| 초록 |
Seawater batteries have been enormous attention as alternative batteries due to their high theoretical specific energy density (1683 Wh kg-1). However, it has limitations resulting from sluggish charge transfer kinetics during the oxygen evolution and reduction reactions (OER and ORR) at the cathode. Although the development and utilization of efficient catalysts with abundant and inexpensive elements are desirable, previous research has been focused on enhancing the sluggish kinetics using precious metal-based catalysts. In this research, we report that oxo-bridged tetraruthenium polyoxometalate (RuPOM) can act as an electrocatalyst for both OER and ORR using a small amount of noble metal elements and can be used for the development of efficient seawater batteries. By incorporating the RuPOM with conducting carbon (Ketjen black), RuPOM catalyst composites exhibited superior OER/ORR activity even compared to commercially available Pt/C when comparing the activity per noble metal element. RuPOM catalyst composites not only lowered overpotential but also enhanced the electrochemical surface area of seawater battery. This study can provide insights into the development of POM-based electrocatalysts and their application in energy storage and conversion devices. |
