Publications in Scientific Journals:
D. Campanella, G. Bertoni, W. Zhu, G. Girard, S. Savoie, A. Guerfi, A. Vijh, C. George, D. Belanger, A. Paolella:
"Gram-scale carbothermic control of LLZO garnet solid electrolyte particle size";
Chemical Engineering Journal,
In recent years, solid electrolytes have become an enticing alternative to liquid electrolytes in lithium batteries. However, the high synthesis temperatures and difficult optimization of solid-state electrolytes are an important drawback in a high-scale application. In this work, we demonstrate that the synthesis process of garnet-based Li7La3Zr2O12 (LLZO) electrolyte can be accelerated while reducing the formation temperature of cubic LLZO to about 720 °C from a standard temperature of 780 °C by supplementing the process with a carbon additive. These carbon-rich LLZO samples have a homogeneous particle distribution with a decreased average size, which is influenced by the type of the carbon additive itself. The materials with high carbon content show an improved densification after hot-pressing at a low temperature of 800 °C, which is reflected in their electrochemical performance, since LLZO sample with 10% of DENKA carbon additive shows a total ionic conductivity of 5.95 × 10-5 S cm-1, about 40% higher than the one of carbon-free LLZO (3.53 × 10-5 S cm-1).
"Official" electronic version of the publication (accessed through its Digital Object Identifier - DOI)
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