The Study on Characteristic and Mechanical Strength of Thin Porous Fe-P Sheet Made by Tape Casting

Porous materials, when applied in batteries, require not only functional pores but also a certain level of mechanical strength. Therefore, this experiment attempts to add varying proportions of iron phosphide to the iron slurry, employing a tape casting process to produce thin porous iron-phosphorus sheets. We compare the characteristics (porosity, microstructure, resistance, etc.) and mechanical strength of the specimens resulting from different phosphorus contents. In the experiment, we control the phosphorus ratio in the iron-phosphorus mixture within the range of 0.0wt% to 1.5wt% and manufacture specimens with thicknesses ranging from 0.3mm to 0.6mm. At 1120°C during the sintering process, the phosphorus allows the specimens to reach liquid-phase sintering conditions. The experimental results indicate that a higher proportion of phosphorus significantly improves bonding between powders and enhances mechanical strength.