Development of Proton Conducting Thin Films from Nanoparticulate Precursors

Abstract

Three different routes allowing preparation of nanoparticulate yttrium-doped barium cerate have been developed: flash combustion, hydrolysis of complexed metal acrylates, and the use of inverse micelles. These methods allow preparation of doped perovskites of particle size in the range 5 - 50 nm. Water uptake characteristics have been determined after high temperature sintering, and proton conduction properties characterized between 400 and 600 {degree sign}C. The availability of sufficiently small particles opens up the possibility of using deposition techniques from colloidal suspensions of powders: In this work, nonporous BaCe0.9Y0.1O2.95 thin films have been synthesised on porous NiO/BCY10 substrates by spin coating. Scanning electron microscopy show that these films are dense, homogenous and with a thickness of 40 µm.

What Happens during Thermal Post‐Treatment of Powder Aerosol Deposited Functional Ceramic Films? Explanations Based on an Experiment‐Enhanced Literature Survey

“…These ceramic compounds feature a high chemical and thermal stability in conjunction with high protonic conductivities up to 10 −2 S cm −1 at 600 °C. [ 121 ] While such properties make them promising candidates for potential use in SOFCs, a major drawback of the material classes previously existed in form of very high sintering temperatures up to 1800 °C, especially for yttria‐doped barium zirconate. [ 122 ] However, dense and gas‐tight membranes with thicknesses between 5 and 10 µm could be easily produced by powder aerosol deposition.…”

Development of Multilayer Anodes for Proton-conducting Solid Oxide Fuel Cells

“…BaCe 0.9 Y 0.1 O 3-δ (BCY10) electrolyte powder was synthesised by the flash combustion method as previously reported (5,6). An aqueous solution containing the appropriate molar ratios of metal nitrates and glycine was concentrated and placed into an oven at 600°C to start the combustion reaction.…”

Hydrogen Permeation Properties of Ternary Ni–BaCe0.9Y0.1O3–Ce0.9Gd0.1O2 Cermet Membranes

“…Among the perovskite proton-conducting oxides, BaCeO 3 -based oxides such as BaCe 0.9 Y 0.1 O 3 (BCY) exhibit relatively high proton conductivity [19,20]. The conductivity of BCY is approximately ten to the power of −1.7 S cm −1 , even at 600 • C [21]. Guan et al reported the mixed ionicelectronic conducting character of BCY and concluded that proton conduction dominates in hydrogen-water vapor atmosphere in the temperature range between 500 • C and 800 • C. By adding a metal phase to BCY, such as Ni-BCY, mixed proton-electronic conduction can be achieved.…”