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New Electrolytes for Modern Electrochemical Applications
Reiter, Jakub ; Mička, Zdeněk (advisor) ; Opekar, František (referee) ; Vlček, Antonín (referee)
1. Introduction Electrochemical and mechanical properties of polymer gel electrolýes have been intensively investigated since the introduction ofthe 1" generation of solid polyrrner electrolýes by M.Armand [1]. Their electrochemical application includes secondary lithium batteries, supercapacitors, chemical sensors and electrochromic devices. Wide application of the gel polyrner electrolytes is allowed due to the hrgher ionic conductivity compared with solid polyrner electrolýes and due to the higher safety properties in comparison with common liquid electrolytes. Organic methacrylate-based polymers are perspective materials for their low toxicity both of monomer and polymer forrn, when methyl methacrylate (MMA) is widely used in the dental praxis. Poly(methyl methacrylate) PMMA was used in electrochemistry for the frst time by Iijíma [2] and than either pure or in different polymer modifications including varlous copolymers [3, 4]. Aprotic solvents like sulpholane, organic carbonates, N,N- dimethylformamide, and formamide are usually incorporated in the polymer structure to form ternary electrolýe polymer-solvent-salt. PMMA polymer gel electrolytes with embedded particles of nanosized TiO2 [5], carbon [6] or proton-conductive membranes with different organic acids t7l oÍ orthophosphoric acid [8] were...
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Modelování spektrálních a fotochemických vlastností diiminových karbonylových komplexů přechodových kovů s diiminy
Šebera, Jakub ; Záliš, Stanislav ; Vlček, Antonín
The felxibility pf the coordination sphere of mixed valence carbonyl complexes enables to tune spectral and protochemical properties. The variety of excited states in ilustrated on Ru, Re and W mixed ligand carbonyl complexed. The lowest excited states of [W(CO)4L] and [W(CO)5L’] (L=N,N'-di-methyl-1,4-diazabutadiene, ethylenediamine, 2,2’-bipyridine, phenantroline; L’= pyridine, 4-CN-pyridine, piperidine) ckomplexes were found to be either W -> pi*(L) or W -> pi*(CO) in charakter, depending on the type of the heteroligands.
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