Protonic Conduction in the Single Crystal of Sc-Doped SrZrO₃

Abstract

The protonic conduction of Sc-doped SrZrO 3 (SrZr 1Àx Sc x O 3) in the single crystal form is investigated. The SrZr 1Àx Sc x O 3 crystals exhibit significantly higher conductivity than the pure ones, and the crystal with x ¼ 0:05 exhibits the highest conductivity of those masured. The activation energy of the SrZr 1Àx Sc x O 3 crystal decreases rapidly with increasing Sc 3þ concentration when x 0:05, and increases when x > 0:05. The activation energy of SrZr 0:95 Sc 0:05 O 3 agrees with the energy separation between hole states at the top of the valence band and the Fermi level.

Structural, optical and dielectric studies of lithium sulphate monohydrate single crystals

“…In LSMH crystal it is observed that the increase in conductivity with temperature from 105°C to 130°C is due to dissociation of water molecule into H + and OH − ions which in turn increase the concentration of charge carriers. Such type of conduction is described as protonic conduction [57]. Beyond 130°C, because of dehydration of water molecule, the conductivity decreases due to the decrease in the concentration of H + and OH − ions as is also observed in the thermal analysis of the crystal (Fig.…”

Deposition of Proton Conductive Oxide Thin films on a Porous Substrate for Fuel Cell Applications

“…For an MOCVD, we adopted liquid delivery (LD)-MOCVD technique which was used for (Pb,La)(Ti,Zr)O 3 (PLZT) thin film depositions [4]. MOCVD precursors used in this deposition were Sr(METHD) 2 , Zr(METHD) 4 , and Y(EDMMD) 3 (ADEKA Corp.), which were dissolved in ethylcyclohexane (ECH) at concentrations of 0.…”

“…MOCVD precursors used in this deposition were Sr(METHD) 2 , Zr(METHD) 4 , and Y(EDMMD) 3 (ADEKA Corp.), which were dissolved in ethylcyclohexane (ECH) at concentrations of 0. 1-(2-methoxyethoxy)-2,2,6,6-tetramethyl-3,5-heptanedio nate and 6-ethyl-2,2-dimethyl-3,5-decanedionate; respectively.)…”

“…This substrate still uses Pd, however, our proposal needs only several-m (or less) thick Pd, which is quite small amount of Pd compared to using Pd foils as the substrate [3]. In both cases, we adopted Y-doped SrZrO 3 (SZYO) as a proton conductive electrolyte because it possesses chemical stability with relatively high conductivities [4]. In this paper, we will review our recent results by way of two kinds of depositions for SOFCs.…”

Dielectric and conducting behavior of gadolinium–terbium fumarate heptahydrate crystals

“…The ac conductivity shown by mixed GTF heptahydrate complex is $ 10 À3 ohm À1 m À1 as has also been reported for other coordination compounds. 28,29 The activation energy Ea was calculated before the transition temperature by using the Arrhenius equation ac ¼ o exp (Ea/kT). Figure 9 shows a plot of ln ac versus 1000/T at 10 kHz just before the transition temperature.…”