Composites of Ce0.8Gd0.2O1.9 and Gd0.7Ca0.3CoO3−δ as oxygen permeable membranes for exhaust gas sensors

Design and experimental investigation of oxide ceramic dual-phase membranes

“…The composite powder for pressing dual-phase membrane disks was usually prepared by mixing two as-synthesized powders [34][35][36][37]42,[45][46][47][48]. In previous research, we found that dual-phase membranes derived from the one-pot method show higher oxygen permeability than those derived from mixing two as-synthesized powders [40], and other researchers have also verified our findings [49].…”

“…Dual-phase materials consisting of Gd-doped CeO 2 (CGO) as an ion-conductive matrix and Sr-doped LaMnO 3 (LSM) or Ca-doped GdCoO 3 (GCC) as the electronic conduction path have been reported exhibiting mixed conductivity. However, the oxygen permeation fluxes of these membranes are far lower than those of perovskite membranes [34][35][36][37]. Recently, our group demonstrated a new kind of dual-phase membranes, which consist of a fast ionic conductor for oxide ionic transport and a mixed conductor for both ionic and electronic transport, and show high oxygen permeation flux and good stability for the partial oxidation of natural gas [38][39][40][41].…”

Nano-structure design of doped ceria solid electrolytes for intermediate temperature operation of solid oxide fuel cell

“…Toshiyuki Mori * , 1) Ding Rong Ou, 1) Fei Ye, 1) Jin Zou, 2) John Drennan 2) , and Alstair N. Cormack…”

“…Oxide ion conductors are used in a variety of gas sensors, [1][2][3][4] solid oxide electrochemical cells (SOECs), [5][6][7] and solid oxide fuel cells (SOFCs). [8][9][10][11][12] In those applications, SOFCs are being especially developed as a clean and efficient power source for generating electricity from a variety of fuels.…”

A novel CO2-resistant ceramic dual-phase hollow fiber membrane for oxygen separation

“…However, the oxygen flux rate of these membranes is very low due to the lack of sufficient electronic conductivity under oxidizing atmosphere. Logically, the dual-phase composite membranes consisting of fluorite and the second ceramic phase with high electronic conductivity like various pervoskite oxides or precious metals have been proposed [26][27][28][29][30][31][32][33][34][35][36]. Due to the requirement of the individual continuous material pathway to complete the ionic and electronic conduction, the addition of the electronic conducting perovskite phase should be more than 40%.…”