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NaBH4 was converted to H2 in reaction with H2O in presence of catalysts. Co(NO3)2 was the most efficient catalyst of the reaction.

Lota G.,Poznan University of Technology | Lota G.,Centralne Laboratorium Akumulatorow i Ogniw | Baraniak M.,Centralne Laboratorium Akumulatorow i Ogniw | Wasinski K.,Centralne Laboratorium Akumulatorow i Ogniw | Jankowska E.,Centralne Laboratorium Akumulatorow i Ogniw
Przemysl Chemiczny | Year: 2013

(CH2=CHCH2)2Me2N +Cl- was polymerized in aq. soln.,converted to hydrogen sulfate(VI) with H2SO4 and added (7.5%) to H 2SO4 used in Pb battery. The electrochem. and electrical properties of Pb\ionic liq.\PbO2 model system showed applicability of the polymeric ionic liq. as a new component of gel electrolyte.

Szwarc-Rzepka K.,Poznan University of Technology | Walkowiak M.,Centralne Laboratorium Akumulatorow i Ogniw | Osinska-Broniarz M.,Centralne Laboratorium Akumulatorow i Ogniw | Dutkiewicz M.,University Im ckiewicza znaniu | And 2 more authors.
Polimery/Polymers | Year: 2013

Hybrid SiO2/POSS fillers were obtained using the method based on solvent evaporation. Octakis({1,1,2,2,3,3,4,4-octafluoropentyloxypropyl} dimethylsiloxy) octasilsesquioxane (F-SF POSS) was used to modify the surface of silica, hydrated or prepared via emulsion method. The effectiveness of modification was evaluated by FT-IR spectroscopy and nuclear magnetic resonance (29Si and 13C CP MAS NMR). The parameters of porous structure of the prepared hybrid fillers, such as surface area BET, mean pore diameter and pore volume were determined. The hybrid products were subjected to dispersive analysis (non-invasive backscattering method, NIBS) and morphological characterization (using transmission electron microscopy - TEM). The obtained hybrid systems were used as additives in gel polymer electrolytes, prepared by activation of dry composite membranes in a liquid solution of lithium salt. The electrolytes were subjected to electrochemical studies, including the measurements of specific conductivity by impedance spectroscopy in a wide range of temperatures and the determination of potential windows by the linear cyclic vol-tammetry. The addition of POSS composites had a beneficial effect on the transport of lithium cations and the room temperature conductivity of gel electrolytes based on PVdF/HFP membranes was enhanced by an order of magnitude. The observed increasein gel conductivity was poorly correlated with the ability of liquid phase absorption. The anodic stability of gels only slightly increased upon the addition of POSS to PVdF/HFP membranes. The fillers studied show promising properties in the context of future research and development studies on new solid electrolytes for lithium cells with increased safety.

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