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Elektrolyty s rozpouštědly typu sulfolanu
Máca, Josef ; Zatloukal, Miroslav (oponent) ; Sedlaříková, Marie (vedoucí práce)
Předkládaná práce se zabývá studiem aprotických elektrolytů pro zvýšení bezpečnosti pro použití v lithno-iontových akumulátorech. Zvýšení bezpečnosti je stanoveno pomocí bodu vzplanutí jednotlivých elektrolytů, současně jsou vyhodnocovány další parametry důležité pro použití v akumulátorech. Rozsah použitelnosti teplot daných elektrolytů, je omezen bodem tuhnutí. Bod tuhnutí je měřen pomocí kryoskopie. Z elektrických vlastnosti je měřena měrná vodivosti elektrolytu.
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The Freezing Point Determination Of Electrolytes With Fire Retardant By Cryoscopy Method
Štulák, Stanislav ; Vondrák, Jiří (oponent) ; Máca, Josef (vedoucí práce)
The thesis is devoted to the field of properties investigation of new types of electrolytes, and assess the appropriateness of electrolytes studied in this paper for use in Li -ion batteries. It focuses specifically on electrolytes based on aprotic solvents and their mixtures with the flame retardants. The goal of the thesis is to investigate the effects of FRAs on electrolyte mixtures via changes in specific conductivity and freezing point. These objectives were fulfilled by using electrochemical impedance spectroscopy in combination with a cryoscopic measurement method. There were overall 16 samples examined. The samples were prepared as a combination of chemicals, specifically Ethylene carbonate (EC), propylene carbonate (PC), dimethyl carbonate (DMC), dimethyl sulfone (DMSO2), triethyl phosphate (TEP) Dimethyl methylphosphonate (DMMP), triphenyl phosphate (TPP). Based on the results of the experiments, the mixtures were sorted according to the observed properties in the tables listed in the last part of this paper. These values can be further used to supplement the continuing research of electrolytes and also as assistance in searching for the new electrolyte mixtures.
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The Freezing Point Determination Of Electrolytes With Fire Retardant By Cryoscopy Method
Štulák, Stanislav ; Vondrák, Jiří (oponent) ; Máca, Josef (vedoucí práce)
The thesis is devoted to the field of properties investigation of new types of electrolytes, and assess the appropriateness of electrolytes studied in this paper for use in Li -ion batteries. It focuses specifically on electrolytes based on aprotic solvents and their mixtures with the flame retardants. The goal of the thesis is to investigate the effects of FRAs on electrolyte mixtures via changes in specific conductivity and freezing point. These objectives were fulfilled by using electrochemical impedance spectroscopy in combination with a cryoscopic measurement method. There were overall 16 samples examined. The samples were prepared as a combination of chemicals, specifically Ethylene carbonate (EC), propylene carbonate (PC), dimethyl carbonate (DMC), dimethyl sulfone (DMSO2), triethyl phosphate (TEP) Dimethyl methylphosphonate (DMMP), triphenyl phosphate (TPP). Based on the results of the experiments, the mixtures were sorted according to the observed properties in the tables listed in the last part of this paper. These values can be further used to supplement the continuing research of electrolytes and also as assistance in searching for the new electrolyte mixtures.
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Elektrolyty s rozpouštědly typu sulfolanu
Máca, Josef ; Zatloukal, Miroslav (oponent) ; Sedlaříková, Marie (vedoucí práce)
Předkládaná práce se zabývá studiem aprotických elektrolytů pro zvýšení bezpečnosti pro použití v lithno-iontových akumulátorech. Zvýšení bezpečnosti je stanoveno pomocí bodu vzplanutí jednotlivých elektrolytů, současně jsou vyhodnocovány další parametry důležité pro použití v akumulátorech. Rozsah použitelnosti teplot daných elektrolytů, je omezen bodem tuhnutí. Bod tuhnutí je měřen pomocí kryoskopie. Z elektrických vlastnosti je měřena měrná vodivosti elektrolytu.
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