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Preparation and Characterisation of Pelletised Glass Electrolytes for Fuel Cells

“…This was suggested to be the result of the resistance of the grain boundary being decreased due to an adhesion around the glass particles as well as the proton conducting H 3 PO 4 being an effective binder. The conductivity of sample 2 was found to be lower than that of the proton-conducting glass electrolyte P 2 O 5 -SiO 2 [6][7][8], and the reason for this was that the pore size of the PGMs, i.e., 2 nm, was smaller than for glass electrolytes prepared by the sol-gel method. Regarding the electrical conductivity of porous glasses containing both hydroxyl bonds and water, it could be concluded that the electrical charge carrier consisted in proton dissociation from the hydroxyl groups on the pore surfaces and an increased conductivity with increase in contents of both hydroxyl and water.…”

“…These glasses are porous and exhibit high conductivities of more than 10 -2 S cm -1 at room temperature as a result of water being adsorbed in their pores [7,8]. Phosphosilicate (P 2 O 5 -SiO 2 ) glasses are well known for their fast-proton conductivity attributed to strong hydrogen bonds between water molecules and POH groups of the glass surface.…”

Investigations on sol–gel process and structural characterization of SiO2-P2O5 powders

“…The hydrogen concentration cell was constructed using the sol-gel-derived 5P 2 O 5 95SiO 2 glass, and the electromotive force was measured as a function of the partial pressure of hydrogen gas and the relative humidity. These glasses are chemically stable and have potential for practical hydrogen sensors [8]. Sol-gel multilayer waveguides were prepared from materials belonging to Nd-doped SiO 2 -TiO 2 -P 2 O 5 system.…”