A stable NH4PO3-glass proton conductor for intermediate temperature fuel cells

Hybrid Membrane based on Polymer-doped Phosposilicate and their Characterization

“…The crystallized supporting matrix, such as SiO2 and P2O5, were also responsible for the enhancement [32]. The presence of these phosphorous species was fundamental to the proton conduction process providing protons which could be exchanged by neighboring groups, hydroxyl groups, and adsorbed water to facilitate a Grotthuss proton transport [33]. For the conductivity, both triammonium phosphate and P2O5 were main contributors to the hybrid composite membranes and helped to increase the thermal stability and proton conductivity.…”

Multiscale Study of Electrochemical Energy Systems

“…The SiO 2 added to the electrolyte enhances the overall conductivity due to its hydrophilicity and the introduction of point defects. However, it was found that the high conductivity of CsH 2 PO 4 can only be maintained in the relatively narrow temperature range from 508 to 533 K, which requires high pressure or humidity [107]. Ammonium polyphosphate (NH 4 PO 3 ) is another possible candidate for a membrane material for intermediate DEFCs [107][108][109][110].…”

Model catalyst studies on hydrogen and ethanol oxidation for fuel cells

“…Added SiO 2 enhances conductivity due to its hydrophilicity and the introduction of point defects. However, it seems as if the high conductivity of CsH 2 PO 4 can only be maintained in the relatively narrow temperature range from 508 -533 K, requiring high pressure or humidity [65]. [67].…”