Stanovení bodu tuhnutí elektrolytů s retardérem hoření kryoskopickou metodou
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B
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Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií
Abstract
Zhotovená práca sa venuje oblasti skúmania vlastností nových typov elektrolytov, a zhodnoteniu vhodnosti elektrolytov skúmaných v tejto práci pre použitie v Li-ion batériách. Konkrétne sa zameriava na elektrolyty s aprotickými rozpúšťadlami a ich zmesami v kombináciii s retardérmi horenia. Práca si kladie za úlohu experimentálne vyšetriť vodivosť a bod tuhnutia takto pripravených zmesí elektrolytov, ako aj sledovať účinky prímesí retardérov na tieto vlastnosti. Na riešenie tejto úlohy bolo zvolené použitie elektrochemickej impedančnej spektroskopie v kombinácii s kryoskopickou metódou. Celkovo bola skúmaná vhodnosť a vlastnosti 16 vzoriek elektrolytov pripravených kombináciou chemikálií etylén-karbonát (EC), propylén-karbonát (PC), dimetyl-karbonát (DMC), dimetyl-sulfon (DMSO2), trietyl-fosfát (TEP) dimetyl-metylfosfonát (DMMP), trifenyl-fosfát (TPP). Uskutočnenými pokusmi sa roztriedili zmesi podľa sledovaných vlastností do tabuliek uvedených vo výsledkoch práce. Tieto hodnoty môžeme ďalej využiť pre doplnenie informácií pokračujúceho výskumu elektrolytov prípadne ako pomoc pri typovaní nových zmesí elektrolytov.
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.
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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Keywords
rozpúšťadlo, aprotické elektrolyty, retardéry horenia, impedančná spektroskopia, merná vodivosť, kryoskopia, Li-ion elektrolyty, Trietyl-fosfát, Dimetyl-metylfosfonát, Trifenyl-fosfát, solvent, aprotic electrolytes, flame retardants, impedance spectroscopy, specific conductivity, Cryoscopy, Li-ion electrolytes, Triethyl phosphate, Dimethyl methylphosphonate, Triphenyl phosphate
Citation
ŠTULÁK, S. Stanovení bodu tuhnutí elektrolytů s retardérem hoření kryoskopickou metodou [online]. Brno: Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií. 2014.
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Document version
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Language of document
sk
Study field
Elektrotechnická výroba a management
Comittee
doc. Ing. Josef Jirák, CSc. (předseda)
prof. Ing. Vojtěch Koráb, Dr., MBA (místopředseda)
Ing. Zdenka Rozsívalová (člen)
Ing. Petr Dvořák, Ph.D. (člen)
prof. Ing. Jiří Vondrák, DrSc. (člen)
Date of acceptance
2014-06-11
Defence
1) Byly vzorky chlazene homogene po celem objemu?
2) Jakym zpusobem jste řadil a zpracovaval literaturu použitou v diplomove praci?
Result of defence
práce byla úspěšně obhájena
Document licence
Standardní licenční smlouva - přístup k plnému textu bez omezení