[O-07] Poster presentations by senior high school students

[O07-P08] Development of iron (II) phosphate lithium-ion battery using the adsorption power of Aso loess

*Ayumi Hoshi¹, *Sora Nozaki¹ (1.Tokyo Metropolitan Tama High School of Science and Technology)

Keywords:Aso loess, Iron (II) Phosphate Lithium Ion Battery

Now, the depletion of phosphorus is regarded as a problem worldwide. In order to solve this problem, we wondered if phosphorus could be adsorbed from surplus fertilizer in fields and reused. Adsorption is performed using Aso loess. Aso ocher is the ocher-colored soil that can be found in the mountains of Aso, and is also known as "limonite." About 70% of its constituents are made of iron. In addition, it has high binding properties with various gases and harmful substances, and is demonstrating its adsorptive power in a lot of fields. When phosphoric acid is adsorbed on Aso loess, the phosphoric acid and iron contained in Aso loess combine to form iron phosphate. The ultimate goal is to utilize the iron phosphate as a positive electrode material for iron (II) phosphate lithium-ion batteries. As a first step, this time we conducted an experiment to confirm the adsorption power of Aso loess.