Flash sintering of cationic conductive ceramics: A way to build multilayer systems
Marie Lachal, Hana El Khal, Didier Bouvard, Jean‐Marc Chaix, Renaud Bouchet, M.C. Steil
Abstract
Abstract Flash Sintering (FS), that allows densifying ceramics at low furnace temperature in a few seconds, requires a reversible electrochemical reaction to enable the current flow through the electrode / material interface. For Li + pure ionic conductors such as Li 1.3 Al 0.3 Ti 1.7 (PO 4 ) 3 (LATP), the best material to ensure this fast charge transfer reaction is a mixed Li + /e − conductor, eg, LiCoO 2 (LCO). This paper demonstrates the feasibility of FS on LCO between two Pt electrodes and on multi‐layers systems using LCO or LATP+LCO composite as electrodes. It is shown that a composite electrode both allows the flash event to occur and prevents the delamination possibly observed with pure LCO by lowering interfacial stresses.