The application of Al2O3 in separators and solid electrolytes of lithium-ion battery: A review

Due to the high surface activity, excellent hydrophilicity, and thermal stability, alumina (Al2O3) ceramic materials are extensively employed as modified additives for separator materials and solid-state electrolytes to construct lithium-ion batteries with high safety and high energy density. This review delves into the progress on the utilization of Al2O3 in separator materials and solid-state electrolytes of lithium-ion batteries, elucidating the action mechanism of Al2O3 and its specific roles in various manufacturing processes. Finally, the challenges and future prospects of Al2O3 in practical applications are outlined, providing strategies for the manufacture of high-performance lithium-ion batteries.