using the cold spray method (cold kinetic deposition). The samples were exposed to corrosion in a salt chamber for 100, 200 and 300 hours. The change in the size of the internal and surface resistance of the samples was monitored. The corrosion results were also examined using an electron microscope.

Photoassisted Electrodeposition of Cuprous Oxide Thin Films

Well-defined cuprous oxide (Cu2O) thin films can be electrodeposited from an electrolyte containing copper (II) sulfate, lactic acid and sodium hydroxide. As Cu2O is a p-type semiconductor, it is possible to accelerate the process through illumination with light of sufficient energy (>2.1eV). Cyclic voltammetry and transient potentiostatic measurements were performed in a three-electrode setup with copper metalized wafers as a working electrode. Illumination was performed through the electrolyte, therefore absorption of light by the electrolyte had to be taken into consideration. Potentiostatic measurements with a blue LED as a light source have shown an tenfold increase in layer thickness in comparison to depositions without additional illumination. The deposited films were investigated with SEM analysis.

Environment Influence on the Properties of Functional Parts Made of HIPS Material

The aim of this work is to study the climatic influences on 3D printed materials. This study focuses on the HIPS material, which was chosen as the starting material for further studies. The material in the field of 3D printing is known for its rapid photooxidation, which results in the formation of cracks in the final product. A climatic chamber was used for degradation, in which UV light, heat and increased humidity were applied to the material. The degree of degradation was then checked by tensile test and electron microscope.

Melanin’s Semiconductor Nature and His Polymer Structure Successfully Modifies Sulfur Cathode and Increases Efficiency on Li-S Batteries

Dynamics of change in impedance spectra and electrochemical parameters of the Li-S rechargeable batteries with non-aqueous liquid electrolyte 0.7 M LiIm, 0.25 M LiNO3, DME: DOL (2:1) during storage after assembly and cycling have been shown. For modification of the Sulfur cathode, we used the different types of melanin. Our results confirm that melanin can be used as a promising component of sulfur-based electrodes

Design of Power Supply Modification of Variable Traffic Signs

This paper describes the design of mobile power sets for variable traffic signs for the use of energy storage in lead-acid battery. The supply point is intended primarily for use in powering traffic lights and mobile variable traffic signs for line traffic control. A test sample of the system was assembled, on which a series of measurements were performed to verify its functionality.

Numerical Investigation of Cathode Structure Influence on Electrochemical Behavior of Lithium-Sulfur Battery

Nowadays, Lithium-Sulfur batteries are often considered as the next generation technology for energy storage systems. This article investigates the influence of the size of sulfur clusters present in the cathode on the battery overall electrochemical behavior. The properties of the cathode are studied by cyclic voltammetry simulations using a custom numerical model implemented into Ansys Fluent. The simulation is supplemented by experimental cyclic voltammetry measurements and images from a scanning electron microscope.

The Numerical Simulation of Thermal Abuse and Runaway in Lithium Ion Battery Pack

Computer simulations today play an important role in the field of science and technology. The same is true in the field of electrochemistry, where they are used mainly to model the charging and discharging processes in various types of batteries, at the various loads and temperature processes associated with it. This article deals with the possibility of modeling thermal abuse, which subsequently leads to the thermal runaway effect in a lithium ion battery pack. The simulation is accompanied by experimental measurements and comparison of the original results from the real test and simulation.

Visualizing Impedance Spectroscopy Response for Interpretation of Collected Data

Measurements and interpretation of electrical impedance in electrochemistry and in related studies has become recently fairly commonplace as both the hardware and the interpretation software are more and more standard part of electrochemical potentiostats. With the interpretation software it is possible to model the studied system in any conceivable way, even if the physical reality may not follow the chosen model. An example is given where a circuit consisting of a capacitor with resistors in series and parallel are evaluated as if the circuit were just a pure capacitor. The method of plotting the results as complex permittivity and complex modulus is also shown.

Gel Polymer Electrolyte Based on Methyl Methacrylate for Lithium-Sulfur Batteries

Lithium-sulfur batteries are next-generation battery systems with low cost and high specific energy. However, it is necessary to solve several deficiencies of these batteries such as shuttle effect, and gel polymer electrolyte is a great candidate. These perspective materials can be used as a replacement for liquid electrolytes, and at the same time, they can help to solve the problems of lithium-sulfur batteries. In this work, gel polymer electrolyte (GPE) based on methyl methacrylate was prepared by cross-linking strategy. As cross-link ethylene glycol dimethacrylate (EDMA) was used. Prepared gel with a high electric conductivity was testing in the lithium-sulfur cell (Li/GPE/S). The electrochemical performance of the cell was studied.