The effect of two different substituted atoms in lithium positions on the structure of garnet-type solid electrolytes

Authors : Sevda SARAN, Osman Murat ÖZKENDİR, Ülfet ATAV

Pages : 148-158

View : 14 | Download : 4

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :Li7 La3 Zr2 O12 insert ignore into journalissuearticles values(LLZO);, lithium lanthanum zirconate is a promising garnet-type solid electrolyte that is being intensively studied for solid-state lithium batteries. The properties of LLZO such as compatibility with the lithium electrode, stability, and ionic conductivity make them to be used in all solid-state batteries. Moreover, lithium ion concentration and distribution, doping different cations, chemical composition, and interaction between different dopants have remarkable effects on the ionic conduction of LLZO material. Herein, we investigate the solid electrolyte, Li6.4 insert ignore into journalissuearticles values(Gainsert ignore into journalissuearticles values(1−y); Ininsert ignore into journalissuearticles values(y); );0.2 La3 Zr2 O12 insert ignore into journalissuearticles values(y = 0.05, 0.10, 0.15, 0.20);, by probing the influence of indium substitution to gallium sites at the same lithium concentration on the structure and the lithium ion conduction. A conventional solid state route, ball milling was used to synthesize the materials. Crystal structure, morphology, ionic conduction, and local electronic structure were analysed by X-ray diffraction insert ignore into journalissuearticles values(XRD);, scanning electron microscopy insert ignore into journalissuearticles values(SEM);, electrochemical impedance spectroscopy insert ignore into journalissuearticles values(EIS); and X-ray absorption fine structure insert ignore into journalissuearticles values(XAFS); techniques, respectively. The results revealed that the existence of indium effected the conduction adversely, although made no significant changes on the local structure.
Keywords : Garnet type solid electrolytes, solid electrolytes, all solid state batteries