No (264)
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264
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Heterogeneity of PMMA-pc based gel electrolytes
Krejza, O.; Špičák, P.; Sedlaříková, M.; Vognar, J.; Vondrák, Jiří
2008 - English
Heterogeneity of PMMA-pc based gel electrolytes. Různorodost PMMA-pc základních gel-elektrolitů.
Keywords:
gel electrolytes
Available at various institutes of the ASCR
Heterogeneity of PMMA-pc based gel electrolytes
Heterogeneity of PMMA-pc based gel electrolytes.
Různorodost PMMA-pc základních gel-elektrolitů.
Determination of difference of T2 relaxation time measurement with PMMA based gel electrolytes
Vognar, J.; Macalík, M.; Špičák, P.; Bartušek, Karel; Novák, V.; Vondrák, Jiří
2008 - English
T2 relaxation is complex phenomenon, but at its most fundamental level, it corresponds to a decoherence of the transverse nuclear spin magnetization. Určení rozdílů relaxačních časů T2 u PMMA gelových elektrolytů.
Keywords:
gel electrolytes; PMMA
Available at various institutes of the ASCR
Determination of difference of T2 relaxation time measurement with PMMA based gel electrolytes
T2 relaxation is complex phenomenon, but at its most fundamental level, it corresponds to a decoherence of the transverse nuclear spin magnetization....
Nanocomposite electrode materials with spinel structure for lithium-ion batteries
Jirák, T.; Vondrák, Jiří; Sedlaříková, M.
2008 - English
The article treats of electrode materials for lithium secondary batteries, concretely nanostructured Li4Ti5O12. Nanokompositní elektrodové materiály se spinelovou strukturou pro lithno-iontové baterie.
Keywords:
accumulators; nanocomposite electrode materials
Available at various institutes of the ASCR
Nanocomposite electrode materials with spinel structure for lithium-ion batteries
The article treats of electrode materials for lithium secondary batteries, concretely nanostructured Li4Ti5O12....
Mesoporous nickel-nickel oxide for the fuel cell catalyst
Barath, Peter; Uhlířová, Tereza; Reiter, Jakub
2008 - English
Nanostructured (mesoporous) nickel-nickel oxide was prepared from the medium of the lyotropic liquid crystals. The electrochemical properties of the material deposited in thin layers were studied, especially the hydrogen oxidation reaction. The catalyst exhibits remarkable catalytic activity. Z prostředí lyotropních kapalných krystalů byl připraven nanostrukturní (mezoporézní) materiál nikl-oxid nikelnatý v podobě tenkých vrstev a byly studovány jeho elektrochemické vlastnosti, především oxidace vodíku. Materiál vykazuje značnou katalytickou aktivitu.
Keywords:
fuel cell catalyst
Available at various institutes of the ASCR
Mesoporous nickel-nickel oxide for the fuel cell catalyst
Nanostructured (mesoporous) nickel-nickel oxide was prepared from the medium of the lyotropic liquid crystals. The electrochemical properties of the material deposited in thin layers were studied, ...
Polymer electrolytes for lithium-ion batteries operating at elevated temperatures
Reiter, Jakub; Dominko, R.; Jakubec, Ivo; Michálek, J.
2008 - English
Methacrylate-based polymer electrolytes with lithium perchlorate or lithium bis(oxalato)borate were prepared and studied as perspective materials for lithium-ion batteries operating at elevated temperatures (70 – 80 °C) and exibiting higher electrochemical and chemical stability towards oxidation. The accesible potential window on gold electrode was found to be 4.9 – 5.1 V vs. Li/Li+. The ionic conductivity at 70 °C is 1.9 – 2.4 mS/cm. Byly studovány polymerní elektrolyty s chloristanem lithným nebo bis(oxalato)boritanem lithným pro lithno-iontové baterie pracující za vyšších teplot (70 – 80 °C), které vykazují vyšší elektrochemickou a chemickou stabilitu vůči oxidaci. U těchto elektrolytů bylo zjištěno dostupné potenciálové okno na zlatě až do 4,9 – 5,1 V vs. Li/Li+. Iontová vodivost při 70 °C je 1,9 – 2,4 mS/cm.
Keywords:
polymer electrolytes
Available at various institutes of the ASCR
Polymer electrolytes for lithium-ion batteries operating at elevated temperatures
Methacrylate-based polymer electrolytes with lithium perchlorate or lithium bis(oxalato)borate were prepared and studied as perspective materials for lithium-ion batteries operating at elevated ...
Natural graphite after oxidative treatment for Li-ion batteries
Makovička, J.; Sedlaříková, M.; Vondrák, Jiří
2008 - English
In the last decades,many kinds of carbon materials have been investigated as anode materials for Li-ion batteries. Among them, natural graphite appears as a promising candidate due to its advantages such as high capacity at low electrode potential relative to lithium metal. Přírodní grafit po oxidačním zpracování pro lithiové baterie.
Keywords:
Li-ion batteries
Available at various institutes of the ASCR
Natural graphite after oxidative treatment for Li-ion batteries
In the last decades,many kinds of carbon materials have been investigated as anode materials for Li-ion batteries. Among them, natural graphite appears as a promising candidate due to its advantages ...
A study of PMMA based gel electrolytes containing Na+ ions by nuclear magnetic resonance
Vognar, J.; Macalík, M.; Špičák, P.; Vondrák, Jiří; Novák, V.; Krejza, O.; Bartušek, Karel
2008 - English
Mixture of liquid MMA and PC displays significantly longer relaxation times T1 and T2 than clear solution of NaClO4 in PC. Possibly reason is that the presence of MMA release solvatation of ions Na+ by propylencarbonate. Studium gelových elektrolytů na bázi PMMA a obsahujících ionty Na+ pomocí nukleární magnetické rezonance.
Keywords:
gel electrolytes
Available at various institutes of the ASCR
A study of PMMA based gel electrolytes containing Na+ ions by nuclear magnetic resonance
Mixture of liquid MMA and PC displays significantly longer relaxation times T1 and T2 than clear solution of NaClO4 in PC. Possibly reason is that the presence of MMA release solvatation of ions Na+ ...
Electrochemical carbon study part I:enviromental SEM view
Vognar, J.; Dvořák, P.; Černoch, P.; Novák, V.; Vondrák, Jiří; Sedlaříková, M.
2008 - English
Graphite and amporfous carbon ( carbon black) structure is widely used as electrode material for batteries, fuel cells and supercapacitors. In this paper SEM study assortment of carbon samples was accomplished. Studium elektrochemie uhlíku, část I: pohled pomocí SEM.
Keywords:
fuel cells
Available at various institutes of the ASCR
Electrochemical carbon study part I:enviromental SEM view
Graphite and amporfous carbon ( carbon black) structure is widely used as electrode material for batteries, fuel cells and supercapacitors. In this paper SEM study assortment of carbon samples was ...
Proton conductive polymer gel electrolytes based on methacrylates
Reiter, Jakub; Velická, Jana; Míka, M.
2007 - English
New, proton conductive electrolytes based on methacrylates and phosphoric acid were prepared. These aprotic electrolytes exhibit conductivity up to 0.1 mS/cm and they were also characterised using voltammetrical and thermogravimetrical methods. Byly připraveny protonově vodivé elektrolyty na bázi methakrylátů a kyseliny fosforečné. Tito nové aprotické elektrolyty vykazují vodivost až 0.1 mS/cm a byly též charakterizovány pomocí voltametrických a termogravimetrických metod.
Keywords:
polymer gel electrolytes; solid and polymeric conductors
Available at various institutes of the ASCR
Proton conductive polymer gel electrolytes based on methacrylates
New, proton conductive electrolytes based on methacrylates and phosphoric acid were prepared. These aprotic electrolytes exhibit conductivity up to 0.1 mS/cm and they were also characterised using ...
Analysis of energetic performance of glass melting processes as a basiss for advanced glass production
Němec, Lubomír; Jebavá, Marcela
2007 - English
The glass producers face frequently problems of glass quality, energy consumption, investements into technology and environmental damages. Výrobci skla mají často problém s kvalitou skla, spotřebou energie a investicemi do technologie.
Keywords:
glass melting
Available at various institutes of the ASCR
Analysis of energetic performance of glass melting processes as a basiss for advanced glass production
The glass producers face frequently problems of glass quality, energy consumption, investements into technology and environmental damages....
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