Flash sintering of cationic conductive ceramics: A way to build multilayer systems
Résumé
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 Li1.3Al0.3Ti1.7(PO4)3 (LATP), the best material to ensure this fast charge transfer reaction is a mixed Li + / econductor, e. g., LiCoO2 (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 2 composite electrode both allows the flash event to occur and prevents the delamination possibly observed with pure LCO by lowering interfacial stresses
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