WEB Experimental Approach for Phase Diagram determination of Li alloysFriday (28.02.2020) 16:37 - 16:37 Poster Room Part of:
The use of metallic anode materials in Li-ion batteries is beneficial due to the higher energy density compared to conventional carbonaceous negative electrodes. The knowledge of accurate phase diagrams and their thermodynamic properties combined in the so-called CALPHAD approach could accelerate the development of future materials.
However, determining experimental data of metallic anode materials is challenging. Metallic Lithium is air and moisture sensitive already at ambient temperatures. At evaluated temperatures, side reactions with the crucible and evaporation of the high reactive Li occur.
Using the example of the ternary Ga-Li-Sn system, the choice of an appropriate crucible material and crucible design will be presented. Experimental methods, such as thermal analysis experiments for phase transition temperatures or structure analysis experiments, require careful prearrangements. Crucible design and experimental details were adapted to the high reactive alloys.
Results from thermal analysis and crystal structure analysis are then used for phase diagram determination and optimization.