National Repository of Grey Literature 22 records found  previous3 - 12next  jump to record: Search took 0.00 seconds. 
Nanokompositní elektrodové materiály se spinelovou strukturou pro lithno-iontové baterie
Jirák, T. ; Vondrák, Jiří ; Sedlaříková, M.
The article treats of electrode materials for lithium secondary batteries, concretely nanostructured Li4Ti5O12.
Studium elektrochemie uhlíku, část I: pohled pomocí SEM
Vognar, J. ; Dvořák, P. ; Černoch, P. ; Novák, V. ; Vondrák, Jiří ; Sedlaříková, M.
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.
Určení rozdílů relaxačních časů T2 u PMMA gelových elektrolytů
Vognar, J. ; Macalík, M. ; Špičák, P. ; Bartušek, Karel ; Novák, V. ; Vondrák, Jiří
T2 relaxation is complex phenomenon, but at its most fundamental level, it corresponds to a decoherence of the transverse nuclear spin magnetization.
Aprotické gelové polymerní elektrolyty
Vondrák, Jiří ; Sedlaříková, M. ; Krejza, O.
The systematic research of gel polymer electrolytes started in the days of 1st and 2nd Lithium Battery Meetings in Italy. The idea was rather unique - to "thicken" an aprotic solution of lithium sall with an inert polymer.
Studium gelových elektrolytů na bázi PMMA a obsahujících ionty Na+ pomocí nukleární magnetické rezonance
Vognar, J. ; Macalík, M. ; Špičák, P. ; Vondrák, Jiří ; Novák, V. ; Krejza, O. ; Bartušek, Karel
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.
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.
Stabilita alpha-Ni(OH)2 v závislosti na koncentraci elektrolytu
Vrbický, J. ; Vondrák, Jiří ; Sedlaříková, M.
Alpha nickel hydroxide is stable in normal conditions, but in alkaline electrolytes is unstable.
HOR NiOx jako elektrokatalyzátor palivových článků H2-O2
Barath, P. ; Sedlaříková, M. ; Vondrák, Jiří ; Chatenet, M. ; Roche, I.
Ni Ni/C and Raney Ni materials were studied as electrocatalysts for the HOR in alkaline medium.
Kinetické vlastnosti kladných elektrod se základem MnO2 s různými dopujícími přísadami
Vognar, J. ; Brudná, S. ; Novák, V. ; Vondrák, Jiří ; Sedlaříková, M.
The present study aims at evaluating the activity of such manganise oxide-based electrocatalysts toward the ORR. Electrochemical measurement was realized by method of cyclic voltametry on RDE in three electrodes circuit.

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