Characterization of the Dynamics in the Protonic Conductor CsH2PO4 by O Solid-State NMR Spectroscopy and First-Principles Calculations: Correlating Phosphate and Protonic Motion Gunwoo Kim,1 John M. Griffin,1 Frédéric Blanc,1,# Sossina M. Haile,2 and Clare P. Grey1,3* 1 Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, United Kingdom, 2 Materials Science, Cal...

We report the discovery of a new superprotonic compound, Cs7(H4PO4)(H2PO4)8, or CPP, which forms at elevated temperatures from reaction CsH2PO4 and CsH5(PO4)2. The structure, solved using high temperature single crystal x-ray diffraction confirmed by 31P NMR spectroscopy, crystallizes in space group Pmn has lattice constant 20.1994(9) Å 130 °C. unit cell resembles 4  superstructure CsH2PO4, bu...

To investigate the caloric effects in CsH2PO4 ferroelectric, a modified pseudospin model of this crystal is used, which takes into account dependence parameters interaction between pseudospins on lattice strains. The also effective dipole moment order parameter. In two-particle cluster approximation, influence longitudinal electric field and hydrostatic pressure molar entropy was studied. elect...

Carbon nanotubes have been explored as interconnects in solid acid fuel cells to improve the link between nanoscale Pt catalyst particles and macroscale current collectors. The nanotubes were grown by chemical vapor deposition on carbon paper substrates, using nickel nanoparticles as the catalyst, and were characterized using scanning electron microscopy and Raman spectroscopy. The composite el...

Solid solution investigations in the CsHSO4–CsH2PO4 system, carried out as part of an ongoing effort to elucidate the relationship between proton conduction, hydrogen bonding, and phase transitions, yielded the new compound Cs5(HSO4)3 (H2PO4)2. Single-crystal X-ray diffraction methods revealed that Cs5(HSO4)3(H2PO4)2 crystallizes in space group C2/c (or possibly Cc), has lattice parameters a 5 ...

Based on the pseudospin model of deformed CsH2PO4 crystal within Glauber method, equation for time-dependent mean value is obtained, which solved in case small deviations from equilibrium state. Using solution equation, we find expressions longitudinal dynamic dielectric constant and relaxation time. proposed parameters theory, temperature frequency dependences dependence time are calculated in...

The mechanical properties of the CsH2PO4 and hybrid compounds with different polymers (SKF-26, UPTFE, Butvar B-98) was determined by Vickers microhardness test for first time. It shown that increase in volume fraction polymer results low HV values corresponding to high robustness membranes plastic deformation. Mechanical depend on type best were obtained SKF-26. improvement makes investigated c...