National Repository of Grey Literature 22 records found  beginprevious13 - 22  jump to record: Search took 0.01 seconds. 
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.
Přídavky manganu a niklu do elektrodových materiálů lithno-iontových baterií
Jirák, T. ; Vondrák, Jiří ; Sedlaříková, M. ; Hejátková, E.
The properties of electrode material based on LiCoO2 were modified by substitution of cobalt by Ni and/or Mn compounds. Specific energy of new material was lower, but their lifetime (number of cycles) was improved.
MnO2 studovaný metodou EQCM
Špičák, P. ; Svoboda, V. ; Sedlaříková, M. ; Vondrák, Jiří ; Kazelle, J.
Mass changes of electrodes containing MnO2 during charging and discharging processes were studied using QCMB techniques. The process is accompanied by reversible uptake of water and insertion of H3O+ insted of H+ should be expected.
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.
Vícestěnné uhlíkové nanotrubice jako záporná elektroda pro Li-iontové baterie
Zabloudil, M. ; Makovička, J. ; Sedlaříková, M. ; Vondrák, Jiří
Multiwall carbon nanotubes (Aldrich) were tested as anodes for Li-ion batteries with reached specific capacity 100 mAh/g.
Pokroky ve výzkumu aprotických gelových elektrolytů v České republice
Vondrák, Jiří ; Sedlaříková, M. ; Krejza, O. ; Velická, Jana
The progress of research of gel polymer electrolytes based on polymethacrylates and propylene carbonate is described. The electric conductivity and selected electrochemical processes in them is the main research field.
Ionexové membrány aniontového typu
Vondrák, Jiří ; Sedlaříková, M. ; Barath, P. ; Novák, V. ; Kliment, J.
An anionic ion exchanging membrane was synthetised by a reaction of polyepichlorhydrine and DABCO (diazobicyclooctane) with networking agents. It is not blocked by carbonate ions.
Iontoměničové membrány
Barath, P. ; Novák, V. ; Sedlaříková, M. ; Vondrák, Jiří ; Kazelle, J. ; Kliment, J.
The behaviour of a bipolar ionex membrane FUMATECh was studied in the potential range where the presence of an internal potential bariere inhibits any flow of current.
Počáteční potenciál redukce kyslíku v alkalických palivových článcích
Vondrák, Jiří ; Velická, Jana ; Barath, P. ; Sedlaříková, M. ; Kazelle, J. ; Kliment, J.
The onset potential of oxygen reductin was defined as the potential, below which the electroreduction of oxygen is possible. This value can be used for the comparison of various electrocatalysts. The method was tested on several carbonaceous materials onto which the same amount of platinum was deposited.
Application of NMR techniques for investigation of ionic mobilities in gel electrolytes
Nováček, T. ; Vondrák, Jiří ; Sedlaříková, M.
The mobility of Li and Na ions was observed both by specific conductivity and NMR line widening in Li and Na gels.

National Repository of Grey Literature : 22 records found   beginprevious13 - 22  jump to record:
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