نتایج جستجو برای: proton conductivity
تعداد نتایج: 115521 فیلتر نتایج به سال:
The controlled bottom-up design of polymers with metal oxide backbones is a grand challenge in materials design, as it could give unique control over the resulting chemical properties. Herein, we report 1D-organo-functionalized polyoxometalate polymer featuring purely inorganic backbone. self-assembled from two types monomers, Wells–Dawson-type polyoxometalates, and aromatic organo-boronates. T...
We performed first principles molecular dynamics simulations to elucidate the mechanism and role of 1,2,3-triazole in proton transport while it is mixed with phosphoric acid (PA) and a phosphoric acid imidazole mixture. PA doped imidazole based polymer acts as an efficient polyelectrolyte membrane for fuel cells. The conductivity of this membrane increases when triazole is added to the system. ...
A-cation deficiency has a significant impact on the properties of proton-conducting perovskites (ABO 3 ), depending factors such as ionic radius, concentration dopant and degree substoichiometry A-site cation. Here, we focus influence Ba structure, stability partial electrical conductivities perovskite BaCe 0.8 Y 0.2 O 3-δ (BCY20). Neutron powder diffraction is employed to determine monoclinic ...
The compound CsH2PO4 has emerged as a viable electrolyte for intermediate temperature (200-300 degrees C) fuel cells. In order to settle the question of the high temperature behavior of this material, conductivity measurements were performed by two-point AC impedance spectroscopy under humidified conditions (p[H2O] = 0.4 atm). A transition to a stable, high conductivity phase was observed at 23...
Proton transfer in polymer electrolyte membrane is an essential mechanism fuel cell (PEMFC). The development of PEM mostly relies on modification with proton conductive species followed by casting. This brings the random existence to result a limit conductivity. present work proposes alignment species, i.e., donor and acceptor chains, through surface-initiated polymerization so that proceeds ef...
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