Mg-doping towards enhancing the composition-phase-structural stability of Li-La-zirconate based cubic garnet upon exposure to air. (15th March 2019)

• Record Type: Journal Article
• Authors: Amardeep, ; Kobi, Sushobhan; Mukhopadhyay, Amartya
• Is Part Of: Scripta materialia. Number 162(2019)
• Page Start: 214
• Page End: 218
• Publication Date: 2019-03-15
• Subjects: Lithium garnet -- Mg-doping -- Composition-phase-structural stability -- Ionic conductivity -- Solid electrolyte; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2018.11.026
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: Mg, as a new dopant, has been found to stabilize the desired cubic garnet structure ( Ia 3 ¯ d ) of Li-La-zirconate (LLZO) and lead to Li-ion conductivities similar to those obtained with the same level of Al-doping. More importantly, Mg-doping, as opposed to Al-doping, suppresses the deleterious reactions with the atmospheric moisture/CO2, leading to stability in the composition-phase-structure upon exposure to air. Accordingly, when exposed to air, even though Al-doped LLZO pellets get spontaneously fractured/disintegrated, accompanied by reduction in ionic conductivity by ~3 orders of magnitude, Mg-doped LLZO shows no sign of cracking and almost retains the ionic conductivity measured prior to exposure. Graphical abstract: Unlabelled Image