The effect of nickel doping on the microstructure and conductivity of Ca(Ti,Al)O_3–δ for solid oxide fuel cells

Abstract

Oxide-based ceramic membranes, conducting both oxide-ions and protons (H + ) at high temperatures, have been receiving enormous interest for a wide range of applications, including solid oxide fuel cells/electrolysers, catalytic oxidation of hydrocarbons, and selective oxygen/hydrogen separation membranes or permeation from air. [1][2][3][4][5][6][7][8] Although high oxygen flux has been reported for several perovskites and fluorite-related materials, combining both high flux and long-term stability still remains a challenge. Among these, the acceptor-doped calcium titanate (CaTiO 3 ) perovskite material has attracted considerable attention as a potential oxygen permeation membrane. 9 In particular, the constituent raw materials for making CaTiO 3 -based perovskites are abundant in nature, economical, non-toxic, possess high thermal stability, and are chemically stable under large oxygen chemical potential gradients at high temperatures. The mixed oxide and electronic conduction

Preparation of Ceramic Membranes and Their Application in Wastewater and Water Treatment

“…Burggraaf et al [54] published the first paper on sol-gel-derived ceramic membranes in 1984, attracting wide attention and accelerating research on inorganic membranes. The sol-gel method is widely used to prepare catalytic materials [22] and solid oxide fuel cells [55]; thin-film ceramic membranes can also be prepared using the sol-gel method [56]. Using this method, several casting steps must be performed to obtain a suitable film thickness.…”