TY - JOUR
T1 - Gram-scale carbothermic control of LLZO garnet solid electrolyte particle size
AU - Campanella, Daniele
AU - Bertoni, Giovanni
AU - Zhu, Wen
AU - Girard, Gabriel
AU - Savoie, Sylvio
AU - Guerfi, Abdelbast
AU - Vijh, Ashok
AU - George, Chandramohan
AU - Belanger, Daniel
AU - Paolella, Andrea
PY - 2023/2/1
Y1 - 2023/2/1
N2 - 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).
AB - 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).
UR - https://www.mendeley.com/catalogue/bfce08b5-8d92-39ba-a286-02b8802b4607/
U2 - 10.1016/j.cej.2023.141349
DO - 10.1016/j.cej.2023.141349
M3 - Article
SN - 1385-8947
VL - 457
JO - Chemical Engineering Journal
JF - Chemical Engineering Journal
ER -