National Repository of Grey Literature 14 records found  1 - 10next  jump to record: Search took 0.00 seconds. 
Amperometric Solid-State NO2 Sensor with Ionic Liquid-Polymer Electrolyte
Nádherná, M. ; Opekar, F. ; Reiter, Jakub
A new ionic liquid-polymer electrolyte was successfully tested in the planar amperometric solid-state sensor sensitive towards nitrogen dioxide. The electrolyte consists of 1-butyl-3-methylimidazolium hexafluorophosphate (BMIPF6) and poly(ethylene glycol) methyl ether methacrylate (PEGMEMA) in the ratio 57:43 mol. %. The analyte, gaseous nitrogen dioxide in air, was determined using the electrochemical reduction at900 mV vs. Pt/air on gold minigrid indicating electrode with Pt/air as a reference electrode. Dependency of sensor sensitivity on the indicating electrode area and relative humidity was determined. The sensor response is linear in the NO2 concentration range 0.3 1.1 ppm and is reproducible and long-term stable.
Formation Of Sn-Ag-C and Sn-Au-C Nanoalloys Through Ir Laser Ablation OF Ag and Au Target and Simultaneous Decomposition of TMT in the Gas Phase
Křenek, Tomáš ; Murafa, Nataliya ; Bezdička, Petr ; Šubrt, Jan ; Pola, Josef
IR laser ablation of Ag or Au in dielectric breakdown of tetramethyltin leads to nanostructured films composed of nanograins of Sn and amorphous Au-C or Ag-C phases.
IR Laser-Induced Carbothermal Reduction of Titanium Monoxide: Carbon-Phase Shield to Nanosized TiO Oxidation
Jandová, Věra ; Bastl, Zdeněk ; Šubrt, Jan ; Pola, Josef
Pulsed IR laser-irradiation of titanium monoxide (TiO) leads to ablation and when carried out in gaseous benzene (1-5 Torr) to simultaneous dielectric breakdown of benzene into low molecular carbonaceous species. Both processes allow carbothermal reduction of ablated TiO particles with agglomerating carbonaceous species and deposition of carbon-coated TiO nanoparticles remarkably stable towards oxidation in air. The reported results suggest potential for protection of reactive gas-phase produced nanoparticles by carbon phase.
Ion liquids for safer lithium-ion batteries - aluminium corrosion in TFSI- based ILs
Nádherná, Martina ; Dominko, R. ; Gabersček, M. ; Reiter, Jakub
The electrolytes based on ionic liquids were more compatible with electrode additives ( a combination of Al, CB and EPDM binder ) than the conventional electrolytes.
Elektrolyty pro lithno-iontové baterie pracující při vyšších teplotách
Reiter, Jakub ; Dominko, R. ; Jakubec, Ivo ; Michálek, J.
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.
Mezoporézní nikl-oxid nikelnatý pro katalyzátory palivových článků
Barath, Peter ; Uhlířová, Tereza ; Reiter, Jakub
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.
Li+ a H+ vodivé polymerní elektrolyty s kovalentně vázanými anionty
Reiter, Jakub ; Michálek, Jiří ; Přádný, Martin ; Chmelíková, Dana ; Širc, Jakub
New single-ion conducting electrolytes based on methacrylates were prepared using direct, radically initiated polymerisation: copolymers of methacrylic acid (MA) or lithium methacrylate (LiMA) with 2-ethoxyethyl methacrylate (EOEMA) and poly(ethylene glycol) methyl ether methacrylate (EGMEMA) as pure cationically conducting Li+ or H+ electrolytes and covalently bonded carboxylic group. For the conductivity improvement, a set of electrolytes with embedded aprotic solvent (propylene carbonate PC or N,N-dimethylformamide DMF) was prepared.
Elektrochemické redoxní procesy polymerních elektrolytech na bázi methakrylátů – studie na mikroelektrodě
Nádherná, Martina ; Reiter, Jakub
In our recent project we have investigated electrochemical behaviour of ferrocene in liquid and polymer aprotic electrolytes using various electrochemical methods. The apparent diffusion coefficients were determined for propylene carbonate and poly(ethyl methacrylate)-propylene carbonate medium. Thank to optimised electrolyte composition, the polymerisation lowers the mobility of ferrocene only by 15 – 50 times contrary to previously studied PMMA-PC (Superacryl-based) electrolytes, where approx. three order decrease of diffusion coefficients was found.
Polymerní elektrolyty na bázi methakrylátů pro elektrochromní zařízení a lithno-iontové baterie
Krejza, O. ; Reiter, Jakub ; Vondrák, Jiří
Poly(ethyl methacrylate) and poly(2-ethoxyethylmethacrylate) polymer electrolytes with embedded aprotic solvents (carbonates) and lithium perchlorate and lithium bis(oxalato)borate were tested in electrochromic devices and lithium-ion batteries.
Protonově vodivé polymerní elektrolyty na bázi methakrylátů
Reiter, Jakub ; Velická, Jana ; Míka, M.
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.

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