The aim of this work is to describe the influence of temperature on the structure and chemical composition of electrode materials for Li-ion accumulators. Theoretical part of this thesis contains described terminology and general issues of batteries and their division. Every kind of battery is provided with a closer description of a specific battery type. A separate chapter is dedicated to lithium cells, mainly Li-ion batteries. Considering various composition of Li-ion batteries, the next subchapters deeply analyzes the most used cathode (with an emphasis on the LiFePO4, LiMn1/3Ni1/3Co1/3O2) and anode materials (with an emphasis on the Li4Ti5O12). The next chapters describe the used analytical methods: electron microscopy, energy dispersion spectroscopy and thermomechanical analysis. The practical part is devoted to the description of the individual experiments and the achieved results.

This master thesis is dedicated to system of water monitoring for use of alternative source power supply and GSM communication. The thesis carried out research on the possibilities to take measurements on watercourses, also detailed research of photovoltaic panel, available accumulators and their charging and a synopsis of similar systems. Furthermore, the master thesis also captures design and implementation datalogger device type with possibility to send measured data to the website.

Charging station; PV panel; accumulator; battery; lithium; LiFePO4; Arduino