The two-phase multi-ionic conductor electroceramics are recently been developed for use in solid oxide fuel cells and CO2 separation membranes. The conventional solid-state mixing route has certain issues like lack of proper sintering which in turn leads to lower ionic conductivity and insufficient mechanical strength. In this study, the focus is on devising a novel technique of fabrication wherein GDC (Ce0.8Gd0.2O1.9) is prefabricated as a porous matrix (backbone structure) and subsequently melt infiltrated using the mixture of molten (LiNa)2CO3. Melt infiltration technique imparts better thermal stability, durability, and connectivity to the microstructure of (LiNa)2CO3-GDC nanocomposite membrane. The SEM micrographs of the GDC matrix shows well-sintered grain to grain connectivity which imparts better electrochemical performance. Melt infiltrated (LiNa)2CO3-GDC nanocomposite electrolyte shows an ionic conductivity greater than 0.1 S cm-1. The electrochemical performance (power density-current density characteristics) measured for (LiNa)2CO3-GDC melt infiltrated nanocomposite electrolytes was better than the ones prepared by solid state technique.

(LiNa)2CO3-GDC nanocomposite electroceramic membranes for hybrid solid oxide fuel cells

256th National Meeting (2018)

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.