Apr 11, 2025
4:15pm - 4:30pm
Summit, Level 3, Room 327
Chun Chia Chen1,Wen-Wei Wu1,An-Yuan Hou1
National Yang Ming Chiao Tung University1
With the advancement of technology, the demand for energy storage devices is steadily increasing, particularly for use in consumer electronics and electric vehicles. Lithium-ion batteries, currently the dominant form of energy storage, are favored for their high energy density, low self-discharge rate, high open-circuit voltage, and long lifespan. Nevertheless, they still come with safety risks due to the highly flammable, reactive, and volatile nature of the liquid electrolyte that is typically used. As a result, developing safer alternatives has become a major focus in current research.
Among these materials, the LATP (Li
1.3Al
0.3Ti
1.7(PO
4)
3) solid-state electrolyte with a NASICON-type structure has attracted considerable attention. It offers superior safety compared to traditional liquid electrolytes, along with high ionic conductivity, lower production costs, and excellent stability in air and water, making it a promising material for future energy storage applications. However, challenges remain in its synthesis process. One important issue is the formation of secondary phases, such as AlPO
4, which negatively impacts ionic conductivity. Until now, limited studies have addressed these synthesis challenges in detail. Therefore, understanding the byproducts and the synthesis mechanism of LATP is important.
In this work, we use in-situ TEM to investigate the sintering process of LATP. Through an analysis of the phase transition, we clearly identified the transformation of LATP from an amorphous to a crystalline state, accompanied by the formation of several byproducts, including AlPO
4. Base on our research, eliminating the conditions that lead to the formation of these byproducts would significantly improve the synthesis of LATP. Our goal is to optimize the production process, enabling the large-scale manufacturing of LATP as a more reliable and effective energy storage material.