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Liquid electrolytes with lower flammability
Hanzelka, Miroslav ; Vondrák, Jiří (referee) ; Sedlaříková, Marie (advisor)
The Bachelor’s thesis on subject Liquid electrolytes with lower flammability discusses about selection appropriate composition of electrolyte with consideration of higher safety for use in lithium-ion rechargeable batteries. The main objective of this work is to find that appropriate composition and find mutual relations between measurements.
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Electrode Active Materials for Lithium-Ion Accumulators
Čech, Ondřej ; Oriňáková, Renáta (referee) ; Paidar,, Martin (referee) ; Sedlaříková, Marie (advisor)
This doctoral thesis deals with synthesis and characterisation of electroactive electrode materials for li-ion batteries and accumulators. The work is divided into two main parts. One deals with LiFePO4 based cathode composite electroactive material and in the second is described the synthesis and utilization of monoclinic TiO2(B) as an anode for li-ion cell. The main aim of the work is to relate the synthesis procedure and structural properties of both materials to its electrochemical preformance.
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New polymer gel electrolytes
Cafourek, Martin ; Vondrák, Jiří (referee) ; Sedlaříková, Marie (advisor)
This work deals with preparation of gel polymer electrolytes with content of alcaline saults and with conductivity measurements. Materials used for polymer electrolyte preparation and methods of preparation are analysed with respect to usable properties. Experimental part is focused on preparation of methacrylate gel electrolytes, on basis of methacrylate and 3-(Trimehtoxysilyl)propyl methacrylate. Electric conductivity measured by means of impedance spectroscopy is evaluated and compared and possibilites for further research are proposed.
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Electrodes materials for electrochromic devices based on V2O5
Janov, Pavel ; Macalík, Michal (referee) ; Sedlaříková, Marie (advisor)
The bachelor thesis deals with researching electrodes materials for electrochromic device based on V2O5. The wokr is dividet into two areas – teoretical and practical part. Teoretical part is aimed at elektrochromism, deposition thin layers manely V2O5. Consenquetial part is concentrated on glass substrate covered conducted film and was set their elektrochromic point. Then was found influence subsidy these layers with sodium and observed with sample without subsidy.
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Electrodes materials for electrochromic devices based on V2O5
Janov, Pavel ; Macalík, Michal (referee) ; Sedlaříková, Marie (advisor)
The bachelor thesis deals with researching electrodes materials for electrochromic device based on V2O5. The wokr is dividet into two areas – teoretical and practical part. Teoretical part is aimed at elektrochromism, deposition thin layers manely V2O5. Consenquetial part is concentrated on glass substrate covered conducted film and was set their elektrochromic point. Then was found influence subsidy these layers with sodium and observed with sample without subsidy.
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Materials for Supercapacitors
Dvořák, Petr ; Paidar,, Martin (referee) ; Trnková, Libuše (referee) ; Sedlaříková, Marie (advisor)
This dissertation deals with the electrode materials, liquid and gel electrolytes suitable for supercapacitors. In the field of electrode materials were investigated carbon materials based on carbon blacks, expanded and micronized graphite suitable for supercapacitors working on the principle electrochemical double layer. Another area which this thesis deals with are aprotic liquid electrolytes prepared from suitable types of salts and aprotic solvents. The last part is focused on the preparation and subsequent electrochemical characterization of gel polymer electrolytes in order to increase the ionic conductivity of these electrolytes.
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Thin Film Electrodes for Electrochromic Devices
Macalík, Michal ; Kadlec, Jaromír (referee) ; Nováková,, Sabina (referee) ; Sedlaříková, Marie (advisor)
The work deals with the deposition of layers for electrochromic device with different methods. Transparent electrically conductive layer of SnO2 was deposited by pyrolytic decomposition of peroxostannate solution. Hydrogen peroxide in starting solution contributes to the oxidation process of growth layers and to increase the electrical conductivity. Active electrochromic layer of WO3 was electrolytic deposited from the peroxotungstic acid solution. Optimal deposition time and the optimal annealing temperature of deposited layers were found. Passive electrochromic layer of V2O5 was deposited using dip-coating method from peroxovanadate solution. A contribution of solution diluted with distilled water was investigated. Found results were used to construct complete electrochromic device with polymer gel electrolyte.
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