National Repository of Grey Literature 352 records found  beginprevious234 - 243nextend  jump to record: Search took 0.01 seconds. 
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.
Přídavek peroxidu vodíku při přípravě tenkých vrstev SnO2
Macalík, M. ; Sedlaříková, M. ; Vondrák, Jiří
Tin dioxide, SnO2, is a semiconductor exhibiting good electric conductivity, optical transparency and reflectivity in infrared irradiation. Good transparency is connected to the 3 eV width of the band gap.
Přírodní grafit po oxidačním zpracování pro lithiové baterie
Makovička, J. ; Sedlaříková, M. ; Vondrák, Jiří
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.
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.
Fosfosilikátové membrány jako t. prostředek vodíkových palivových článků
Míka, M. ; Klápště, Břetislav ; Michal, J. ; Vondrák, Jiří
Increasing consumption of electric energy and its rising cost initiated an search for new technologies that can produce the energy more effectively and environment friendly.
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.
Katalyzátory kladných elektrod palivových článků
Novák, V. ; Brudná, S. ; Vognar, J. ; Barath, P. ; Vondrák, Jiří ; Sedlaříková, M. ; Kazelle, J.
The fuel cells belongs to group of derivaces in which is internal energy of the fuel changed into the electrical energy.The electrochemical reaction is representanted by marked peak in half wave potential area.By that method can be found out activity of the electrode which determine potential of inflection point or potential of half-wave.
Vliv substrátu SnO2 na elektrochromní vlastnosti WO3
Macalík, M. ; Vondrák, Jiří ; Sedlaříková, M. ; Mohleníková, J.
The use of SnO2 electrically conductive layers prepared either by vacuum deposition or by spray pyrolysis was tested as support for electrochromic layers WO3. Vacuum deposited electrode exhibited better transparency, while the performance of chemically deposited electrodes was quite sufficient.

National Repository of Grey Literature : 352 records found   beginprevious234 - 243nextend  jump to record:
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15 VONDRÁK, Jan
15 Vondrák, Jan
4 Vondrák, Jaroslav
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